Arapahoe County
Personalized Control for Lower Limb Prosthesis Using Kolmogorov-Arnold Networks
Mohasel, SeyedMojtaba, Aghaei, Alireza Afzal, Pew, Corey
Objective: This paper investigates the potential of learnable activation functions in Kolmogorov-Arnold Networks (KANs) for personalized control in a lower-limb prosthesis. In addition, user-specific vs. pooled training data is evaluated to improve machine learning (ML) and Deep Learning (DL) performance for turn intent prediction. Method: Inertial measurement unit (IMU) data from the shank were collected from five individuals with lower-limb amputation performing turning tasks in a laboratory setting. Ability to classify an upcoming turn was evaluated for Multilayer Perceptron (MLP), Kolmogorov-Arnold Network (KAN), convolutional neural network (CNN), and fractional Kolmogorov-Arnold Networks (FKAN). The comparison of MLP and KAN (for ML models) and FKAN and CNN (for DL models) assessed the effectiveness of learnable activation functions. Models were trained separately on user-specific and pooled data to evaluate the impact of training data on their performance. Results: Learnable activation functions in KAN and FKAN did not yield significant improvement compared to MLP and CNN, respectively. Training on user-specific data yielded superior results compared to pooled data for ML models ($p < 0.05$). In contrast, no significant difference was observed between user-specific and pooled training for DL models. Significance: These findings suggest that learnable activation functions may demonstrate distinct advantages in datasets involving more complex tasks and larger volumes. In addition, pooled training showed comparable performance to user-specific training in DL models, indicating that model training for prosthesis control can utilize data from multiple participants.
Rotograb: Combining Biomimetic Hands with Industrial Grippers using a Rotating Thumb
Bersier, Arnaud, Leonforte, Matteo, Vanetta, Alessio, Wotke, Sarah Lia Andrea, Nappi, Andrea, Zhou, Yifan, Oliani, Sebastiano, Kรผbler, Alexander M., Katzschmann, Robert K.
The development of robotic grippers and hands for automation aims to emulate human dexterity without sacrificing the efficiency of industrial grippers. This study introduces Rotograb, a tendon-actuated robotic hand featuring a novel rotating thumb. The aim is to combine the dexterity of human hands with the efficiency of industrial grippers. The rotating thumb enlarges the workspace and allows in-hand manipulation. A novel joint design minimizes movement interference and simplifies kinematics, using a cutout for tendon routing. We integrate teleoperation, using a depth camera for real-time tracking and autonomous manipulation powered by reinforcement learning with proximal policy optimization. Experimental evaluations demonstrate that Rotograb's rotating thumb greatly improves both operational versatility and workspace. It can handle various grasping and manipulation tasks with objects from the YCB dataset, with particularly good results when rotating objects within its grasp. Rotograb represents a notable step towards bridging the capability gap between human hands and industrial grippers. The tendon-routing and thumb-rotating mechanisms allow for a new level of control and dexterity. Integrating teleoperation and autonomous learning underscores Rotograb's adaptability and sophistication, promising substantial advancements in both robotics research and practical applications.
TrustUQA: A Trustful Framework for Unified Structured Data Question Answering
Zhang, Wen, Jin, Long, Zhu, Yushan, Chen, Jiaoyan, Huang, Zhiwei, Wang, Junjie, Hua, Yin, Liang, Lei, Chen, Huajun
Natural language question answering (QA) over structured data sources such as tables and knowledge graphs (KGs) have been widely investigated, for example with Large Language Models (LLMs). The main solutions include question to formal query parsing and retrieval-based answer generation. However, current methods of the former often suffer from weak generalization, failing to dealing with multiple sources simultaneously, while the later is limited in trustfulness. In this paper, we propose UnifiedTQA, a trustful QA framework that can simultaneously support multiple types of structured data in a unified way. To this end, it adopts an LLM-friendly and unified knowledge representation method called Condition Graph (CG), and uses an LLM and demonstration-based two-level method for CG querying. For enhancement, it is also equipped with dynamic demonstration retrieval. We have evaluated UnifiedTQA with 5 benchmarks covering 3 types of structured data. It outperforms 2 existing unified structured data QA methods and in comparison with the baselines that are specific to a data type, it achieves state-of-the-art on 2 of them. Further more, we demonstrates potential of our method for more general QA tasks, QA over mixed structured data and QA across structured data.
Linguistic-Based Mild Cognitive Impairment Detection Using Informative Loss
Fard, Ali Pourramezan, Mahoor, Mohammad H., Alsuhaibani, Muath, Dodgec, Hiroko H.
This paper presents a deep learning method using Natural Language Processing (NLP) techniques, to distinguish between Mild Cognitive Impairment (MCI) and Normal Cognitive (NC) conditions in older adults. We propose a framework that analyzes transcripts generated from video interviews collected within the I-CONECT study project, a randomized controlled trial aimed at improving cognitive functions through video chats. Our proposed NLP framework consists of two Transformer-based modules, namely Sentence Embedding (SE) and Sentence Cross Attention (SCA). First, the SE module captures contextual relationships between words within each sentence. Subsequently, the SCA module extracts temporal features from a sequence of sentences. This feature is then used by a Multi-Layer Perceptron (MLP) for the classification of subjects into MCI or NC. To build a robust model, we propose a novel loss function, called InfoLoss, that considers the reduction in entropy by observing each sequence of sentences to ultimately enhance the classification accuracy. The results of our comprehensive model evaluation using the I-CONECT dataset show that our framework can distinguish between MCI and NC with an average area under the curve of 84.75%.
Tesla robot goes haywire on engineer in Texas factory: 'Trail of blood'
Production of the Tesla CyberTruck is delayed, so a man in Vietnam made his own. A Tesla engineer was reportedly a victim of a bloody attack by a robot at a factory near Austin, Texas. Recent reports revealed that a 2021 injury report which claims the robot that was designed to move aluminum car parts, pinned the engineer against a surface and dug its metal claws into the his back and arm, according to witnesses who spoke to The Information in a story published last month. After another worker hit an emergency stop button, the engineer maneuvered his way out of the robot's grasp, falling a couple of feet down a chute designed to collect scrap aluminum and leaving a trail of blood behind him, one of the witnesses told The Information. The attack reportedly occurred while the engineer was programming software for two disabled Tesla robots nearby.
Latest Xbox accessibility features include controller pairing without touching the console
On Tuesday, Microsoft announced a slew of accessibility updates for Xbox players on consoles and PCs. These include keyboard key remapping using controllers, easier-to-get-to accessibility shortcuts and a new section in the Microsoft Store. In a reminder that inclusive design can help everyone, one of the new features will let anyone set up a new controller without getting up to press a pair button on the console. Wireless controller pairing no longer requires direct console contact. "From the comfort of a couch, wheelchair, hospital bed, etc., players can now put their console into pairing mode using an Xbox media remote, digital assistant voice command, or previously paired controller to connect a new controller to their console," the company wrote today in a blog post.
US probes crash involving Tesla that hit student exiting school bus
Fox News Flash top headlines are here. Check out what's clicking on Foxnews.com. U.S. road safety regulators have sent a team to investigate a crash involving a Tesla that may have been operating on a partially automated driving system when it struck a student who had just exited a school bus. The National Highway Traffic Safety Administration Friday that it will probe the March 15 crash in Halifax County, North Carolina, that injured a 17-year-old student. The State Highway Patrol said the driver of the 2022 Tesla Model Y, a 51-year-old male, failed to stop for the bus, which was displaying all of its activated warning devices.
Investigation underway after AI tool may have misinterpreted a child's disability as parental neglect
Fox News Flash top headlines are here. Check out what's clicking on Foxnews.com. For the two weeks that the Hackneys' baby girl lay in a Pittsburgh hospital bed weak from dehydration, her parents rarely left her side, sometimes sleeping on the fold-out sofa in the room. They stayed with their daughter around the clock when she was moved to a rehab center to regain her strength. Finally, the 8-month-old stopped batting away her bottles and started putting on weight again. "She was doing well and we started to ask when can she go home," Lauren Hackney said.
TurbuGAN: An Adversarial Learning Approach to Spatially-Varying Multiframe Blind Deconvolution with Applications to Imaging Through Turbulence
Feng, Brandon Yushan, Xie, Mingyang, Metzler, Christopher A.
We present a self-supervised and self-calibrating multi-shot approach to imaging through atmospheric turbulence, called TurbuGAN. Our approach requires no paired training data, adapts itself to the distribution of the turbulence, leverages domain-specific data priors, and can generalize from tens to thousands of measurements. We achieve such functionality through an adversarial sensing framework adapted from CryoGAN, which uses a discriminator network to match the distributions of captured and simulated measurements. Our framework builds on CryoGAN by (1) generalizing the forward measurement model to incorporate physically accurate and computationally efficient models for light propagation through anisoplanatic turbulence, (2) enabling adaptation to slightly misspecified forward models, and (3) leveraging domain-specific prior knowledge using pretrained generative networks, when available. We validate TurbuGAN on both computationally simulated and experimentally captured images distorted with anisoplanatic turbulence.
Leveraging Wastewater Monitoring for COVID-19 Forecasting in the US: a Deep Learning study
Fazli, Mehrdad, Shakeri, Heman
The outburst of COVID-19 in late 2019 was the start of a health crisis that shook the world and took millions of lives in the ensuing years. Many governments and health officials failed to arrest the rapid circulation of infection in their communities. The long incubation period and the large proportion of asymptomatic cases made COVID-19 particularly elusive to track. However, wastewater monitoring soon became a promising data source in addition to conventional indicators such as confirmed daily cases, hospitalizations, and deaths. Despite the consensus on the effectiveness of wastewater viral load data, there is a lack of methodological approaches that leverage viral load to improve COVID-19 forecasting. This paper proposes using deep learning to automatically discover the relationship between daily confirmed cases and viral load data. We trained one Deep Temporal Convolutional Networks (DeepTCN) and one Temporal Fusion Transformer (TFT) model to build a global forecasting model. We supplement the daily confirmed cases with viral loads and other socio-economic factors as covariates to the models. Our results suggest that TFT outperforms DeepTCN and learns a better association between viral load and daily cases. We demonstrated that equipping the models with the viral load improves their forecasting performance significantly. Moreover, viral load is shown to be the second most predictive input, following the containment and health index. Our results reveal the feasibility of training a location-agnostic deep-learning model to capture the dynamics of infection diffusion when wastewater viral load data is provided.