Engineering

Artificial intelligence opens new window on complex urban issues

Understanding the workings and behaviors of a city requires knowledge of the different processes that allow people and other biological organisms to live and thrive, as well as understanding of their interrelationships—many ...

Security

Payouts from insurance policies may fuel ransomware attacks

The call came on a Saturday in July delivering grim news: Many of the computer systems serving the government of LaPorte County, Indiana, had been taken hostage with ransomware. The hackers demanded $250,000.

Expert: Many Wisconsin elections clerks use outdated systems

Hundreds of local clerks are using outdated computer systems and aren't installing security patches on their current systems, leaving Wisconsin's election system vulnerable to potentially devastating cyberattacks, state elections ...

Robotics

Teaching robots what humans want

Told to optimize for speed while racing down a track in a computer game, a car pushes the pedal to the metal … and proceeds to spin in a tight little circle. Nothing in the instructions told the car to drive straight, and ...

Robotics

This assistive robot is controlled via brain-computer interface

Researchers at the University of Cassino and Southern Lazio, in Italy, have recently developed a cutting-edge architecture that enables the operation of an assistive robot via a P300-based brain computer interface (BCI). ...

Security

Microsoft alerts hospitals to fix potential security risk

Computer experts inside hospitals were working diligently on Wednesday to address a serious new security vulnerability in older versions of the Windows operating system, which is still used in many health care devices even ...

Robotics

New AI sees like a human, filling in the blanks

Computer scientists at The University of Texas at Austin have taught an artificial intelligence agent how to do something that usually only humans can do—take a few quick glimpses around and infer its whole environment, ...

Computer Sciences

Predator and prey in cyber stasis

In the world of cybersecurity, just as in nature, there are predators and there is prey. The predators are the hunters, the ones that seek out the weak and the vulnerable on which to prey, that applies whether we are talking ...

Engineering

Researchers reverse the flow of time on IBM's quantum computer

We all mark days with clocks and calendars, but perhaps no timepiece is more immediate than a mirror. The changes we notice over the years vividly illustrate science's "arrow of time"—the likely progression from order to ...

Engineering

Reinforcement learning expedites 'tuning' of robotic prosthetics

Researchers from North Carolina State University, the University of North Carolina and Arizona State University have developed an intelligent system for "tuning" powered prosthetic knees, allowing patients to walk comfortably ...

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Computer

A computer is a machine that manipulates data according to a set of instructions.

Although mechanical examples of computers have existed through much of recorded human history, the first electronic computers were developed in the mid-20th century (1940–1945). These were the size of a large room, consuming as much power as several hundred modern personal computers (PCs). Modern computers based on integrated circuits are millions to billions of times more capable than the early machines, and occupy a fraction of the space. Simple computers are small enough to fit into a wristwatch, and can be powered by a watch battery. Personal computers in their various forms are icons of the Information Age and are what most people think of as "computers". The embedded computers found in many devices from MP3 players to fighter aircraft and from toys to industrial robots are however the most numerous.

The ability to store and execute lists of instructions called programs makes computers extremely versatile, distinguishing them from calculators. The Church–Turing thesis is a mathematical statement of this versatility: any computer with a certain minimum capability is, in principle, capable of performing the same tasks that any other computer can perform. Therefore computers ranging from a mobile phone to a supercomputer are all able to perform the same computational tasks, given enough time and storage capacity.

This text uses material from Wikipedia, licensed under CC BY-SA