Electronic lock Wikipedia. This article needs to be updated. SEAMCAT is a free of charge integrated software tool based on the MonteCarlo simulation method. It permits statistical modelling of different radio interference. Any feedback from readers is welcome. This book provides a broad and applicationsoriented introduction to electromagnetic waves and antennas, with MATLAB examples. C C Programmiersprache IT C Country X. Adressierung, Land IT C Kohlenstoff Chemisches Element C Kollektor Transistor Elektronik C privater Konsum. Numerical Electromagnics Code Method of Moments NEC simulates the electromagnetic response of antennas and metal structures. Jerry Burke and A. Poggio wrote the NEC. March 2014. How does this work This data was taken from a shortlisted list of the 8 top free eBook sites out there. As this list was compiled on the day of posting. Electromagnetic lock. The most basic type of electronic lock is a magnetic lock informally called a mag lock. A large electromagnet is mounted on the door frame. Download Saras Song In this, the download of his node was received, characterized of the love by emancipation of which it found grouped well used. Please update this article to reflect recent events or newly available information. March 2. A quick demonstration of an electronic door lock. An electronic lock or electric lock is a locking device which operates by means of electric current. Electric locks are sometimes stand alone with an electronic control assembly mounted directly to the lock. Electric locks may be connected to an access control system, the advantages of which include key control, where keys can be added and removed without re keying the lock cylinder fine access control, where time and place are factors and transaction logging, where activity is recorded. Electronic locks can also be remotely monitored and controlled, both to lock and unlock. OperationeditElectric locks use magnets, solenoids, or motors to actuate the lock by either supplying or removing power. Torrent Skylark. Operating the lock can be as simple as using a switch, for example an apartment intercom door release, or as complex as a biometric based access control system. There are two basic types of locks preventing mechanism or operation mechanism. A deadbolt electronic lock mounted in a home safe. Electromagnetic lockeditThe most basic type of electronic lock is a magnetic lock informally called a mag lock. A large electro magnet is mounted on the door frame and a corresponding armature is mounted on the door. When the magnet is powered and the door is closed, the armature is held fast to the magnet. Mag locks are simple to install and are very attack resistant. One drawback is that improperly installed or maintained mag locks can fall on people,dubious discuss and also that one must unlock the mag lock to both enter and to leave. This has caused fire marshals to impose strict rules on the use of mag locks and access control practice in general. Additionally, NFPA 1. Standard for Life Safety and Security, as well as the ADA Americans with Disability Act require no prior knowledge and one simple movement to allow free egress. This means that in an emergency, a person must be able to move to a door and immediately exit with one motion requiring no push buttons, having another person unlock the door, reading a sign, or special knowledge. Other problems include a lag time delay, because the collapsing magnetic field holding the door shut does not release instantaneously. This lag time can cause a user to collide with the still locked door. Finally, mag locks fail unlocked, in other words, if electrical power is removed they unlock. This could be a problem where security is a primary concern. Additionally, power outages could affect mag locks installed on fire listed doors, which are required to remain latched at all times except when personnel are passing through. Most mag lock designs would not meet current fire codes as the primary means of securing a fire listed door to a frame. Because of this, many commercial doors this typically does not apply to private residences are moving over to stand alone locks, or electric locks installed under a Certified Personnel Program. The first mechanical recodable card lock was invented in 1. Tor Srnes, who had worked for Ving. Card since the 1. The first card lock order was shipped in 1. PHYSICS HELP. A variety of questionandanswer pages which target specific concepts and skills. Topics range from the graphical analysis of motion and drawing free. CEMC/image006.png' alt='Download Numerical Electromagnetic Code Free' title='Download Numerical Electromagnetic Code Free' />Westin Peachtree Plaza Hotel, Atlanta, US. This product triggered the evolution of electronic locks for the hospitality industry. Electronic strikeseditElectric strikes also called electric latch release replace a standard strike mounted on the door frame and receive the latch and latch bolt. Game Maker 3D Models Download Minecraft. Electric strikes can be simplest to install when they are designed for one for one drop in replacement of a standard strike, but some electric strike designs require that the door frame be heavily modified. Installation of a strike into a fire listed door for open backed strikes on pairs of doors or the frame must be done under listing agency authority, if any modifications to the frame are required mostly for commercial doors and frames. In the US, since there is no current Certified Personnel Program to allow field installation of electric strikes into fire listed door openings, listing agency field evaluations would most likely require the door and frame to be de listed and replaced. Electric strikes can allow mechanical free egress a departing person operates the lockset in the door, not the electric strike in the door frame. Electric strikes can also be either fail unlocked except in Fire Listed Doors, as they must remain latched when power is not present, or the more secure fail locked design. Electric strikes are easier to attack than a mag lock. It is simple to lever the door open at the strike, as often there is an increased gap between the strike and the door latch. Latch guard plates are often used to cover this gap. Electronic deadbolts and latcheseditElectric mortise and cylindrical locks are drop in replacements for door mounted mechanical locks. An additional hole must be drilled in the door for electric power wires. Also, a power transfer hinge is often used to get the power from the door frame to the door. Electric mortise and cylindrical locks allow mechanical free egress, and can be either fail unlocked or fail locked. In the US, UL rated doors must retain their rating in new construction doors are cored and then rated. Electrified exit hardware, sometimes called panic hardware or crash bars, are used in fire exit applications. A person wishing to exit pushes against the bar to open the door, making it the easiest of mechanically free exit methods. Electrified exit hardware can be either fail unlocked or fail locked. A drawback of electrified exit hardware is their complexity, which requires skill to install and maintenance to assure proper function. Only hardware labeled Fire Exit Hardware can be installed on fire listed doors and frames and must meet both panic exit listing standards and fire listing standards. Motor operated locks are used throughout Europe. A European motor operated lock has two modes, day mode where only the latch is electrically operated, and night mode where the more secure deadbolt is electrically operated. In South Korea, most homes and apartments have installed electronic locks, which are currentlywhen replacing the lock systems in older homes. South Korea mainly uses a lock system by Gateman. Authentication methodsedit. Simple PIN electronic lock securing an elevator. A biometric electronic lock with PIN entry. A feature of electronic locks is that the locks can deactivated or opened by authentication, without the use of a traditional physical key Numerical codes, passwords, and passphraseseditPerhaps the most common form of electronic lock uses a keypad to enter a numerical code or password for authentication. Such locks typically provide, and some feature an audible response to each press. Combination lengths are usually between 4 and 6 digits long. Security tokenseditAnother means of authenticating users is to require them to scan or swipe a security token such as a smart card or similar, or to interact a token with the lock. For example, some locks can access stored credentials on a personal digital assistant PDA or smartphone, by using infrared, Bluetooth, or NFC data transfer methods.