R2 and R2'
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Orientation Dependence of R2' in White Matter: Digital Characterization, Modelling and Implications for Studying Brain Physiology
Introduction R2* is the transverse relaxation rate of tissue, influenced by local magnetic field inhomogeneities arising from susceptibility differences. It decomposes into R2 and R2', where R2' is the reversible component most sensitive to blood oxygenation and forms the basis of the BOLD fMRI signal. Although orientation dependence of R2 and R2* in white matter (WM) has been attributed primarily to myelin, the vascular contribution to R2' has not been systematically characterized.
Rivian is betting on its R2 EV to turn the automaker into a household name like Tesla
PARK CITY, Utah — Rivian CEO RJ Scaringe is energetic as he makes his way through displays for the electric vehicle maker's new R2 SUV. The company founder moves quickly from the EV's suspension and software systems to different models of the R2 that will soon begin to reach American consumers, including a roughly $45,000 entry-level model that Rivian said Tuesday is being pulled ahead from late 2027 to next summer. But there's an anxiousness in Scaringe's voice as he talks to employees and...
First Drive: The 2027 Rivian R2 entirely changes the EV game
Rivian provided flights from Los Angeles to Salt Lake City, Utah, and accommodation so Ars could drive the R2. Ars does not accept paid editorial content. This month, Rivian begins customer deliveries of the highly anticipated R2 model that aims to bring the startup’s aspirational adventure lifestyle to the mainstream EV market.
2027 Rivian R2 first drive: Rivian's second SUV is its best yet
2027 Rivian R2 first drive: Rivian's second SUV is its best yet It's not perfect, but Rivian's latest shows this company is playing for keeps. The Rivian R1, in both its pick 'em up R1T truck form and family-focused R1S SUV shape, has proven to be a strong statement from the plucky EV company based in Normal, IL. While sales volume and profitability still elude the startup, the original design and high quality of both those models show that this was not to be a one-and-done disaster like Fisker.
The Rivian R2 is too much fun to let drive itself
Rivian may be all in on robotaxis and autonomy, but it's still got human drivers - and EV buyers - to win over. The pricey R1S SUV and R1T pickup brought Rivian A-list media attention and cult-hit status, but the company faces a critical next step. The 2027 R2 is Rivian's bid for mainstream success, scaled-down but not dumbed down.
VulnAgent-R2: Evidence-Calibrated Multi-Agent Auditing for Repository-Level Vulnerability Detection
Announce Type: replace Abstract: Software vulnerabilities often depend on cross-file data flow, build options, framework conventions, and runtime guards, so isolated function classifiers produce fragile and poorly calibrated warnings. Repository-level LLM agents can gather richer evidence, but prior variants under-specify reproducibility, verifier behavior, baseline fairness, and statistical uncertainty. We present VulnAgent-R2, a budget-aware agentic auditing framework with three additional...
VulnAgent-R2: Evidence-Calibrated Multi-Agent Auditing for Repository-Level Vulnerability Detection
Announce Type: replace Abstract: Software vulnerabilities often depend on cross-file data flow, build options, framework conventions, and runtime guards, so isolated function classifiers produce fragile and poorly calibrated warnings. Repository-level LLM agents can gather richer evidence, but prior variants under-specify reproducibility, verifier behavior, baseline fairness, and statistical uncertainty. We present VulnAgent-R2, a budget-aware agentic auditing framework with three additional...
Rivian R2 2026: Specs, Price, Availability
For years, Rivian made one argument: Serious all-electric adventure vehicles had to cost serious money. The R1S, still one of the more capable off-roaders on any surface, starts at $75,900. The Tri Max configuration tips well past $105,000.
R2-Router: A New Paradigm for LLM Routing with Reasoning
arXiv:2602.02823v2 Announce Type: replace Abstract: As LLMs proliferate with diverse capabilities and costs, LLM routing has emerged by learning to predict each LLM's quality and cost for a given query, then selecting the one with high quality and low cost. However, existing routers implicitly assume a single fixed quality and cost per LLM for each query, ignoring that the same LLM's quality varies with its output length.
Edit-R2: Context-Aware Reinforcement Learning for Multi-Turn Image Editing
arXiv:2606.05950v1 Announce Type: new Abstract: Text-guided image editing has advanced rapidly with diffusion models and unified multimodal foundation models. However, most existing methods remain confined to single-turn settings, overlooking the more realistic scenario of multi-turn in-context editing, where users iteratively refine an image through a sequence of instructions.