Stacked ranking is a performance appraisal method where employees are ranked against each other in a “stack.” In a traditional stacked ranking system, employees are ranked from best to worst on each performance dimension. The employee with the highest score on each dimension is given a “1” ranking, the employee with the second highest score … Read more
An LED light bulb is a light bulb that uses light-emitting diodes (LEDs) as its source of light. LED light bulbs are more energy-efficient and have a longer lifespan than traditional incandescent light bulbs. What are the 3 types of LED light bulbs? There are three types of LED (light-emitting diode) bulbs: standard, candelabra, and … Read more
MiFi is a brand name for a portable wireless router that acts as a mobile Wi-Fi hotspot. MiFi devices connect to the Internet via cellular networks and provide Wi-Fi access for nearby devices. MiFi devices usually have a SIM card slot, into which you insert a SIM card from your cellular service provider. Once the … Read more
The skin effect is the tendency of an alternating electric current (AC) to distribute itself within a conductor such that the current density near the surface of the conductor is greater than that at the center. The skin effect is due to the electromagnetic skin effect, which causes the current to be distributed within the … Read more
The Kyoto Protocol is an international agreement which was adopted in Kyoto, Japan in 1997. The Protocol sets binding targets for developed countries to reduce their emissions of greenhouse gases. The Protocol entered into force on 16 February 2005. As of September 2019, 191 states and the European Union have signed and ratified the Protocol. … Read more
A DNS amplification attack is a type of distributed denial of service (DDoS) attack in which attackers exploit public-facing DNS servers to amplify the size of the traffic directed at a target system. These attacks take advantage of the fact that DNS servers are typically configured to allow recursive queries from any source. In a … Read more
A cinemagraph is a still image that contains within it a minor and repeated movement, giving the illusion of a video clip. Cinemagraphs are usually created by combining a photograph with a short video clip, usually just a few seconds long. What is the difference between a GIF and a cinemagraph? A GIF is a … Read more
A non-renewable resource is a natural resource that cannot be replenished in a short period of time. This means that the resource is finite, and once it is used up, it will take a very long time for it to be available again. Non-renewable resources include fossil fuels such as coal, oil, and natural gas, … Read more
When you hear the term “rabbit hole,” it’s likely in the context of someone getting lost in a task or line of thought and spending too much time on it. The term likely comes from the 1865 novel Alice’s Adventures in Wonderland, in which Alice follows a white rabbit down a hole, and find herself … Read more
Waste heat recovery is the process of capturing and reusing the heat that is generated by industrial and commercial processes. This heat is typically wasted by being released into the atmosphere through cooling towers or vents. By capturing this heat and reusing it, businesses can improve their energy efficiency and reduce their carbon footprint. There … Read more
