A living organism is bioluminescent when it produces and emits light. Most organisms that do this live in the sea. However, there are several land insects and plants that also have bioluminescent qualities, including the firefly. The trait has typically evolved in organisms that either need to communicate with each other or lure/detect prey. How …
The term CDFS (CD File System) is used for both the Linux and Windows Operating Systems (OSs). CDFS is a file system that was created for Linux in 1999 and exports all boot images and tracks on a CD as normal files. On the Windows OS, CDFS is the driver file that is used to …
The PCL XL error is most commonly associated with HP LaserJet printers. The error occurs when several pages are sent from a document to the printer’s print queue. The printer displays this error message if the printer’s driver has become outdated or corrupted from operating system (OS) updates or conflicting third-party software being installed on …
A Cantenna is a waveguide antenna that is directional in nature, and is used to better detect or broaden a wireless network’s range. The original Cantenna was a 50 ohm resistive load that amateur radio enthusiasts used. It is a simple product that can be created with an empty Pringles can (and more recently, wider …
A Butterworth filter is a signal processing filter that has an extremely flat frequency response in the passband. It is referred to as a maximally flat magnitude filter and is commonly used in both analog and digital audio crossover filters in home, commercial, and car stereo systems. Who Invented the Butterworth Filter? British engineer, Stephen …
QSIG is a signaling protocol that is based on ISDN. It communicates signals between private branch exchanges (PBXs) within a Private Integrated Services Network (PISN) using the application-level ROSE and connection-level Q9.31 protocols. QSIG uses ISDN as the physical link layer in the exchanges and is often used in enterprise voice or integrated service networks. …
The Venturi effect is the phenomenon that occurs when a fluid that is flowing through a pipe is forced through a narrow section, resulting in a pressure decrease and a velocity increase. The effect is mathematically described through the Bernoulli equation and can be observed in both nature and industry. Many industry applications rely on …
Unfortunately, the iPhone does not yet permit printing via Blue Tooth connection. There is another option for mobile users who desire to print text messages from the iPhone, since the iPhone supports screen capture, which can be emailed to an account that the text message can be printed from. How to Print Text Messages from …
Bluejacking is a relatively new term that describes the act of sending an anonymous message to other Bluetooth equipped devices such as mobile phones, laptops, printers, cars, and Personal Data Assistants (PDAs). To date, mobile users have primarily Bluejacked others in their general proximity for friendly purposes. Bluejacking is possible because Bluetooth technology is open …
It seems as though the more daily life becomes inter-connected with the Internet, the more that our personal information is available to just about anyone who wants it. Forget about National Security Agency conspiracy theories, the real danger to keeping our private lives to ourselves are the various commercial data collection warehouses that exist throughout …