What is DNA profiling?

DNA profiling, also called DNA fingerprinting, is a test to identify a person’s DNA characteristics. The DNA test is called a ‘fingerprint’, because just as it is very unlikely that any two people would have the exact, same physical fingerprint, it is also very unlikely that any two people would have exactly the same DNA information.

Only a small sample of cells is needed for DNA fingerprinting. A drop of blood or strands of hair contain enough genetic material for DNA testing. The test is used to determine whether a family relationship exists between two people. It is also used to identify organisms causing a disease. It is also a forensic technique in criminal investigations and is an important and decisive component of solving crimes. For example, DNA isolated from dried blood, saliva or hair found at a crime scene can be compared to a DNA sample collected from someone suspected of a crime, to prove his or her innocence or guilt.

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What is Green Room feature in Google meet?

Google Meet’s ‘Green Room’ feature lets you preview how you’ll appear and sound to others in a meeting. Before you join a meeting, click on the “Check your audio and video” button below the video. A pop-up window will not only show your video image, but allow you to see (and change) which microphone, speaker and camera is currently live. Click the “Next” button to record a 6-second video sample to see and hear you call quality. Your mic, speaker, camera and connection are checked and get green checkmarks if they are working. Select “Tips and Tricks” for help fixing an audio or video issue. When you’re done, click the ‘X’ in the upper-right of the window to close the Green Room, then click “Join now” to join the meeting.

This feature is available to Google Workspace Essentials, Business Starter/ Standard/ Business Plus customers, Enterprise Essentials/ Standard/ Plus customers, as well as G Suite Basic, Business, Education, Enterprise for Education, and Non-profit customers.

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What is Mini Wipebook Scan?

A cross between a whiteboard and a notebook, the Mini Wipebook Scan is meant for brainstorming, jotting down ideas, working out equations, doodling, and more. Each of its 20 double-sided pages is coated in a hypergloss film for easy erasing, offering all the functionality of a traditional notebook without the paper waste. Using the free Wipebook Scan app, you can scan and upload your work to your favourite cloud service – Google Drive, Evernote or Dropebox – before wiping the page clean. It comes with a Staedtler Lumocolor correctable marker.

Each Mini Wipebook comes packing 20 glossy-surfaced A5 sized pages, including 10 ruled lined pages and 10 graph pages. Then, using a dry erase or correctible ink pen like the included Staedtler 305F-9 Pen, simply go to work visualizing your thoughts in your own unique way.  

With the Wipebook Scan, you can fill up page after page with brilliance, file it with a click, then have a completely empty notebook to start the process all over again. And it's all with the same sense of tactile pen-and-ink work many grew up learning.

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New Audio Technique Enables ‘Super-Hearing’

It is an established fact that human beings observe what and where something is happening around them using their sense of hearing. Humans, however, have a limited range of hearing and can perceive only certain sound frequencies - generally stated to lie between 20 Hz and 20,000 Hz.

A new audio technique, developed by researchers at Aalto University, Finland, will now allow people to hear ultrasonic sources that generate sounds of frequencies over 20,000 Hz. The results, which were published in Scientific Reports early in June, also state that the technique would also allow for perception of the direction from which the sound is coming.

Listening to bats

Bats in their natural habitats were employed as the source of ultrasonic sound in this study.

Using their technique, the researchers were able to hear the direction of arrival of bat sounds, effectively allowing them to track the bats in flight as well as hear them.

While previous devices have allowed humans to listen to bats, the fact that this allows us to locate them as well is novel. They achieved this by recording the sound using an array of microphones that were mounted uniformly on a small sphere, performing a sound-field analysis and obtaining the most prominent direction from which the sound originates. Additionally, a parameter also indicates if the sound comes from a single source.

The signal thus produced is then pitch-shifted to audible frequencies and a sound is played in headphones immediately, allowing the listener to perceive the sound and the source based on the direction from which it was analysed to arrive. While the pitch-shifting was performed in a computer during the research, scientists believe that this could be achieved using electronics mounted on headphones as well.

Detect pipe leaks

Apart from the general appeal that it has for humans in the fact that it allows us to hear sounds that we normally can't, researchers also suggest practical applications. Minor pipe leaks and sometimes even damaged electrical equipment produce ultrasonic sounds that we can't hear with our ears. Their device would enable quickly detecting the location of such faulty equipment, saving valuable time.

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What is Ludo Club on Snapchat?

Snapchat launched its first Indian Snap Game, Ludo Club, a custom-made version of the popular strategy board game Ludo. The game allows users to play with their friends on Snapchat. Snapchat chose Ludo for its first Snap Game as the game was one of the most played games in India in 2020. Snap Games were developed with the idea that friends can play and chat together in real-time. The Games are available for users within the chat of the Snapchat app and users can directly play the game from the chat itself.

The Ludo Club will be available on both Android and iOS version of Snapchat. The steps will be the same for both platforms. In addition to Ludo Club, you can also play several other games such as Bitmoji paint, Aquapark Multiplayer Edition, Color Galaxy, Find My Bitmoji, Subway Surfers Airtime, and Snow Time, and more.

The company has been adding new games ever since this feature was introduced. The aim has been to drive more users which seem to be working for the brand. Snapchat has been not just focusing on board games but other features as well to enhance the user experience on its platform.

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