Stereotypies are repetitive movements without an apparent reason. They can be common in healthy children but can also indicate medical conditions such as autism or schizophrenia. There are different types of stereotypies, including common and complex motor stereotypies. Tics are similar to stereotypies but are preceded by a mental impulse. Stereotypies can be caused by […]
The steering wheel is connected to a steering gear that turns the car’s axles. There are different types of steering, including rack and pinion, manual, and power steering. Failure of the steering gear can cause dangerous situations. In a car, a steering wheel manages the directional movement of a vehicle. This wheel is connected to […]
A disconnector is a switch that cuts off power to electrical circuits for safety during maintenance or emergencies. It is used in power distribution, commercial activities, and homes. Lockout systems are recommended, and switches must be rated for their application. A disconnector is a switch that has the ability to cut off power to an […]
Augers are spiral-shaped tools that move materials or liquids. They have been used since ancient times, with the first design being the water screw invented by Archimedes. Modern uses include snow blowers, Zambonis, plumbers’ tools, and grain augers for moving grain into storage bins. An auger is a spiral-shaped tool that moves materials or liquids […]
Variable pricing allows different rates to be extended to different customers for the same goods or services, and is used in cultures where weighting the price of products is considered the norm or in bidding situations. It differs from fixed pricing, which extends the same price to all purchases made during a specified time period. […]
Takayasu arteritis is a rare condition that causes inflammation of the major arteries, particularly the aorta. It is most common in young women of Asian populations and can lead to life-threatening complications such as stroke and heart attack. Treatment involves medication and surgery to widen the affected artery. Takayasu arteritis refers to inflammation of the […]
Electronic instrument clusters, originally designed for spacecraft, are now found in many vehicles. They allow drivers to monitor engine function and vehicle speed without taking their eyes off the road, but can be costly to repair. An electronic instrument cluster uses digital gauges and is found on a vehicle’s dashboard. A standard instrument cluster is […]
An avocado slicer is a kitchen tool that makes cutting and peeling avocados easier, with minimal mess. They are available in plastic or metal and can be used on avocados of all sizes. Avocados are technically berries and can be ripened with bananas or refrigerated to halt the process. An avocado slicer is a kitchen […]
Injection molding is a process of melting plastic and injecting it into a mold. It offers benefits such as minimal scrap losses and minimal finishing requirements. The process uses large machines with two basic elements: the injection unit and the clamping unit. The completed part may contain extraneous pieces called runners, which are cut up […]
Window headers are thick mounts that sit at the top of the window casing, providing additional support to prevent the weight of the wall from resting on the window frame. They help maintain uniform support for the wall components and distribute the weight of the roof evenly. Window headers are typically made of the same […]
Road rage is a mental disorder that has increased in prevalence over the last decade. It can lead to dangerous incidents and even vehicular manslaughter. Defensive driving techniques and avoiding aggressive maneuvers can help prevent road rage. Laws regarding road rage incidents vary from state to state. Road rage covers a multitude of overt acts […]
The Philadelphia rod is a popular leveling rod used by surveyors, made of metal or wood with two sections that can slide to adjust reach. It is used for accurate surveying and can be graded in metric or US measurements. The construction includes a brass sleeve and removable faceplates for maintenance. A Philadelphia rod is […]
A pile cap is a reinforced concrete slab that evenly distributes the load of a group of foundation piles. It can also refer to caps placed on wooden posts to protect them from rot and birds. Piles are used as foundations for buildings with poor soil quality or steep slopes. The construction of a pile […]
The hull is the basic structure of a ship, with three main designs: displacement, planing, and semi-displacement. Each has advantages and disadvantages, with displacement being safer and more fuel efficient, planing being faster but less efficient, and semi-displacement being a compromise between the two. The hull is the basic structure of a ship, not including […]
Furnace lining is a heat-resistant layer that protects furnace parts from extreme heat during melting operations and prevents excessive heat loss. Materials include ceramic or metal/ceramic combinations, and are applied to all interior surfaces. Lining materials are chosen for their ability to withstand high temperatures, mechanical shock, abrasion, and chemical reactions. Lining methods include pouring […]
Copy testing is a marketing research process where companies review advertising material to determine its effectiveness and make necessary changes before releasing it to the public. Techniques include showing the ad to a small group and analyzing their response. The goal is to weed out ineffective ads and ensure that they are appropriate for the […]
Headers are important for structural integrity in door and window framing, required by building codes. They are hidden under walls and can become a problem during renovations. Ornamental headers can be replaced easily for a new look. A port header is built-in support on top of a port and may be known simply as a […]
Emery paper is used for metalworking, while sandpaper is used for wood. Emery paper is made by gluing abrasive mineral particles to paper, while sandpaper has a constant grain size for precision. Emery products come in different grits for different purposes and projects require different grits for desired finish. Sandpaper is a type of sandpaper […]
Zucchini boats are hollowed out and filled with various ingredients, making them a versatile and low-calorie option for parties or meals. Zucchini, also known as courgettes, are a popular ingredient in fresh vegetable dishes and can be used in breads and pies. They can be filled with different ingredients to suit various dietary preferences and […]
The aviation industry transports cargo and passengers by air, generating billions of dollars in revenue annually. It provides essential services to various industries and is primarily involved in the use and manufacture of airplanes. Air travel has revolutionized tourism and cargo transportation, with specialized companies like FedEx and UPS operating fleets of specially designed jet […]
