Composite boats were sailboats built with wood planks on a wrought iron frame, providing more interior space. Copper coating on wooden boards reduced drag and weed growth. The design was strong and eliminated hogging and sagging. Brass bolts secured the planks. The composite boat was the last development of fast commercial sailing ships due to […]
An arthrometer is a diagnostic tool used by doctors and physical therapists to measure joint range of motion and ligament flexibility. It is commonly used to evaluate knee ligament problems and can be used for initial diagnosis and postoperative assessments. The accuracy of the tool depends on proper placement and the experience of the user. […]
An arthrometer is a diagnostic tool used by doctors or physical therapists to measure joint range of motion. It can be used for initial and postoperative assessments of knee ligament injuries and has sensors that record joint movement. The accuracy of the tool depends on proper placement and the experience of the user. Doctors or […]
A piston steam engine uses steam generated outside the cylinder to move a piston within a closed cylinder, converting the force into work. The first motor was invented in 1690 by Denis Papin. Precision manufacturing is important for efficiency, and the engine has been used in locomotives, ship engines, and automobiles. A piston steam engine […]
An apple splitter is a simple kitchen tool that makes it easy to slice apples and pears into segments while removing their cores, reducing the risk of foodborne illness. It has sharp blades that separate the core and handles for an easy grip. It is made of stainless steel and should be handled with care. […]
Sadeh is an ancient Iranian celebration meaning “party” and “Fire Festival”. It is celebrated on two separate days, either 100 days before or after Nowrouz or the beginning of winter. The purpose of the festival is to drive away winter and challenge Ahriman. Modern celebrations include music, dancing, traditional foods, and sometimes the slaughter of […]
Kelley Blue Book (KBB) is a reference guide that lists values for cars, trucks, and other vehicles. It’s particularly helpful when shopping for used cars, as it divides the book value of the car into several categories determined by the condition of the vehicle. The KBB is available both online and in hard copy for […]
Cross bracing is a construction technique that involves crossing braces to form an X shape to support frames, such as ship frames, furniture, walls, and floors. It strengthens any type of frame when bracing is added in sufficient places, even for large structures like ships and buildings. Cross bracing is also used in disaster-proof buildings, […]
There are approximately 86,400.002 seconds in a solar day, leading to the invention of the leap second to keep Coordinated Universal Time in sync with standard time. Leap seconds are inserted almost once a year and are more common than leap years. They are usually added on the last day of June or December and […]
Most modern cars use a uni-body construction method, where the chassis is attached to the body. The chassis includes components such as springs, struts, and A-frames, and maintenance should be performed at designated oil change intervals. Upgrading suspension components can improve vehicle handling, but may require replacing other components as well. A chassis is the […]
A cleaning plug is used to close off a drain cleaning tube and prevent debris, vermin, and dangerous fumes from entering the home. It can be difficult to remove, but a cleaning plug wrench can help. A missing plug may indicate a clogged drain or problems with the sewage system. A cleaning plug is a […]
A solenoid lock uses an electromagnetic solenoid to lock or open doors. It works by pulling the latch in the door when a button or controller is activated. The lock can be kept open for extended periods using a latching solenoid. These locks are widely used in remote security access and automotive doors. A solenoid […]
The aircraft cabin is where passengers sit during a flight and can vary in size and layout. It includes rows of seats, overhead compartments, restrooms, a kitchen, and security features. Cabin seats can be divided into different classes, with first class being the most luxurious. The cabin must be pressurized to ensure passengers can breathe […]
Attrition models analyze organizational friction, such as employee turnover or student dropouts, using mathematical modeling. Statisticians use data on attrition rates to identify patterns, assess program success, and forecast future changes. Some models contain confidential information and may be used for internal purposes only. A attrition model is a mathematical analysis of organizational friction, such […]
An amuse-bouche is a small, bite-sized appetizer that chefs serve at the beginning of a meal to please the mouth and showcase their creativity. It can be served in a variety of ways and is typically found in finer restaurants. Home cooks can also prepare their own amuse-bouche for a formal touch. A fun amuse, […]
Pipe sleeves are used in construction to keep a pipe hole open, fill the space between a pipe and another surface, or create a barrier between a pipe and the surrounding environment. They can be made from various materials and protect against odor, fire, and environmental damage. A pipe sleeve is generally one of three […]
Quality control ensures products or services meet specific requirements. A team tests products or observes services to identify issues. Quality assurance examines the process to prevent problems. Companies use quality control to evaluate employees and ensure customer satisfaction. Quality control is a process used to ensure a certain level of quality in a product or […]
A process layout organizes similar processes or machines together, while a product layout organizes equipment according to sequential steps. Designing a process layout involves needs and location analysis, followed by a block layout and a detailed layout. A process layout is more efficient for low to medium speed manufacturing and custom work. A hybrid layout […]
The A1C test measures a diabetic’s blood sugar levels over the past few months, giving an overall view of glucose control. It measures the percentage of glycated hemoglobin in the body and is recommended at least twice a year. Good control is less than 7%, with 6% being the goal for pregnant women. Consistent control […]
Systems modeling is a process used by companies to test computer models, often used to model software applications and computer hardware schematics. It helps improve productivity and identify security measures, and is documented using the systems modeling language (SysML). Modeling techniques are used by companies to simulate real-life activities. Systems modeling refers to a process […]
