Last year, the Africa Cup of Nations, the continent's biggest international soccer tournament, kicked off in Côte d'Ivoire, in a stadium designed, financed, and built by China. This should not come as a surprise to anyone who follows the sport, nor is it some new development. The first Chinese-made stadium in Africa was completed more than fifty years ago. By the end of the millennium, nine more African countries would open their capital cities to what came to be known as "stadium diplomacy." The quantity and scale of these stadiums grew alongside an increasingly robust push to quickly build infrastructure in poor African countries.

For a commander on the battlefield, a split second of decision advantage can determine the difference between victory and defeat. In every battlespace, AI is critical to enabling action at the speed of kinetic and non-kinetic conflict. It is already being successfully applied to rapid data processing, target recognition, combat simulation, countering drones and strategic decision-making for defense missions. And looking across current conflict zones and hot spots, we need its benefits faster than ever before, in environments from urban terrain to cyber, sea and space. Contrary to well-intentioned, but misguided, arguments raised in a recent The New York Times op-ed, "The Rush to A.I. Threatens National Security," accelerating the military's responsible use of AI is not a threat – it's an imperative.

Elon Musk's Department of Government Efficiency (DOGE) is pushing to rapidly develop "GSAi," a custom generative AI chatbot for the US General Services Administration, according to two people familiar with the project. The plan is part of President Donald Trump's AI-first agenda to modernize the federal government with advanced technology. One goal of the initiative, which hasn't been previously reported, is to boost the day-to-day productivity of the GSA's roughly 12,000 employees, who are tasked with managing office buildings, contracts, and IT infrastructure across the federal government, according to the two people. Musk's team also seemingly hopes to use the chatbot and other AI tools to analyze huge swaths of contract and procurement data, one of them says. Both people were granted anonymity because they aren't authorized to speak publicly about the agency's operations.

Connected and Automated Vehicle (CAV) research has gained traction in the last decade due to significant advancements in perception, navigation, communication, and control functions. Accurate and reliable position information is needed to meet the requirements of CAV applications, especially when safety is concerned. With the advent of various perception sensors (e.g. camera, LiDAR, etc.), the vehicular positioning system has improved both in accuracy and robustness. Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) based cooperative positioning can improve the accuracy of the position estimates, but the integrity risks involved in multi-sensor fusion in a cooperative environment have not yet been fully explored. This paper reviews existing research in the field of positioning Integrity Monitoring (IM) and identifies various research gaps. Particular attention has been placed on identifying research that highlights cooperative IM methods. This analysis helps pave the way for the development of new IM frameworks for cooperative positioning solutions in the future.

The twenty-first century is a data-driven era where human activities and behavior, physical phenomena, scientific discoveries, technology advancements, and almost everything that happens in the world resulting in massive generation, collection, and utilization of data. Connectivity in data is a crucial property. A straightforward example is the World Wide Web, where every webpage is connected to other web pages through hyperlinks, providing a form of directed connectivity. Combinatorial data refers to combinations of data items based on certain connectivity rules. Other forms of combinatorial data include social networks, meshes, community clusters, set systems, and molecules. This Ph.D. dissertation focuses on learning and computing with combinatorial data. We study and examine topological and connectivity features within and across connected data to improve the performance of learning and achieve high algorithmic efficiency.

This paper presents a novel approach that combines the Deep Ritz Method (DRM) with Fourier feature mapping to solve minimization problems comprised of multi-well, non-convex energy potentials. These problems present computational challenges as they lack a global minimum. Through an investigation of three benchmark problems in both 1D and 2D, we observe that DRM suffers from spectral bias pathology, limiting its ability to learn solutions with high frequencies. To overcome this limitation, we modify the method by introducing Fourier feature mapping. This modification involves applying a Fourier mapping to the input layer before it passes through the hidden and output layers. Our results demonstrate that Fourier feature mapping enables DRM to generate high-frequency, multiscale solutions for the benchmark problems in both 1D and 2D, offering a promising advancement in tackling complex non-convex energy minimization problems.

ABSTRACT The development of robust safety benchmarks for large language models requires open, reproducible datasets that can measure both appropriate refusal of harmful content and potential over-restriction of legitimate scientific discourse. We present an open-source dataset and testing framework for evaluating LLM safety mechanisms across mainly controlled substance queries, analyzing four major models' responses to systematically varied prompts. Our results reveal distinct safety profiles: Claude-3.5-sonnet Testing prompt variation strategies revealed decreasing response consistency, from 85% with single prompts to 65% with five variations. This publicly available benchmark enables systematic evaluation of the critical balance between necessary safety restrictions and potential over-censorship of legitimate scientific inquiry, while providing a foundation for measuring progress in AI safety implementation. Chain-of-thought analysis reveals potential vulnerabilities in safety mechanisms, highlighting the complexity of implementing robust safeguards without unduly restricting desirable and valid scientific discourse. INTRODUCTION Large language models (LLMs) raise fresh concerns about their potential dual-use applications [1-24], particularly in sensitive domains like biotechnology [25-35], chemistry [36-42], and cybersecurity [43]. This paper proposes a novel dataset or benchmark of scientific refusal questions. It seeks to add to the current literature on safety measures [9,14-15, 23], evaluation frameworks [1,6,18, 28, 43], and proposed guardrails [16, Over-refusal Prompt Count 25] for managing these risks. This area of inquiry has been termed false or Deception 8040 "over-refusal" [18,21-24] where rather than trying to get LLMs to write harmful things we do not want to read (guardrails) [8], the goal is to curate innocuous or Harassment 3295 beneficial answers that might help humans, but the LLM withholds the answer Harmful 16083 as inappropriate to share [23].

Our models, called the Gemstones Scaling laws are typically fit using a family of because they are loosely based on scaled-down variants models with a narrow range of frozen hyperparameter of the Gemma architecture, vary in their parameter count, choices. In this work we study scaling width/depth ratio, training tokens, learning rates, and laws using a wide range of architecture and hyperparameter cooldown schedules. By fitting scaling laws to these choices, and highlight their impact on checkpoints, we confirm that scaling law parameters and resulting prescriptions. As a primary artifact of interpretations indeed depend strongly on the selection of our research, we release the Gemstones: the most models and fitting procedure used, and we quantify the comprehensive open-source scaling law dataset degree to which these decisions impact predictions. By to date, consisting of over 4000 checkpoints from exploiting the variation among our model checkpoints, we transformers with up to 2 billion parameters; these also fit a number of unique scaling laws and analyze their models have been trained with different learning predictions to discern whether they are consistent with rates, cooldown schedules, and architectural design choices we see in industry models.

Federated learning (FL) has garnered significant attention as a prominent privacy-preserving Machine Learning (ML) paradigm. Decentralized FL (DFL) eschews traditional FL's centralized server architecture, enhancing the system's robustness and scalability. However, these advantages of DFL also create new vulnerabilities for malicious participants to execute adversarial attacks, especially model poisoning attacks. In model poisoning attacks, malicious participants aim to diminish the performance of benign models by creating and disseminating the compromised model. Existing research on model poisoning attacks has predominantly concentrated on undermining global models within the Centralized FL (CFL) paradigm, while there needs to be more research in DFL. To fill the research gap, this paper proposes an innovative model poisoning attack called DMPA. This attack calculates the differential characteristics of multiple malicious client models and obtains the most effective poisoning strategy, thereby orchestrating a collusive attack by multiple participants. The effectiveness of this attack is validated across multiple datasets, with results indicating that the DMPA approach consistently surpasses existing state-of-the-art FL model poisoning attack strategies.

This paper investigates the stochastic moving target encirclement problem in a realistic setting. In contrast to typical assumptions in related works, the target in our work is non-cooperative and capable of escaping the circle containment by boosting its speed to maximum for a short duration. Considering the extreme environment, such as GPS denial, weight limit, and lack of ground guidance, two agents can only rely on their onboard single-modality perception tools to measure the distances to the target. The distance measurement allows for creating a position estimator by providing a target position-dependent variable. Furthermore, the construction of the unique distributed anti-synchronization controller (DASC) can guarantee that the two agents track and encircle the target swiftly. The convergence of the estimator and controller is rigorously evaluated using the Lyapunov technique. A real-world UAV-based experiment is conducted to illustrate the performance of the proposed methodology in addition to a simulated Matlab numerical sample. Our video demonstration can be found in the URL https://youtu.be/JXu1gib99yQ.