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Predictions of bimanual self-touch determine the temporal tuning of somatosensory perception
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311796.pdf (Publisher’s version ) (Open Access)We easily distinguish self-touch from the touch of others. This distinction is suggested to arise because the brain predicts the somatosensory consequences of voluntary movements using an efference copy and attenuates the predicted self-touch. However, it remains unclear how these predictions impact somatosensory perception before or after the self-touch occurs. Here, participants discriminated forces applied to their left index finger at different phases of the right hand’s reaching movement towards the left hand. We observed that forces felt progressively weaker during the reaching, reached their minimum perceived intensity at the time of self-touch, and recovered after the movement ended. We further demonstrated that this gradual attenuation vanished during similar reaching movements that did not produce expectations of self-touch between the two hands. Our results indicate a temporal tuning of somatosensory perception during movements to self-touch and underscore the role of sensorimotor context in forming predictions that attenuate the self-touch intensity.19 p
vSHARP: Variable Splitting Half-quadratic ADMM algorithm for reconstruction of inverse-problems.
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313187.pdf (Publisher’s version ) (Open Access)Medical Imaging (MI) tasks, such as accelerated parallel Magnetic Resonance Imaging (MRI), often involve reconstructing an image from noisy or incomplete measurements. This amounts to solving ill-posed inverse problems, where a satisfactory closed-form analytical solution is not available. Traditional methods such as Compressed Sensing (CS) in MRI reconstruction can be time-consuming or prone to obtaining low-fidelity images. Recently, a plethora of Deep Learning (DL) approaches have demonstrated superior performance in inverse-problem solving, surpassing conventional methods. In this study, we propose vSHARP (variable Splitting Half-quadratic ADMM algorithm for Reconstruction of inverse Problems), a novel DL-based method for solving ill-posed inverse problems arising in MI. vSHARP utilizes the Half-Quadratic Variable Splitting method and employs the Alternating Direction Method of Multipliers (ADMM) to unroll the optimization process. For data consistency, vSHARP unrolls a differentiable gradient descent process in the image domain, while a DL-based denoiser, such as a U-Net architecture, is applied to enhance image quality. vSHARP also employs a dilated-convolution DL-based model to predict the Lagrange multipliers for the ADMM initialization. We evaluate vSHARP on tasks of accelerated parallel MRI Reconstruction using two distinct datasets and on accelerated parallel dynamic MRI Reconstruction using another dataset. Our comparative analysis with state-of-the-art methods demonstrates the superior performance of vSHARP in these applications.01 januari 202
Chronic pancreatitis.
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315830.pdf (Publisher’s version ) (Open Access)Chronic pancreatitis is a progressive fibroinflammatory disease primarily caused by a complex interplay of environmental and genetic risk factors. It might result in pancreatic exocrine and endocrine insufficiency, chronic pain, reduced quality of life, and increased mortality. The diagnosis is based on the presence of typical symptoms and multiple morphological manifestations of the pancreas, including pancreatic duct stones and strictures, parenchymal calcifications, and pseudocysts. Management of chronic pancreatitis consists of prevention and treatment of complications, requiring a multidisciplinary approach focusing on lifestyle modifications, exocrine insufficiency, nutritional status, bone health, endocrine insufficiency, pain management, and psychological care. To optimise clinical outcomes, screening for complications and evaluation of treatment efficacy are indicated in all patients with chronic pancreatitis
Good plasmons in a bad metal
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318409pub.pdf (Publisher’s version ) (Open Access)
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318409pre.pdf (Author’s version preprint ) (Closed access
De inhoudstoets bij algemene voorwaarden en de samenloop tussen art. 6:233 aanhef en onder a BW en art. 6:248 lid 2 BW
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317997.pdf (Publisher’s version ) (Open Access)25 maart 202510 p
The multidisciplinary and participatory process to develop the Rubric for Learning Communities about Health Approaches
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317762.pdf (Publisher’s version ) (Open Access)INTRODUCTION: Many Dutch municipalities implement a systems approach to promote health behavior among citizens. Learning communities (LCs) in these approaches enable stakeholders to collaborate and learn from one another. To optimize LCs, insights are needed into how LCs create knowledge and put it into action. This study aimed to describe the multidisciplinary and participatory process to develop a rubric for multidisciplinary Learning communities about health approaches. METHODS: The rubric development took the form of a questionnaire, and was centred on a municipal healthy weight approach. The development consisted of three steps: (1) an iterative process involving literature and input from members and experts, (2) an expert session, and (3) qualitative and quantitative rubric reliability and usability tests. RESULTS: Five rubric versions were developed, resulting in a final version with eight constructs to assess LC partnership experiences, learning, and action. The rubric demonstrated a relatively high reliability. The rubric's adequate usability performance was evidenced by its high response rate, which enabled researchers to gain insights into notable findings. These findings then facilitated discussions among LC members and formulated LC adjustments. DISCUSSION: The participative process played a crucial role in developing the rubric. LC facilitators are encouraged to apply the rubric. Future research is needed regarding the reliability and usability of the rubric in other settings.8 p
The unstable social networks of students: Where does dissimilarity drive tie dissolution?
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312423.pdf (Publisher’s version ) (Open Access)Social relations between demographically dissimilar people are less likely to last. But up till now, why relations with dissimilar friends, confidants, or even sport partners are less stable has remained unclear. We argue that the faster dissolution of ties to dissimilar others may stem from their weaker embeddedness in our social networks. We may feel less emotionally close to those who differ from us in key social dimensions such as gender, age, and education, and these alters may fulfill fewer roles (e.g., friend and study partner, or 'multiplexity'). Moreover, their dissimilarity may hinder their ability to form relations with others in our social network. In this contribution, we investigate the impact of ego-alter dissimilarity on the stability of friendships, confidants, and study and sport relations, while acknowledging multiplexity - recognizing that the same alter may serve different roles. We find that ego-alter age dissimilarity is associated with tie dissolution; relations are less stable and consistently so across emotional and instrumental network layers. Gender and education dissimilarity do not impact relationship stability among our sample of Dutch students. The better alters are embedded in ego's network, the more stable are their ties. Relational embeddedness (i.e., emotional closeness and role overlap) predominantly affects the stability of confidants and friendship relations; structural embeddedness (i.e., alters having ties to ego's other alters) predominantly affects the stability of study relations. This also explains why relations with differently aged alters are less stable.24 p
Global ecology and geography of gender equality
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306297.pdf (Publisher’s version ) (Closed access)Proximal socio-economic drivers of gender equality tend to obscure its remote ecological origins. General systems theory predicts that the greater annual variability in daylength, temperature, and daily precipitation at higher latitudes requires greater psychosocial flexibility. We extend this prediction to gender equality as a likely consequence. Accordingly, for 87 pre-industrial societies after 1500 CE, we find more gender equality in more variable habitats, and that this link is mediated by greater subsistence flexibility - foraging rather than raising plants and animals. Mutatis mutandis, these ecological predictors of global gender equality replicate in 175 modern countries after 2000 CE. Gender equality was, and still is, lowest around the Equator, higher toward the North and South Poles, and invariant in east–west direction. The geographical positioning of gender equality in pre-industrial times can predict over 40% of the opposite north-south gradients of gender equality in the opposite Northern and Southern Hemispheres today.15 p
Comparing Manual and Automatic Artifact Detection in Sleep EEG Recordings.
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316636.pdf (Publisher’s version ) (Open Access)Sleep electroencephalogram (EEG) recordings can be contaminated by artifacts. Visual and automatic methods have been developed to mark such erroneous segments of EEG data. Here, we systematically explored the effect of artifacts on the sleep EEG power spectrum density (PSD), and we compared gold-standard visual detections to a simple automatic detector using Hjorth parameters to identify artifacts. We found that most distortions in the all-night average PSD occur because of a small minority of highly anomalous artifacts, which mainly affect the beta and gamma frequency ranges and NREM delta. Visual and automatic detections only showed moderate agreement in which data segments are artifactual. However, the resulting all-night average PSD is highly similar across all methods, and PSDs calculated with all methods successfully recover the known correlations of PSD with age and sex. No parameter settings of the automatic detector clearly outperformed others. Additionally, we showed that accurate average PSD estimates can be recovered from just a fraction of available data epochs. Our results suggest that artifacts represent a minor and easily solvable problem in sleep EEG recordings. Most visually identified artifacts do not seriously distort estimates of mid-frequency activity in the sleep EEG spectrum, and distortions to low and high frequencies can be eliminated using a simple automatic detection method nearly as well as with visual detections. These findings show that the visual inspection of EEG data is not necessary to eliminate the effects of artifacts, which is encouraging for the expected performance of automatic preprocessing in large sleep EEG databases.01 februari 202513 p
Invariant neural architecture for learning term synthesis in instantiation proving
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310648.pdf (Publisher’s version ) (Open Access