Charlottesville
SILENCE: Lightweight Protection for Privacy in Offloaded Speech Understanding
Speech serves as a ubiquitous input interface for embedded mobile devices. Cloud-based solutions, while offering powerful speech understanding services, raise significant concerns regarding user privacy. To address this, disentanglement-based encoders have been proposed to remove sensitive information from speech signals without compromising the speech understanding functionality. However, these encoders demand high memory usage and computation complexity, making them impractical for resource-constrained wimpy devices. Our solution is based on a key observation that speech understanding hinges on long-term dependency knowledge of the entire utterance, in contrast to privacy-sensitive elements that are short-term dependent. Exploiting this observation, we propose SILENCE, a lightweight system that selectively obscuring short-term details, without damaging the long-term dependent speech understanding performance. The crucial part of SILENCE is a differential mask generator derived from interpretable learning to automatically configure the masking process. We have implemented SILENCE on the STM32H7 microcontroller and evaluate its efficacy under different attacking scenarios. Our results demonstrate that SILENCE offers speech understanding performance and privacy protection capacity comparable to existing encoders, while achieving up to 53.3 speedup and 134.1 reduction in memory footprint.
- Asia > China > Guangdong Province > Shenzhen (0.05)
- North America > United States > Virginia > Albemarle County > Charlottesville (0.04)
- Research Report > Experimental Study (0.93)
- Research Report > New Finding (0.68)
- Information Technology > Security & Privacy (1.00)
- Health & Medicine (1.00)
MedSafetyBench: Evaluating and Improving the Medical Safety of Large Language Models
However, there is little to no understanding of the notion of medical safety in the context of LLMs, let alone how to evaluate and improve it. To address this gap, we first define the notion of medical safety in LLMs based on the Principles of Medical Ethics set forth by the American Medical Association.
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- North America > United States > Massachusetts > Middlesex County > Cambridge (0.04)
- North America > United States > Virginia > Albemarle County > Charlottesville (0.04)
- Research Report > New Finding (1.00)
- Research Report > Experimental Study (0.93)
- North America > United States > Massachusetts > Middlesex County > Cambridge (0.05)
- Africa > Kenya (0.04)
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- North America > United States > Virginia > Albemarle County > Charlottesville (0.04)
- Asia > Middle East > Jordan (0.04)
- North America > United States > Maryland > Prince George's County > College Park (0.14)
- North America > United States > Virginia > Albemarle County > Charlottesville (0.04)
- Asia > Middle East > Jordan (0.04)
Assessing the informative value of macroeconomic indicators for public health forecasting
Chakraborty, Shome, Khan, Fardil, Ghosal, Soutik
Macroeconomic conditions influence the environments in which health systems operate, yet their value as leading signals of health system capacity has not been systematically evaluated. In this study, we examine whether selected macroeconomic indicators contain predictive information for several capacity-related public health targets, including employment in the health and social assistance workforce, new business applications in the sector, and health care construction spending. Using monthly U.S. time series data, we evaluate multiple forecasting approaches, including neural network models with different optimization strategies, generalized additive models, random forests, and time series models with exogenous macroeconomic indicators, under alternative model fitting designs. Across evaluation settings, we find that macroeconomic indicators provide a consistent and reproducible predictive signal for some public health targets, particularly workforce and infrastructure measures, while other targets exhibit weaker or less stable predictability. Models emphasizing stability and implicit regularization tend to perform more reliably during periods of economic volatility. These findings suggest that macroeconomic indicators may serve as useful upstream signals for digital public health monitoring, while underscoring the need for careful model selection and validation when translating economic trends into health system forecasting tools.
- North America > United States > Virginia > Albemarle County > Charlottesville (0.14)
- North America > Trinidad and Tobago > Trinidad > Arima > Arima (0.05)
- North America > United States > New York > New York County > New York City (0.04)
- (4 more...)
Penalizing Localized Dirichlet Energies in Low Rank Tensor Products
Karakasis, Paris A., Sidiropoulos, Nicholas D.
We study low-rank tensor-product B-spline (TPBS) models for regression tasks and investigate Dirichlet energy as a measure of smoothness. We show that TPBS models admit a closed-form expression for the Dirichlet energy, and reveal scenarios where perfect interpolation is possible with exponentially small Dirichlet energy. This renders global Dirichlet energy-based regularization ineffective. To address this limitation, we propose a novel regularization strategy based on local Dirichlet energies defined on small hypercubes centered at the training points. Leveraging pretrained TPBS models, we also introduce two estimators for inference from incomplete samples. Comparative experiments with neural networks demonstrate that TPBS models outperform neural networks in the overfitting regime for most datasets, and maintain competitive performance otherwise. Overall, TPBS models exhibit greater robustness to overfitting and consistently benefit from regularization, while neural networks are more sensitive to overfitting and less effective in leveraging regularization.
- Europe > United Kingdom > England > Cambridgeshire > Cambridge (0.04)
- North America > United States > Wisconsin (0.04)
- North America > United States > Virginia > Albemarle County > Charlottesville (0.04)
The Download: digitizing India, and scoring embryos
The man who made India digital isn't done yet Nandan Nilekani can't stop trying to push India into the future. He started nearly 30 years ago, masterminding an ongoing experiment in technological state capacity that started with Aadhaar--the world's largest digital identity system. Using Aadhaar as the bedrock, Nilekani and people working with him went on to build a sprawling collection of free, interoperating online tools that add up to nothing less than a digital infrastructure for society, covering government services, banking, and health care. They offer convenience and access that would be eye-popping in wealthy countries a tenth of India's size. At 70 years old, Nilekani should be retired. But he has a few more ideas.
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- Oceania > Australia (0.05)
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- Information Technology (0.70)
- Government (0.68)
- Health & Medicine > Therapeutic Area (0.30)
Mitigating Exposure Bias in Risk-Aware Time Series Forecasting with Soft Tokens
Namazi, Alireza, Fathkouhi, Amirreza Dolatpour, Shakeri, Heman
Autoregressive forecasting is central to predictive control in diabetes and hemodynamic management, where different operating zones carry different clinical risks. Standard models trained with teacher forcing suffer from exposure bias, yielding unstable multi-step forecasts for closed-loop use. We introduce Soft-Token Trajectory Forecasting (SoTra), which propagates continuous probability distributions (``soft tokens'') to mitigate exposure bias and learn calibrated, uncertainty-aware trajectories. A risk-aware decoding module then minimizes expected clinical harm. In glucose forecasting, SoTra reduces average zone-based risk by 18\%; in blood-pressure forecasting, it lowers effective clinical risk by approximately 15\%. These improvements support its use in safety-critical predictive control.
- North America > United States > Virginia > Albemarle County > Charlottesville (0.14)
- North America > United States > New Jersey > Hudson County > Hoboken (0.04)
- Europe > United Kingdom > England (0.04)
POrTAL: Plan-Orchestrated Tree Assembly for Lookahead
Conway, Evan, Porfirio, David, Chan, David, Roberts, Mark, Hiatt, Laura M.
Abstract-- Assigning tasks to robots often involves supplying the robot with an overarching goal, such as through natural language, and then relying on the robot to uncover and execute a plan to achieve that goal. In many settings common to human-robot interaction, however, the world is only partially observable to the robot, requiring that it create plans under uncertainty. Although many probabilistic planning algorithms exist for this purpose, these algorithms can be inefficient if executed with the robot's limited computational resources, or may require more steps than expected to achieve the goal. We thereby created a new, lightweight, probabilistic planning algorithm, Plan-Orchestrated Tree Assembly for Lookahead (POrTAL), that combines the strengths of two baseline planning algorithms, FF-Replan and POMCP . In a series of case studies, we demonstrate POrTAL's ability to quickly arrive at solutions that outperform these baselines in terms of number of steps. We additionally demonstrate how POrTAL performs under varying temporal constraints. The ability of modern robots to respond to arbitrary user requests has advanced considerably in recent years. This advancement is in large part due to robots' ability to autonomously plan their own actions. When receiving a goal such as "bring me a cup of coffee," for example, a robot can calculate the minimum number of steps required to achieve this goal: obtain the coffee grinds, proceeding to the coffee maker, load the grinds, and so on. In many scenarios common to human-robot interaction, however, this planning must be performed under considerable uncertainty.
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- Europe > United Kingdom > England > Cambridgeshire > Cambridge (0.04)
- Government > Military > Navy (0.94)
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- Information Technology > Artificial Intelligence > Robots (1.00)
- Information Technology > Artificial Intelligence > Representation & Reasoning > Planning & Scheduling (1.00)
- Information Technology > Artificial Intelligence > Machine Learning > Learning Graphical Models > Undirected Networks > Markov Models (0.48)