|
Lift Drag Graph
Lift or LIFT may refer to: Physical devices * Elevator, or lift, a device used for raising and lowering people or goods ** Paternoster lift, a type of lift using a continuous chain of cars which do not stop ** Patient lift, or Hoyer lift, mobile lift, ceiling lift, a lift to assist a caregiver for a disabled patient ** Rack lift, a type of elevator ** Ski lift, an aerial or surface lift for uphill transport ** Space elevator, a hypothetical structure for transporting material from a planet's surface into outer space ** Wheelchair lift or platform lift, a powered device to assist a person in a wheelchair * Forklift, a powered industrial truck used to lift and move materials short distances * Scissor lift, a type of aerial work platform * Body lift, an adaptation (of fixed height) to lift the automobile body from the frame * Suspension lift, a modification raising the suspension of the automobile * Stairlift, a mechanical device to help people with disabilities get up stairs * He ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elevator
An elevator (American English) or lift (Commonwealth English) is a machine that vertically transports people or freight between levels. They are typically powered by electric motors that drive traction cables and counterweight systems such as a hoist, although some pump hydraulic fluid to raise a cylindrical piston like a jack. Elevators are used in agriculture and manufacturing to lift materials. There are various types, like chain and bucket elevators, grain augers, and hay elevators. Modern buildings often have elevators to ensure accessibility, especially where ramps aren't feasible. High-speed elevators are common in skyscrapers. Some elevators can even move horizontally. History Pre-industrial era The earliest known reference to an elevator is in the works of the Roman architect Vitruvius, who reported that Archimedes ( – ) built his first elevator probably in 236 BC. Sources from later periods mention elevators as cabs on a hemp rope, powered by people o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bench Press
The bench press or chest press is a weight training exercise where a person presses a weight upwards while lying horizontally on a weight training bench. The bench press is a Compound movements, compound movement, with the primary muscles involved being the pectoralis major, the deltoid muscle, anterior deltoids, and the triceps brachii muscle, triceps brachii. Other muscles located in the back, legs and core are involved for stabilization. A barbell is generally used to hold the weight, but a pair of dumbbells can also be used. The barbell bench press is one of three lifts in the sport of powerlifting alongside the deadlift and Squat (exercise), the squat, and is the only lift in Paralympic powerlifting. The bench press is also extensively used in weight training, bodybuilding, and other types of training to develop upper body muscles, primarily the pectoralis major. To improve upper body strength, power, and endurance for athletic, occupational, and functional performance as well ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lift (web Framework)
Lift is a free and open-source web framework that is designed for the Scala programming language. It was originally created bDavid Pollakwho was dissatisfied with certain aspects of the Ruby on Rails framework. Lift was launched as an open source project on 26 February 2007 under the Apache License 2.0. A commercially popular web platform often cited as being developed using Lift is Foursquare. Design goals and overview Lift is an expressive framework for writing web applications. It draws upon concepts from peer frameworks such as Grails, Ruby on Rails, Seaside, Wicket and Django. It favors convention over configuration in the style of Ruby on Rails, although it does not prescribe the model–view–controller (MVC) architectural pattern. Rather, Lift is chiefly modeled upon the so-called "View First" (designer friendly) approach to web page development inspired by the Wicket framework. Lift is also designed to be a high-performance, scalable web framework by leveraging Sc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lift (data Mining)
Lift or LIFT may refer to: Physical devices * Elevator, or lift, a device used for raising and lowering people or goods ** Paternoster lift, a type of lift using a continuous chain of cars which do not stop ** Patient lift, or Hoyer lift, mobile lift, ceiling lift, a lift to assist a caregiver for a disabled patient ** Rack lift, a type of elevator ** Ski lift, an aerial or surface lift for uphill transport ** Space elevator, a hypothetical structure for transporting material from a planet's surface into outer space ** Wheelchair lift or platform lift, a powered device to assist a person in a wheelchair * Forklift, a powered industrial truck used to lift and move materials short distances * Scissor lift, a type of aerial work platform * Body lift, an adaptation (of fixed height) to lift the automobile body from the frame * Suspension lift, a modification raising the suspension of the automobile * Stairlift, a mechanical device to help people with disabilities get up stai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lift (soaring)
Lift is a meteorological phenomenon used as an energy source by soaring aircraft and soaring birds. The most common human application of lift is in sport and recreation. The three air sports that use soaring flight are: gliding, hang gliding and paragliding. Energy can be gained by using rising air from four sources: * Thermals (where air rises due to heat), * Ridge lift, where air is forced upwards by a slope, * Wave lift, where a mountain produces a standing wave, * Convergence, where two air masses meet In dynamic soaring it is also possible to gain energy, though this uses differences in wind speeds rather than rising air. Thermals Thermals are columns of rising air that are formed on the ground through the warming of the surface by sunlight. If the air contains enough moisture, the water will condense from the rising air and form cumulus clouds. Thermal lift is often used by birds, such as raptors, vultures and storks. Although thermal lift was known to the Wright B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lift Coefficient
In fluid dynamics, the lift coefficient () is a dimensionless quantity that relates the lift generated by a lifting body to the fluid density around the body, the fluid velocity and an associated reference area. A lifting body is a foil or a complete foil-bearing body such as a fixed-wing aircraft. is a function of the angle of the body to the flow, its Reynolds number and its Mach number. The section lift coefficient refers to the dynamic lift characteristics of a two-dimensional foil section, with the reference area replaced by the foil chord. Abbott, Ira H., and Doenhoff, Albert E. von: ''Theory of Wing Sections''. Section 1.2 Definitions The lift coefficient ''C''L is defined by :C_\mathrm L \equiv \frac = = , where L\, is the lift force, S\, is the relevant surface area and q\, is the fluid dynamic pressure, in turn linked to the fluid density \rho\,, and to the flow speed u\,. The choice of the reference surface should be specified since it is arbitrary. For e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lift (force)
When a fluid flows around an object, the fluid exerts a force on the object. Lift is the Euclidean_vector#Decomposition_or_resolution, component of this force that is perpendicular to the oncoming flow direction. It contrasts with the drag (physics), drag force, which is the component of the force parallel to the flow direction. Lift conventionally acts in an upward direction in order to counter the force of gravity, but it is defined to act perpendicular to the flow and therefore can act in any direction. If the surrounding fluid is air, the force is called an aerodynamic force. In water or any other liquid, it is called a Fluid dynamics, hydrodynamic force. Dynamic lift is distinguished from other kinds of lift in fluids. Aerostatics, Aerostatic lift or buoyancy, in which an internal fluid is lighter than the surrounding fluid, does not require movement and is used by balloons, blimps, dirigibles, boats, and submarines. Planing (boat), Planing lift, in which only the lower po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Figure Skating Lifts
Figure skating lifts are required elements in two disciplines of figure skating: pair skating and ice dance. There are five groups of lifts in pair skating, categorized in order of increasing level of difficulty. Judges look for the following when evaluating pair lifts: speed of entry and exit; control of the woman's free leg when she is exiting out of the lift, with the goal of keeping the leg high and sweeping; the position of the woman in the air; the man's footwork; quick and easy changes of position; and the maintenance of flow throughout the lift. Twist lifts are "the most thrilling and exciting component in pair skating". They can also be the most difficult movement to perform correctly. They require more strength and coordination than many other pair elements, and are usually the first or second element in a program. According to the International Skating Union (ISU), "the Woman must be caught in the air at the waist by the Man prior to landing and be assisted to a smooth la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Two Hands Anyhow
The Two Hands Anyhow is a traditional strongman weightlifting exercise. The goal was to lift as much weight overhead with two hands (two separate weights) in any method. The exercise was popular with lifters such as Arthur Saxon and Thomas Inch. The most common version of the Two Hands Anyhow had lifters bent press a barbell with the strong arm and then lift a smaller weight with the other arm, usually a kettlebell. The world record for the two hands anyhow in this style is by Arthur Saxon who used a barbell and a kettlebell. In Great Britain the lift was called the Two Hands Anyhow with Barbell and Ring-Weight, and a ring-weight or dumb-bell would be used rather than a kettlebell. Under the strict British Amateur Weight Lifters' Association rules, Ron Walker set the British Heavyweight Record in 1937 with . For a long time, this lift was the one where the record for most weight lifted overhead was achieved until Olympic Weightlifting Weightlifting (often known a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calf Raises
Calf raises are a method of exercising the triceps surae ( gastrocnemius and soleus), tibialis posterior, and peroneal muscles of the lower leg. The movement performed is plantar flexion, also called ankle extension. Bent-knee Calf raises are sometimes done with a flexed knee, usually roughly 90 degrees. This lessens the stretch in the gastrocnemius (a knee flexor), so the movement is done to emphasize the soleus. Seated Bent-knee calf raises are frequently done in a seated position for comfort. Since the weight of the upper body is rested on the seat, resistance is frequently added. Using bodyweight, one leg could be draped across the other (through external rotation) to exercise unilaterally and double the weight lifted. It can also be executed by using a weight, such as a barbell A barbell is a piece of exercise equipment used in weight training, bodybuilding, Olympic weightlifting, weightlifting, powerlifting and strongman, consisting of a long bar, usually with wei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fly (exercise)
A fly or flye is a strength training exercise in which the hand and arm move through an arc while the elbow is kept at a constant angle. Flies are used to work the muscles of the upper body. Because these exercises use the arms as levers at their longest possible length, the amount of weight that can be moved is significantly less than equivalent press exercises for the same muscles (the military press and bench press for the shoulder and chest respectively). Due to this leverage, fly exercises of all types have a large potential to damage the shoulder joint and its associated ligaments and the tendons of the muscles connecting to it. They should be done with caution and their effects first tested while using very light weights; which are gradually incremented after more strength is gained. Equipment Flies can be performed using any weight that can be held in the hand. The simplest equipment to use is a dumbbell, though the exercise can also be performed using a cable mac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
