Reference Terms
from Wikipedia, the free encyclopedia
Web crawler
A web crawler (also known as a web spider or web robot) is a program or automated script which browses the World Wide Web in a methodical, automated manner. This process is called Web crawling or spidering. Many legitimate sites, in particular search engines, use spidering as a means of providing up-to-date data. Web crawlers are mainly used to create a copy of all the visited pages for later processing by a search engine, that will index the downloaded pages to provide fast searches. Crawlers can also be used for automating maintenance tasks on a Web site, such as checking links or validating HTML code. Also, crawlers can be used to gather specific types of information from Web pages, such as harvesting e-mail addresses (usually for spam).
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Computers & Math News
October 2, 2025
Oct. 1, 2025 — A new AI tool called DOLPHIN exposes hidden genetic markers inside single cells, enabling earlier detection and more precise treatment choices. It also sets the stage for building virtual models of cells to simulate disease and drug ...
Oct. 1, 2025 — A powerful new AI tool called Diag2Diag is revolutionizing fusion research by filling in missing plasma data with synthetic yet highly detailed information. Developed by Princeton scientists and international collaborators, this system uses sensor ...
Sep. 30, 2025 — A team of physicists has discovered that virtual charges, which exist only during brief interactions with light, play a critical role in ultrafast material responses. Using attosecond pulses on diamonds, they showed these hidden carriers ...
Sep. 28, 2025 — Diraq has shown that its silicon-based quantum chips can maintain world-class accuracy even when mass-produced in semiconductor foundries. Achieving over 99% fidelity in two-qubit operations, the breakthrough clears a major hurdle toward ...
Sep. 27, 2025 — Researchers have discovered an unusual "quantum echo" in superconducting materials, dubbed the Higgs echo. This phenomenon arises from the interplay between Higgs modes and quasiparticles, producing distinctive signals unlike conventional echoes. By ...
Sep. 27, 2025 — Researchers are showing how phone sensors can track patterns tied to a wide range of mental health symptoms. Instead of relying only on self-reports, clinicians may soon be able to gather continuous, real-world data about patients. The study also ...
Sep. 26, 2025 — Scientists have developed a lens-free mid-infrared camera using a modern twist on pinhole imaging. The system uses nonlinear crystals to convert infrared light into visible, allowing standard sensors to capture sharp, wide-range images without ...
Sep. 26, 2025 — Penn engineers have taken quantum networking from the lab to Verizon’s live fiber network, using a silicon “Q-chip” that speaks the same Internet Protocol as the modern web. The system pairs classical and quantum signals like a train engine ...
Sep. 26, 2025 — A team at the University of St Andrews has unlocked a major step toward true holographic displays by combining OLEDs with holographic metasurfaces. Unlike traditional laser-based holograms, this ...
Sep. 25, 2025 — Toxic metals are pushing infrared detector makers into a corner, but NYU Tandon researchers have developed a cleaner solution using colloidal quantum dots. These detectors are made like “inks,” allowing scalable, low-cost production while ...
Sep. 25, 2025 — Caltech scientists have built a record-breaking array of 6,100 neutral-atom qubits, a critical step toward powerful error-corrected quantum computers. The qubits maintained long-lasting superposition and exceptional accuracy, even while being moved ...
Sep. 24, 2025 — A new wearable device, a-Heal, combines AI, imaging, and bioelectronics to speed up wound recovery. It continuously monitors wounds, diagnoses healing stages, and applies personalized treatments like medicine or electric fields. Preclinical tests ...
Latest Headlines
updated 12:56 pm ET
Sep. 29, 2025 — A fresh black hole merger detection has offered the clearest evidence yet for Einstein’s relativity and Hawking’s predictions. Scientists tracked the complete cosmic collision, confirming that ...
Sep. 23, 2025 — AI-powered analysis of routine blood tests can reveal hidden patterns that predict recovery and survival after spinal cord injuries. This breakthrough could make life-saving predictions affordable ...
Sep. 22, 2025 — Meditation apps are revolutionizing mental health, providing easy access to mindfulness practices and new opportunities for scientific research. With the help of wearables and AI, these tools can now ...
Sep. 22, 2025 — Scientists have developed a new multi-layered metalens design that could revolutionize portable optics in devices like phones, drones, and ...
Sep. 21, 2025 — Researchers at UNSW have found a way to make atomic nuclei communicate through electrons, allowing them to achieve entanglement at scales used in today’s computer chips. This breakthrough brings ...
Sep. 19, 2025 — A sweeping investigation has revealed widespread fraud in mathematics publishing, where commercial metrics and rankings have incentivized the mass production of meaningless or flawed papers. The ...
Sep. 18, 2025 — Astronomers have long relied on supercomputers to simulate the immense structure of the Universe, but a new tool called Effort.jl is changing that. By mimicking the behavior of complex cosmological ...
Sep. 18, 2025 — Scientists at Michigan State University have discovered how to use ultrafast lasers to wiggle atoms in exotic materials, temporarily altering their electronic behavior. By combining cutting-edge ...
Sep. 18, 2025 — Using laser light instead of traditional mechanics, researchers have built micro-gears that can spin, shift direction, and even power tiny machines. These breakthroughs could soon lead to ...
Sep. 17, 2025 — A new AI model from NYU Abu Dhabi predicts solar wind days in advance with far greater accuracy than existing methods. By analyzing ultraviolet solar images, it could help protect satellites, ...