Reference Terms
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Random variable
A random variable is a mathematical function that maps outcomes of random experiments to numbers. It can be thought of as the numeric result of operating a non-deterministic mechanism or performing a non-deterministic experiment to generate a random result. For example, a random variable can be used to describe the process of rolling a fair die and the possible outcomes { 1, 2, 3, 4, 5, 6 }. Another random variable might describe the possible outcomes of picking a random person and measuring his or her height. Unlike the common practice with other mathematical variables, a random variable cannot be assigned a value; a random variable does not describe the actual outcome of a particular experiment, but rather describes the possible, as-yet-undetermined outcomes in terms of real numbers.
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Computers & Math News
June 9, 2025
June 8, 2025 — A team of researchers has shown that even small-scale quantum computers can enhance machine learning performance, using a novel photonic quantum circuit. Their findings suggest that today s quantum technology isn t just experimental it can already ...
June 8, 2025 — In a world where over a billion smartphones are produced yearly, a team of researchers is flipping the script on electronic waste. Instead of tossing out older phones, they ve demonstrated a groundbreaking approach: turning outdated smartphones into ...
June 7, 2025 — Unlike birds, which navigate unknown environments with remarkable speed and agility, drones typically rely on external guidance or pre-mapped routes. However, a groundbreaking development by ...
June 6, 2025 — Shrinking silicon transistors have reached their physical limits, but a team from the University of Tokyo is rewriting the rules. They've created a cutting-edge transistor using gallium-doped indium oxide with a novel "gate-all-around" structure. By ...
June 3, 2025 — The effects of artificial intelligence on adolescents are nuanced and complex, according to a new report that calls on developers to prioritize features that protect young people from exploitation, manipulation and the erosion of real-world ...
June 2, 2025 — Human-AI interactions are well understood in terms of trust and companionship. However, the role of attachment and experiences in such relationships is not entirely clear. In a new breakthrough, researchers from Waseda University have devised a ...
June 2, 2025 — Despite advances in machine vision, processing visual data requires substantial computing resources and energy, limiting deployment in edge devices. Now, researchers from Japan have developed a self-powered artificial synapse that distinguishes ...
May 30, 2025 — Students recently unveiled their invention of a robotic actuator -- the 'muscle' that converts energy into a robot's physical movement -- that has the ability to detect punctures or pressure, heal the injury and repair its damage-detecting ...
May 29, 2025 — Many policy discussions on AI safety regulation have focused on the need to establish regulatory 'guardrails' to protect the public from the risks of AI technology. Experts now argue that, instead of imposing guardrails, policymakers should demand ...
May 29, 2025 — Researchers compared their long-standing diagnostic decision support systems AI tool, DXplain, with modern large language models like ChatGPT and Gemini, finding DXplain performed slightly better. ...
May 28, 2025 — A new study integrated mathematical modeling with advanced imaging to discover that the physical shape of the fruit fly egg chamber, combined with chemical signals, significantly influences how cells ...
May 28, 2025 — Large language models (LLMs) -- the advanced AI behind tools like ChatGPT -- are increasingly integrated into daily life, assisting with tasks such as writing emails, answering questions, and even ...
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May 28, 2025 — A review of experimental research reveals how VR is best used and why it's struggled to become a megahit with ...
May 28, 2025 — Scientists have developed a unified theory for mathematical parameters known as gauge freedoms. Their new formulas will allow researchers to interpret research results much faster and with greater ...
May 28, 2025 — Physicists have unveiled a breakthrough in quantum sensing by demonstrating a 2D material as a versatile platform for next-generation nanoscale ...
May 29, 2025 — Researchers gave participants face tattoos that can track when their brain is working too hard. The study introduces a non-permanent wireless forehead e-tattoo that decodes brainwaves to measure ...
May 28, 2025 — Interactive robots should not just be passive companions, but active partners -- like therapy horses who respond to human emotion -- say ...
May 29, 2025 — Scientists have developed a powerful new tool for finding the next generation of materials needed for large-scale, fault-tolerant quantum computing. ...
May 28, 2025 — A team identified herpes virus saimiri, which infects the T cells of squirrel monkeys, as a source of proteins that activate pathways in T cells that are needed to promote T cell ...
May 28, 2025 — In a major leap forward for genetic and biomedical research, scientists have developed a powerful new artificial intelligence tool that can predict the 3D shape of chromosomes inside individual cells ...
May 28, 2025 — A new study in Nature describes both the mechanism and the material conditions necessary for superfluorescence at high ...
May 28, 2025 — Engineers have developed a multifunctional, reconfigurable component for an optical computing system that could be a game changer in ...