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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Rahul Gandhi to join Congress padyatra in Bihar, address party workers
Patna (PTI): Leader of the Opposition in Lok Sabha, Rahul Gandhi, will join the party's ongoing 'Palayan Roko, Naukri Do' padyatra in Bihar's Begusarai district on Monday.
Later in the day, he will return to Patna from Begusarai to address the 'Samvidhan Suraksha Sammelan' (Save the Constitution Symposium). After that he will visit Sadaqat Ashram, the Bihar Congress office in Patna, to address party workers.
This will be Gandhi's third Bihar tour since January, when he had urged party workers to "inflict an ideological defeat" on the BJP in the assembly polls due later this year.
The Raebareli MP shared a minute-long video message on X on Sunday, urging the youth of Bihar to join him in the march in Begusarai wearing "white T-shirts".
"Our aim is to draw the attention of the world to the plight of Bihar's youth, who find government jobs getting scarce day by day and privatisation bringing no benefits. Let us bring the government in the state under pressure and change it," he said in the video.
Begusarai also happens to be the home district of Kanhaiya Kumar, who has been the star attraction of the padyatra, which began in East Champaran district last month.
The former JNU students' union president had unsuccessfully contested the 2019 Lok Sabha polls, on a CPI ticket, from the seat.
In the Bihar assembly polls, the Mahagathbandhan, comprising RJD, Congress and the Left, is pitted against the ruling Nitish Kumar-led NDA that also comprises the BJP.
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