We present ChatR1, a reasoning framework based on reinforcement learning (RL) for conversational question answering (CQA). Reasoning plays an important role in CQA, where user intent evolves across dialogue turns, and utterances are often underspecified, requiring contextual interpretation, query reformulation, and dynamic coordination between retrieval and generation. Unlike static `rewrite, retrieve, and generate' pipelines, ChatR1 interleaves search and reasoning across turns, enabling exploratory and adaptive behaviors learned through RL. To address the challenge of sparse and delayed rewards in RL, we propose an intent-aware reward that provides turn-level feedback by aligning retrieval and reasoning with evolving user goals. Our proposed ChatR1 demonstrates strong performance on both 3B and 7B model backbones, outperforming competitive models on five CQA datasets, measured by different metrics (F1, BERTScore, and LLM-as-judge). We include a diverse set of CQA datasets to cover topic shifts, evolving intents, mixed-initiative dialogues, and multi-document grounding, testing ChatR1's performance from various aspects. Ablation studies confirm the effectiveness of the intent-aware reward. Our analyses further reveal diverse reasoning trajectories and effective use of the search tool. ChatR1 also generalizes robustly across domains, demonstrating that RL-based reasoning enables more flexible and context-sensitive behavior than static CQA pipelines.

Christmas is a time characterized by family, food and looking to the future. But the traditional festive meal might soon start to look a bit different, according to experts. Scientists at UK Research and Innovation (UKRI) have come up with a'Christmas dinner of the future', boasting seaweed-fed pigs in blankets, turkey accompanied by'alternative' protein and genetically engineered'super spuds'. Their predictions are based on a range of projects they currently fund across the country. Innovations like these, they say, will keep food that is tasty, nutritious, affordable and healthy on the table for generations to come.

Ask any American what their favorite part of a Christmas dinner is and you'll here a wide range of answers. Many families see the turkey or roast ham as the true centerpiece of the meal, while others drool over side dishes like stuffing, mashed potatoes or green beans. And the star of the show was rather surprising. Ask any American what their favorite part of a Christmas dinner is and you'll here a wide range of answers. But we didn't ask any American, we asked AI In most cognitive tests, Bard outperforms GPT-4, which powers ChatGPT. Microsoft's bot can tell users when an omelet is cooked, suggest the best design for a paper airplane or help a football player improve their skills.

It's a meal that many of us look forward to all year. But what exactly are the best items in a British Christmas Dinner? While many of us see the Roast Turkey, Goose or Ham as the main event, others prefer the trimmings, whether it's pigs in blankets, stuffing, or even Brussels Sprouts. With just 10 days to go before we get to devour our Christmas Dinner, MailOnline asked ChatGPT to rank the elements on the meal. So, do you agree with the AI chatbot's ranking? To get to the bottom of the Christmas Dinner ranking, MailOnline simply asked ChatGPT: 'How do you rank the elements of a British Christmas dinner?' Within seconds, the AI bot began to reply, diplomatically stating that'the ranking of elements can vary based on personal preferences and regional traditions.'

When I spoke to my phone, my face appeared on the screen, and I said, 'Hi, my name is Robert, and I'm looking forward to telling you about my life.' I was talking to an AI avatar of myself, designed to allow people to'live on' after death so that relatives can talk to them and learn about their lives. My wife's reaction to my AI clone was absolute horror, as she simply said, 'My God, why?' The clone comes courtesy of a'digital afterlife' service, Hereafter.AI, part of a wave of AI-powered'grief tech' created by programmer James Vlahos after his father died of cancer in 2016. The service creates a'Legacy Avatar' that can live on after your death (Rob Waugh/Hereafter) Vlahos programmed a'Dadbot' while his father was still alive, recording his responses to questions - and Hereafter's service now uses AI to make it easier to interact. Science has unearthed several distinct patterns around when people tend to die.

Yet the price of such systems is likely to drop, says Julia Segal, senior strategist at US food consultancy The Culinary Edge: "Many of these technologies start well out of reach of the average home cook. However, as the technologies continue to proliferate, costs will eventually come down."

Astronauts aboard the International Space Station have a treat to look forward to after successfully taking delivery of their Christmas dinner. The three-strong team will be treated to smoked turkey, a green bean casserole, candied yams, cranberry sauce and fruitcake. The delivery was sent via Elon Musk's SpaceX Dragon capsule and was received by Commander Alexander Gerst. Musk's astro-firm SpaceX worked with NASA to ship the delivery, which also included shortbread and biscuits with tubes of icing for decoration. In addition to the food the Dragon delivered 40 mice and 36,000 worms for a science experiment and more than 5,000 pounds of other station equipment.

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