Resistors can come in different sizes and shapes allowing for different voltages to go through it. However, unless the size of the resistor is large, the code is rarely written on it because it would require very tiny markings. Therefore, a system was developed to use colors to determine the resistor code. In other words, by using different colors, an average user can determine exactly what the Ohms are for the resistor. Reading Resistor Code Count the number of color bands on the resistor. For resistors with a tolerance anywhere Read More

Methyl ethyl ketone (MEK) is also known as butanone. It is a colorless liquid and has a sweet, sharp odor that smells similar to butterscotch and acetone mixed together. The compound is organic, but must be produced industrially. The substance rarely occurs naturally. Methyl ethyl ketone is primarily used as a solvent in nature. How is Methyl Ethyl Ketone Produced? The primary way to produce methyl ethyl ketone in industry is to oxidize 2-butanol using a catalyst based from bronze, zinc, or copper. Another way to produce the substance is Read More

Web analytics is the process of quantifying the behavior of a website’s visitors. Web analytics have become a very important part of e-commerce since they can show the website owner which landing pages are effective in convincing people to subscribe to services or purchase the company’s products. Web analytics can also be used to monitor and analyze how well a website is achieving its goals. Tracking Web Site Visitors through Logfile Analysis Logfile analysis is an important aspect of web analytics. By using the logfile records of web servers, the Read More

MTTR is an abbreviation for Mean Time To Recovery or Mean Time To Repair which represents the average time taken to put a defective component or system back in working order. It is a measure of the maintainability of a system and predicts the average amount of time required to get the system to work again in case of a system failure. MTTR can range from a few milliseconds, as in the case of an uninterrupted power supply (UPS) to many hours or even days in the case of application Read More

Motion Control Using NI-Motion in Ch ChNIMotion allows user programs to use the FlexMotion C library and run on the fly without compilation. It's an ideal solution for teaching and learning motion control, rapid prototyping, interactive motion control, and Web-based remote motion control. RHex Robot Control Software Libraries RHexLib is the control software library for the RHex robot (see http://ai.eecs.umich.edu/RHex for more information). It features an efficient real-time static scheduler, low level motion control tools and state machine based controller designs. Three Axis Telescope Control The threeaxis project will provide Read More

Potassium Permanganate is a crystalline compound that is dark purple in color and is used in deodorizers, dyes, disinfectants, and as an oxidizing agent. The chemical formula for potassium permanganate is KmnO4 and it is considered to be an inorganic compound. When dissolved in water, the compound makes the solution turn an intense purple color and creates a purplish-black crystal when evaporated. What Uses Does Potassium Permanganate Have? Potassium permanganate is primarily used for its oxidizing properties in industry. Since it does not generate any toxic byproducts, the compound has Read More

The Interior Gateway Routing Protocol (IGRP) is a network routing protocol that is designed to enable routing inside of an Autonomous System (AS). Cisco developed this protocol in the late 1980s in response to the existing Routing Information Protocol’s (RIP) shortcomings. As Cisco routers became more popular, a number of large networks began using IGRP, which the enhanced ITRP replaced in the early 1990s in order to improve the overall efficiency of network routing. How does the Interior Gateway Routing Protocol Work? The Interior Gateway Routing Protocol is labeled a Read More

Despite Al Gore’s claims to the contrary, the Internet was not originally invented by or created by a single person. The Internet as we know it today is a combination of a number of concepts that have ultimately been merged together to provide the service. Tim Berners-Lee (or Sir Timothy John Berners-Lee as officially known in the UK), is a British computer scientist who is credited with inventing the World Wide Web. First proposed in March 1989 and later implemented on Christmas Day, 1990 with the assistance of Robert Cailliau Read More

A laser diode is a small device that is similar in construction and appearance to a light emitting diode (LED). The main difference is that a laser diode produces coherent laser light while an LED produces incoherent light. Ever since they were first invented in 1962, millions of laser diodes have been used in a wide range of consumer and industrial products. History The first laser diode was invented by a team of researchers at General Electric in 1962 but many other research teams also contributed to their initial development. Read More

The Data Link Layer is layer two of the OSI model. It resides above the Physical Layer and below the Network Layer. The Data Link Layer is responsible for communications between adjacent network nodes. Hubs and switches operate at the Data Link Layer. The Data Link Layer is logically divided into two sub-layers: The Media Access Control (MAC) Sub-layer and the Logical Link Control (LLC) Sub-layer. Media Access Control Sub-layer The MAC Sub-layer is responsible for addressing on the Local Area Network. It also determines when nodes on a Local Read More