Technologies

Test for COVID using your phone camera? A university lab is trying it out

The method is promising and cheap, though in very early stages.

For the most up-to-date news and information about the coronavirus pandemic, visit the WHO and CDC websites.

Getting shipped a handful of free at-home COVID tests from USPS was helpful, but what if you could test yourself whenever you wanted, using your phone’s camera? Academic scientists have developed a testing method that just needs some affordable lab equipment and your smartphone, and early results suggest it’s as accurate as PCR tests.

The system, developed by University of California, Santa Barbara scientists and described in a new paper published in the journal JAMA Network Open, needs less than $100 in relatively common equipment like a hot plate, according to Gizmodo. Thereafter, each test costs only $7, making it potentially ideal for remote communities or individuals struggling to secure PCR tests.

The method is pretty simple: Download the free app developed by scientists, Bacticount, and perch your phone over the hot plate with the rear camera facing down. You’ll place your saliva into a test kit that’s on the hot plate, drop in a reactive solution that will make viral RNA more noticeable to your phone’s camera, and run the app. The solution will bond with the viral material (both COVID and the flu were tested in the study) and turn bright red, and the app will estimate the amount of viral load in the saliva based on how quickly the color reaction happened.

The system is called Smart-lamp, for smartphone «loop-mediated isothermal amplification,» which is the heat-and-solution approach used by the UCSB scientists. It’s very cheap and seems easy to set up, which is perfect for the project’s goal to satisfy a need «in low-income and middle-income countries for low-cost, low-tech, yet highly reliable and scalable testing for SARS-CoV-2 virus that is robust against circulating variants.»

But the method still needs plenty of vetting, as this initial study contained a very small sample of 50 symptomatic and asymptomatic patients in one Southern California area. In other words: Don’t expect to be able to order Bacticount-compatible kits and do your own testing soon, especially since the app has only been calibrated to work with the cameras on Samsung Galaxy S9 phones.

Still, the system is promising, and we’ve reached out to the UCSB researchers about how soon it could be authorized for public use. If it’s as accurate as initial tests suggest, its affordability and scalability could be a serious asset to testing capabilities in every country as the need for COVID testing continues into 2022.

Technologies

Netflix Stops Allowing Streaming From Phone to TV: How to Watch Now

On most TVs, you’ll now need to use the official Netflix app to watch the streaming service.

The days of using your phone as a Netflix remote are effectively over.

In a move that’s confused subscribers since reports first surfaced on Reddit in early November, Netflix appears to be blocking the ability to beam content wirelessly from phones to TVs.

CNET testing confirmed the option has vanished from newer setups, like LG TVs, though some users report that it can still be accessed via older versions of the app and legacy Chromecast dongles. A representative for Netflix didn’t immediately respond to a request for comment.

However, on a Netflix Help Center page, the company appears to be nudging customers in the direction of using built-in Netflix apps for TVs and devices.

Until Netflix clarifies why, the new rule is simple: if you want to watch on the big screen, you need to launch the app directly from the big screen.

[RANT] Netflix no long has casting support. you must now use the app directly on the streamer without your phone.
by
u/techie1980 in
Chromecast

According to the Netflix Help Center page, only those who aren’t on an ad-supported basic plan can still access the feature for older devices, such as Chromecasts. The help page explicitly mentions the few devices that still support casting with Netflix:

3rd generation or older Chromecast (no remote)
Google Nest Hub Smart Display
Certain Vizio TVs
Certain Compal TVs

If you’re thinking about bypassing the Netflix casting ban with screen mirroring, you’re probably out of luck. The Netflix help page specifically mentions that users with ad-supported plans won’t have access to «casting or mirroring,» even for old devices.

When we tried to mirror the screen of an iPhone 17 Pro running iOS 26.1 to a TCL TV, we received the following «E100» error using a Netflix Standard plan (no ads).

Netflix’s decision to end casting comes as movie and TV services (and music services such as Spotify) are steadily increasing their prices, leading some viewers to cancel streaming services to save money.

Technologies

Today’s NYT Mini Crossword Answers for Thursday, Dec. 4

Here are the answers for The New York Times Mini Crossword for Dec. 4.

Looking for the most recent Mini Crossword answer? Click here for today’s Mini Crossword hints, as well as our daily answers and hints for The New York Times Wordle, Strands, Connections and Connections: Sports Edition puzzles.

Need some help with today’s Mini Crossword? 1-Across stumped me until I filled in some more letters. Read on for the answers. And if you could use some hints and guidance for daily solving, check out our Mini Crossword tips.

If you’re looking for today’s Wordle, Connections, Connections: Sports Edition and Strands answers, you can visit CNET’s NYT puzzle hints page.

Read more: Tips and Tricks for Solving The New York Times Mini Crossword

Let’s get to those Mini Crossword clues and answers.

Mini across clues and answers

1A clue: Butterfingers
Answer: KLUTZ

6A clue: Letter before beta
Answer: ALPHA

7A clue: Like «ad hoc» or «ad hominem»
Answer: LATIN

8A clue: Prestigious university in Atlanta
Answer: EMORY

9A clue: Word drawn out in speech before «… they’re off!»
Answer: AND

Mini down clues and answers

1D clue: Dinosaur ___, vegetable so-named for its bumpy green texture
Answer: KALE

2D clue: Animal in a Peruvian herd
Answer: LLAMA

3D clue: Sinclair who wrote «The Jungle»
Answer: UPTON

4D clue: Base that’s 90 feet from home
Answer: THIRD

5D clue: Wild and funny
Answer: ZANY

Don’t miss any of our unbiased tech content and lab-based reviews. Add CNET as a preferred Google source.

Technologies

Prices Set by Algorithms: New Yorkers Now See Warnings About Stores Using Personal Data to Set Costs

This new law, already subject to lawsuits, lets shoppers know when companies are quietly raising online prices for certain types of customers.

Online shoppers in New York are now seeing a new warning on product pages thanks to consumer protection legislation that took effect in early November. Particularly noticeable during Black Friday sales were messages that told shoppers: «This price was set by an algorithm using your personal data.»

This piece of legislation requires companies (with exceptions for rideshare apps) to show buyers when they use surveillance pricing to set online prices, potentially raising costs for some people while lowering them for others.

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So what data are these companies collecting to shift prices? Well, unlike surge pricing, this type of algorithm pricing calculates data related to the individual person or device. That could include the type of device (Android versus iPhone, etc.), your account’s browsing history, recent purchases made from that browser and — most importantly — your location.

In other words, reported examples have shown that items like eggs will increase in cost for wealthy neighborhoods while staying at lower standard costs for less prosperous zones. But it can get far more complicated than that: Some pricing algorithms study millions of online purchases to predict buyer patterns.

A representative for the New York Senate didn’t immediately respond to a request for comment.

Is surveillance pricing legal?

So far, yes. What laws like this New York legislation do is enforce transparency about what may be affecting prices, instead of banning it. And even that was too much for business groups, which immediately sued to block the law in federal court, alleging that it violates the businesses’ First Amendment rights.

It’s not clear whether companies are complying with the law as directed, or what it fully entails, either. The bill requires «clear and conspicuous disclosure» near the price, but some companies appear to be putting the information in a harder-to-spot area behind an information icon at the bottom of a pop-up.

Efforts to control pricing via algorithm

New York isn’t the only state to tackle surveillance pricing. Other states and cities are entertaining similar legislation, as well as complete bans on the practice. But it’s an uphill battle due to the many details and strong pushback from, well, every industry that sells products online.

The most recent example was from September, when California’s congress went through its proposed ban on surveillance pricing and cut out nearly everything. In its current state, the California law would only apply to grocery prices, which is still not a common online purchase. Colorado, Illinois and other states are also working on their own versions of related laws.

The question of whether shoppers would appreciate transparency laws, or whether they’d be less likely to purchase products if they knew the price was based on their personal data, is tough to answer (what if the algorithms are giving you a lower price than other nearby shoppers?). But the privacy question has a more far-reaching impact: Once shoppers see how much of their personal data is being harvested for pricing, they may start to wonder what else it’s being used for.