Researchers create world's smallest 'computer'
Chicago, June 23 : Researchers at the University of Michigan (UM) in the US have come out with the world's smallest "computer" -- a device measuring just 0.3 mm to a side, completely dwarfed by a grain of rice.
Unlike traditional desktops that retain their program and data with or without a power back-up, these new microdevices lose all prior programming and data as soon as they are switched off, Xinhua news agency reported.
"We are not sure if they should be called computers or not. It's more of a matter of opinion whether they have the minimum functionality required," said David Blaauw, a professor of electrical and computer engineering, who led the development of the new system.
In addition to the RAM and photovoltaics, the new micro-computing device -- Michigan Micro Mote -- has processors and wireless transmitters and receivers.
As the Motes are too small to have conventional radio antennae, they receive and transmit data with visible light. A base station provides light for power and programming, and it receives the data.
Designed as a precision temperature sensor, the new device converts temperatures into time intervals, defined with electronic pulses. The intervals are measured on-chip against a steady time interval sent by the base station and then converted into a temperature.
As a result, the computer can report temperatures in minuscule regions, such as a cluster of cells, with an error of about 0.1 degree Celsius.
The system is very flexible and could be reimagined for a variety of purposes.
The device can help in oncology research. "Since the temperature sensor is small and biocompatible, we can implant it into a mouse where cancer cells are growing," said Gary Luker, a UM professor of radiology and biomedical engineering.
"We are using this temperature sensor to investigate variations in temperature within a tumour versus normal tissue and if we can use changes in temperature to determine success or failure of therapy."
The study was presented on Thursday at the 2018 Symposia on VLSI Technology and Circuits.
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Food delivery agent intervenes to stop street fight in Delhi's Dwarka, stabbed to death
New Delhi (PTI): A 32-year-old food delivery executive was stabbed to death when he allegedly intervened in a violent altercation between two groups in southwest Delhi's Dwarka, police said on Monday.
The deceased has been identified as Govind Jha, a resident of Mohan Garden.
Three others sustained stab injuries in the incident and are currently undergoing treatment at a hospital, they said.
Authorities also cautioned against attempts to give the incident a communal colour.
According to the police, Jha was on his way to work on Sunday night when he noticed a street fight taking place at Rajapuri in Madhu Vihar area of Dwarka. The altercation involved two men pitted against three others, who were later identified as Parvesh, Anish and Rohit.
"Jha stopped at the spot and attempted to intervene. During the scuffle, the two men allegedly pulled out knives and began stabbing Parvesh, Anish and Rohit. When Jha tried to intervene, he was also attacked," a police officer said.
All four injured persons were rushed to a nearby hospital, where Jha succumbed to his injuries during treatment. The other three men are under medical observation.
Police said the accused fled the spot after the incident, and multiple teams have been formed to identify and apprehend them.
Meanwhile, Deputy Commissioner of Police (Dwarka) Kushal Pal Singh, in a statement, said that some messages circulating on social media are attempting to give a communal angle to the incident.
"In the incident, four people suffered stab injuries and were admitted to the hospital. One person died at the hospital, and the remaining three are undergoing treatment. The victims belong to two different communities. The accused stabbed all four victims. Dwarka Police is conducting a search for the accused," the DCP said.
"There is no communal angle to the incident. Strict action will be taken against those spreading false information," he said.
