Sea ice plays a critical role in the global climate system and maritime operations, making timely and accurate classification essential. However, traditional manual methods are time-consuming, costly, and have inherent biases. Automating sea ice type classification addresses these challenges by enabling faster, more consistent, and scalable analysis. While both traditional and deep learning approaches have been explored, deep learning models offer a promising direction for improving efficiency and consistency in sea ice classification. However, the absence of a standardized benchmark and comparative study prevents a clear consensus on the best-performing models. To bridge this gap, we introduce \textit{IceBench}, a comprehensive benchmarking framework for sea ice type classification. Our key contributions are threefold: First, we establish the IceBench benchmarking framework which leverages the existing AI4Arctic Sea Ice Challenge dataset as a standardized dataset, incorporates a comprehensive set of evaluation metrics, and includes representative models from the entire spectrum of sea ice type classification methods categorized in two distinct groups, namely, pixel-based classification methods and patch-based classification methods. IceBench is open-source and allows for convenient integration and evaluation of other sea ice type classification methods; hence, facilitating comparative evaluation of new methods and improving reproducibility in the field. Second, we conduct an in-depth comparative study on representative models to assess their strengths and limitations, providing insights for both practitioners and researchers. Third, we leverage IceBench for systematic experiments addressing key research questions on model transferability across seasons (time) and locations (space), data downscaling, and preprocessing strategies.

Multimodal large language models (MLLMs) are critical for developing general-purpose AI assistants, yet they face growing safety risks. How can we ensure that MLLMs are safely aligned to prevent undesired behaviors such as discrimination, misinformation, or violations of ethical standards? In a further step, we need to explore how to fine-tune MLLMs to enhance reasoning performance while ensuring they satisfy safety constraints. Fundamentally, this can be formulated as a min-max optimization problem. In this study, we propose Safe RLHF-V, the first multimodal safety alignment framework that jointly optimizes helpfulness and safety using separate multimodal reward and cost models within a Lagrangian-based constrained optimization framework. Given that there is a lack of preference datasets that separate helpfulness and safety in multimodal scenarios, we introduce BeaverTails-V, the first open-source dataset with dual preference annotations for helpfulness and safety, along with multi-level safety labels (minor, moderate, severe). Additionally, we design a Multi-level Guardrail System to proactively defend against unsafe queries and adversarial attacks. By applying the Beaver-Guard-V moderation for 5 rounds of filtering and re-generation on the precursor model, the overall safety of the upstream model is significantly improved by an average of 40.9%. Experimental results demonstrate that fine-tuning different MLLMs with Safe RLHF can effectively enhance model helpfulness while ensuring improved safety. Specifically, Safe RLHF-V improves model safety by 34.2% and helpfulness by 34.3%. All of datasets, models, and code can be found at https://github.com/SafeRLHF-V to support the safety development of MLLMs and reduce potential societal risks.

Composed image retrieval (CIR) enables users to search images using a reference image combined with textual modifications. Recent advances in vision-language models have improved CIR, but dataset limitations remain a barrier. Existing datasets often rely on simplistic, ambiguous, or insufficient manual annotations, hindering fine-grained retrieval. We introduce good4cir, a structured pipeline leveraging vision-language models to generate high-quality synthetic annotations. Our method involves: (1) extracting fine-grained object descriptions from query images, (2) generating comparable descriptions for target images, and (3) synthesizing textual instructions capturing meaningful transformations between images. This reduces hallucination, enhances modification diversity, and ensures object-level consistency. Applying our method improves existing datasets and enables creating new datasets across diverse domains. Results demonstrate improved retrieval accuracy for CIR models trained on our pipeline-generated datasets. We release our dataset construction framework to support further research in CIR and multi-modal retrieval.

Distributed Denial of Service attacks represent an active cybersecurity research problem. Recent research shifted from static rule-based defenses towards AI-based detection and mitigation. This comprehensive survey covers several key topics. Preeminently, state-of-the-art AI detection methods are discussed. An in-depth taxonomy based on manual expert hierarchies and an AI-generated dendrogram are provided, thus settling DDoS categorization ambiguities. An important discussion on available datasets follows, covering data format options and their role in training AI detection methods together with adversarial training and examples augmentation. Beyond detection, AI based mitigation techniques are surveyed as well. Finally, multiple open research directions are proposed.

Adopting AI copilots in professional workflows presents opportunities for enhanced productivity, efficiency, and decision making. In this paper, we present results from a six month trial of M365 Copilot conducted at our organisation in 2024. A qualitative interview study was carried out with 27 participants. The study explored user perceptions of M365 Copilot's effectiveness, productivity impact, evolving expectations, ethical concerns, and overall satisfaction. Initial enthusiasm for the tool was met with mixed post trial experiences. While some users found M365 Copilot beneficial for tasks such as email coaching, meeting summaries, and content retrieval, others reported unmet expectations in areas requiring deeper contextual understanding, reasoning, and integration with existing workflows. Ethical concerns were a recurring theme, with users highlighting issues related to data privacy, transparency, and AI bias. While M365 Copilot demonstrated value in specific operational areas, its broader impact remained constrained by usability limitations and the need for human oversight to validate AI generated outputs.

Tesla Chief Executive Elon Musk told employees to hold on to their stock and stay optimistic amid a series of blows to his company's reputation that have sent shares plunging. Since Musk began his prominent role in the Trump administration in January, Tesla stock has taken a hit as protests against the electric vehicle brand have erupted across the country. Tesla shares rose 5% Friday to close at 248.71 but have dropped 34% this year. With Chief Executive Elon Musk playing a prominent role in the Trump administration, many Tesla drivers are no longer happy about supporting the car brand. Tesla vehicles, dealerships and charging stations have become targets for vandalism as distaste grows for Musk and his Department of Government Efficiency, or DOGE.

In his address to a joint session of Congress, the president predicted that "our country is on the verge of a comeback the likes of which the world has never witnessed." That prediction is backed up by his recent announcements of massive new private sector investments in AI infrastructure and new executive orders to ensure that the U.S. leads the world in the industries of the future. In order to fulfill the promise that those actions suggest, however, it's essential that President Donald Trump support steps to shore up America's intellectual property system, the cornerstone of our innovation economy, rooting out malicious foreign interests and installing new leadership to help guide the comeback. To start, we need to address the fact that legal damages for patent infringement are no longer calculated reliably. U.S. courts have strayed from commonsense assessments to the detriment of American innovation.

"When not wasting money on bureaucracy," he wrote, "The Department of Education has been funding anti-Americanism, gender nonsense and anti-meritocratic racism." By the end of the month, the department had been stripped to the bone, dismantled by Donald Trump and Musk's DOGE. And on Thursday, Education Secretary Linda McMahon, who has said her agency's "final mission" would be to send education programs "back to the states," was on hand as the president signed an executive order to begin eliminating what remained of the department. The companies' founders share an admiration for Musk and desire to help their students replicate his success. At the same time that federal support for public education is imperiled, two private online education programs whose seeds were planted with Musk and SpaceX are getting a second wind.

Over the last four years at the United Nations, the international community has witnessed an alarming trend of closer collaboration between Russia and China that poses a significant threat to the "rules-based order" the United States helped design back in 1945. This increased and renewed level of cooperation presents an unprecedented dilemma for the United States and like-minded partners: how to maintain the existing order, warts and all, when two permanent members of the UN Security Council are now working feverishly to subvert it. To many UN observers, China and Russia have now come to the shared conclusion that the UN has become a tool Washington and its allies regularly use to destabilize their regimes and diminish their global influence. Consequently, the United Nations has become a critical battleground in the current era of "Great Power" competition. During my two-plus years as the U.S. ambassador responsible for UN Security Council matters, I have seen first-hand at the UN how these two authoritarian powers repeatedly and energetically spread falsehoods alleging: U.S. Ambassador to the Conference on Disarmament Robert Wood attends a news conference at the United Nations in Geneva, Switzerland, April 19, 2018.

Two high school graduates who say they can't read or write are suing their respective public school systems, arguing they were not given the free public education to which they are entitled. Cornell Law School Professor William A. Jacobson, director of the Securities Law Clinic, told Fox News Digital the lawsuits signify a "much deeper problem" with the American public school system. "I think these cases reflect a deeper problem in education. For each of these cases, there are probably tens of thousands of students who never got a proper education -- they get pushed along the system," Jacobson said. "Unfortunately … we've created incentives, particularly for public school systems, to just push students along and not to hold them accountable."