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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Two die, six injured as wall of house collapses in Bihar
Aurangabad (Bihar) (PTI): Two persons were killed and six others injured after the wall of a house collapsed on them in Bihar’s Aurangabad district, police said on Sunday.
The deceased have been identified as Akhileshwar Yadav (55) and Satyanarayan Yadav (65), a senior officer said.
The incident took place on Saturday night when the people had gathered to watch a wedding ceremony in the Obra area, he said.
According to villagers, the wall of a house where the wedding ceremony was going on suddenly collapsed on them, Obra Police Station SHO Nitish Kumar said.
A police team reached the spot after receiving the information, the SHO said.
"Two died on the spot, and the six injured were immediately taken to the nearest government hospital. Their condition is stated to be out of danger," the station house officer said.
The bodies were sent for the post-mortem examinations, said the SHO, adding that the matter was being examined.
