Category: Science and Technology
What does the ‘Score validation’ feature of Google reCAPTCHA’s human verification mean?
reCAPTCHA is a verification system developed by Google to determine whether website visitors are humans or automated programs.
What are DKIM and SPF used for?
DKIM (DomainKeys Identified Mail) and SPF (Sender Policy Framework) are two technologies used for email authentication.
How to train knife sharpening technique?
Knife sharpening is a handicraft skill that requires much practice and honing to master. If you want to learn sharpening techniques, there are some steps you can follow systematically
How to Identify Fraud in Online Communities
A common question with Facebook, Instagram, Twitter, and Discord is “How to identify scam accounts in online communities? On Facebook, Instagram, Twitter, Discord and other social media, some strangers often come to add friends and follow, and occasionally mention “contact”, “model”, “investment”, “dream”, “funding”, “bonus” , “legitimate”, “opportunity”, “business opportunity”, “development”, “partners” these keywords are…
Should the micro switch of the mouse button be made in Japan or the People’s Republic of China?
A frequently asked question about mouse repairs is “Should the microswitches of the mouse buttons be made in Japan or the People’s Republic of China?” A mouse is cheap from more than 100 yuan to several thousand yuan. The biggest difference is in key design such as feel, ergonomics, appearance structure and motion detection resolution,…
What circuit design issues need to be paid attention to when using PWM to control a motor?
A common question with circuit design is “What should I pay attention to when controlling a motor with Pulse-width modulation (PWM)?” If you want to use PWM to control the motor action, it is generally referred to as a DC motor. If you want to use a relay to control it, it will definitely not…
Why do airplane windows have rounded corners?
A common question related to aviation equipment is: “Why are the windows in the bulkheads of airplanes rounded?” When traveling by plane, I like to look out at the blue sky and sea through the lovely round windows in the cabin. But in addition to its own aesthetic effect, what is the special reason for…
What are the professional cameras and cameras that support the ProResRAW recording format?
Apple first released ProRes HQ, the boss of the Apple ProRes series, in 2007. Up to the technological development of the latest generation of ProResRAW today, ProRes encoding has been accepted by mainstream film creation teams all over the world (including Hollywood, USA), and the encoder format and variety have also been expanded very richly.…
When does the router DMZ host service need to be used?
Question: “Generally, when a computer connects to the Router, it will be assigned an intranet ip location, so why do you need the DMZ function?”
