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The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radio navigation system owned by the United States government and operated by the United States Space Force. It is one of the global navigation satellite systems (GNSS) that provide geolocation and time information to a GPS receiver anywhere on or near the Earth where there is an unobstructed line of sight to ...
- United States
- Military, civilian
- Operational
- US Space Force
One World Trade Center. / 40.71306°N 74.01333°W / 40.71306; -74.01333. One World Trade Center, also known as One World Trade, One WTC, and formerly called the Freedom Tower during initial planning stages, [note 1] is the main building of the rebuilt World Trade Center complex in Lower Manhattan, New York City.
- April 27, 2006; 17 years ago
- 94 (+5 below ground), (28 mechanical)
- 3,501,274 sq ft (325,279 m²)
The Empire State Building is a 102-story[c] Art Deco skyscraper in the Midtown South neighborhood of Manhattan in New York City. The building was designed by Shreve, Lamb & Harmon and built from 1930 to 1931. Its name is derived from "Empire State", the nickname of the state of New York. The building has a roof height of 1,250 feet (380 m) and ...
On 14 March 2023, one of two intercepting Russian Su-27 fighters collided with an MQ-9 Reaper flying in international airspace over the Black Sea.US Air Force Gen. James Hecker, commander of the United States Air Forces in Europe – Air Forces Africa, stated, "At approximately 7:03 am (CET), one of the Russian Su-27 aircraft struck the propeller of the MQ-9, causing U.S. forces to have to ...
- Control Operations
- Components
- Alarm Handling
- PLC/RTU Programming
- Plc Commercial Integration
- Communication Infrastructure and Methods
- Architecture Development
- Security
- Uses
- See Also
The key attribute of a SCADA system is its ability to perform a supervisory operation over a variety of other proprietary devices. 1. Level 0 contains the field devices such as flow and temperature sensors, and final control elements, such as control valves. 2. Level 1 contains the industrialised input/output (I/O) modules, and their associated dis...
A SCADA system usually consists of the following main elements: Supervisory computers 1. This is the core of the SCADA system, gathering data on the process and sending control commands to the field connected devices. It refers to the computer and software responsible for communicating with the field connection controllers, which are RTUs and PLCs,...
An important part of most SCADA implementations is alarm handling. The system monitors whether certain alarm conditions are satisfied, to determine when an alarm event has occurred. Once an alarm event has been detected, one or more actions are taken (such as the activation of one or more alarm indicators, and perhaps the generation of email or tex...
"Smart" RTUs, or standard PLCs, are capable of autonomously executing simple logic processes without involving the supervisory computer. They employ standardized control programming languages such as under, IEC 61131-3 (a suite of five programming languages including function block, ladder, structured text, sequence function charts and instruction ...
Since about 1998, virtually all major PLC manufacturers have offered integrated HMI/SCADA systems, many of them using open and non-proprietary communications protocols. Numerous specialized third-party HMI/SCADA packages, offering built-in compatibility with most major PLCs, have also entered the market, allowing mechanical engineers, electrical en...
SCADA systems have traditionally used combinations of radio and direct wired connections, although SONET/SDH is also frequently used for large systems such as railways and power stations. The remote management or monitoring function of a SCADA system is often referred to as telemetry. Some users want SCADA data to travel over their pre-established ...
SCADA systems have evolved through four generations as follows: Early SCADA system computing was done by large minicomputers. Common network services did not exist at the time SCADA was developed. Thus SCADA systems were independent systems with no connectivity to other systems. The communication protocols used were strictly proprietary at that tim...
SCADA systems that tie together decentralized facilities such as power, oil, gas pipelines, water distribution and wastewater collection systems were designed to be open, robust, and easily operated and repaired, but not necessarily secure. The move from proprietary technologies to more standardized and open solutions together with the increased nu...
Both large and small systems can be built using the SCADA concept. These systems can range from just tens to thousands of control loops, depending on the application. Example processes include industrial, infrastructure, and facility-based processes, as described below: 1. Industrial processes include manufacturing, process control, power generatio...
Artificial intelligence (AI), in its broadest sense, is intelligence exhibited by machines, particularly computer systems.It is a field of research in computer science that develops and studies methods and software that enable machines to perceive their environment and uses learning and intelligence to take actions that maximize their chances of achieving defined goals.
Polestar is a Swedish automotive manufacturer that produces electric vehicles. Owned by Volvo Cars, the company is headquartered in Torslanda outside Gothenburg, Sweden.[3] Polestar produces cars in several countries including China, the US, and South Korea, in facilities owned by Volvo Cars and Geely.[4][5] The brand originated from Flash ...
