While it was a bit harder to study the redder apples because the glow from the chlorophyll is harder to see, the spectrometer still performed well enough to use, the researchers said.īeyond testing for apple ripeness, Das sees a future where this technology could help with other vegetables and fruits. You push this thing into the pulp and if the fruit is more ripe, it’s easier to go in.” He added that the team chose the apple varieties they did because there is a lot of existing literature about how they ripen. “It measures the resistance of the pulp to a probe. “There’s a device called a penetrometer,” Das said. To check that the spectrometer was accurately measuring chlorophyll, the team compared the device to a commercial spectrometer, and to get an idea of how ripe the apples were, they tested the fruit’s firmness. The spectrometer was tested on three kinds of apples - Red Delicious, McIntosh and Empire - over a period of 11 days. The whole kit (including the smartphone) can be put together for under $250, according to the study. All the spectrometer’s hardware fits in a casing that is just under 3.5 inches long and 1.5 inches wide. “We wanted this to be largely open-source,” Das told Live Science. As such, the total cost of the device is low, and the computing power comes from an Arduino-based controller - a small do-it-yourself kit run by software and hardware that works with a variety of platforms. ĭas and his team made the spectrometer from parts that are commercially available, with the exception of the chip that picks up the fluorescence, which the researchers specially ordered. So, for example, the spectrometer can say an apple has been ripening for 10 days, and that means that a batch of 10-day-old apples should be shipped out before the 3-day-old ones do, and ideally, they should be sent to stores nearby. The user can then see how many days the apple has been ripening from a baseline amount. When the spectrometer picks up the light from the apple, it sends the data to an Android phone app via Bluetooth that compares it to a previous database of what an apple should be like at given stages of ripeness. (Chlorophyll breaks down into other chemicals over time.) This handheld device is designed to evaluate how ripe an apple is by measuring the glow of chlorophyll in the fruit’s skin under ultraviolet light. The riper an apple is, the dimmer the glow from the chlorophyll, the researchers said. Using entirely off-the-shelf parts, Das and his colleagues built a spectrometer that employs ultraviolet light to make the chlorophyll in the skin of an apple fluoresce. I wonder if it will happen again, now that it has happened once.As Das’ work is partly funded by the Tata Center for Technology and Design, which focuses on building for communities that don’t have access to a lot of capital for technology, he turned to open-source technologies. So for it to take close to a month for your CC to get in contact with you tells me something is going on in the background with your CC. Over the large number of years I've had various CC's, when ever one of them thinks something dodgy has taken place they have immediately blocked my account and got in contact with me. I therefore do wonder that since the recent introduction of AI systems from Google and Microsoft, I wonder if the card issuer is trying out a AI security feature that they plan to introduce across their complete system and therefore to test it they gave it a number of months worth of data to see what it would spew out and it incorrectly flagged your transaction because as some of us have pointed out, if a card issuer see's some dodgy transactions taking place, they will immediately put a block on the account and get in contact with the account holder telling them there is a potential problem. Click to expand.Looking through your posts again, what I cannot fathom is why now? Your opening post says you've used the card for a numbers of years and have had no problems and what made it even more bizarre is that the system flagged up a legitimate successful transaction.
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