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Pay in person for lunch

24.10.2021

In North Ayrshire, Scotland, nine schools will begin using facial recognition to pay for lunch. As arguments for making such a decision, they called the fact that payment is made in a contactless way, and this will increase the safety of students against the backdrop of the ongoing Covid pandemic, as well as the fact that transactions will be significantly accelerated.

"In a secondary school, we have about 25 minutes to serve potentially 1000 students. So we need high throughput at the point of sale," David Swanston, managing director of CRB Cunninghams, who installed recognition systems, told the Financial Times in an interview. on the face. According to him, the system reduces the average transaction time when paying for lunch to about five seconds per student.

This is far from the first time schools in the UK have used biometric systems (some are already using fingerprint technology), but North Ayrshire will be the first to use facial recognition, which is seen as potentially a bigger privacy threat. However, Swanston noted that technology will be used that is not "live" recognition, as it does not rely on an online database. Instead, the system checks faces against an encrypted database of face templates stored on servers at schools.

The vast majority of parents and students (97%) agreed to run the recognition system, although some parents expressed concern that students were not provided with enough information to make an informed decision. They also suspect that peer pressure may have played a role for some of the students.

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Living synthetic cells created 24.09.2022

Researchers at the University of Bristol in the UK have taken a big step forward in the field of synthetic biology. Scientists have developed a system that performs several key functions of a living cell, including energy generation and gene expression.

Scientists have previously focused on getting artificial cells to perform a single function, such as gene expression, enzyme catalysis, or ribozyme activity. If scientists unlock the secret to individually creating and programming artificial cells that can more closely mimic life, it could open up a myriad of possibilities in everything from manufacturing to medicine.

While some engineers are focusing on redesigning the cells themselves, others are looking for ways to cut existing cells down to fragments that can then be redesigned into something relatively new.

To accomplish this latest bottom-up bioengineering feat, the researchers used two bacterial colonies, Escherichia coli and Pseudomonas aeruginosa. These two bacteria were mixed with empty microdroplets in a viscous liquid. One population was captured inside the drops, and the other was captured on the surface of the drops.

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In the future, this kind of synthetic cell technology could be used to improve the production of ethanol for the biofuel and food industries. In addition, such artificial cells can be programmed for photosynthesis, like purple bacteria, or for generating energy from chemicals, like sulfate-reducing bacteria do.

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