These boats tend to be limited to 5,000 horsepower (3,728 kW). But can you predict what you would see on the dial of a bathroom scale if you stood on it during an elevator ride? They can be classified as follows: Conventional tugs use a tow line, also known as a hawser to pull big vessels (Photo Credit : Nightman1965/Shutterstock). Its primary job is to assist large ships during maneuvering and docking operation. The directions and magnitudes of acceleration and the applied forces are given in Figure 4.21(a). . NT5A-RT3: TUGBOAT PUSHING BARGES-FORCE TUGBOAT EXEATS ON LEAD BARGE In each of the six figures below a tugboat is pushing two barges. The tow boat is the stern of the vessel, and the front barge is the bow. This makes them agile and more suited to handling container vessels. The biggest drawback of this system is that it is unidirectional, making it difficult to change course easily. The whole tow, excluding the towboat, can easily be over 1,200 feet (370m) long and 200 feet (61m) wide, covering over 6 acres (2.4ha) and holding thousands of tons of cargo. A second barge with a mass of 12 000 kg is attached to the first barge with cable #2. Otherwise, dumb barges must be towed by tugs, or pushed by pusher boats. A tugboat is attached to a barge of mass 5100 kg with cable #1. . Towing provides less navigational control, as the barge may wander from side to side. An example of habour tugboat is given in Figure 3. From Figure 4.21(b), we can see that. A barge is pulled by the two tugboats shown in the following figure. What are Tug Boats - Different Types And Uses. While tug boats can be used for a variety tasks like pushing barges or assisting with docking maneuvers, one of . HOMER HOMER software is a tool that is used to design a, Liquefied natural gas (LNG) industry is able to deliver these remote gas, One of the confusing questions about solar panels among the public is,, The method of exergy can be used to specify and quantify exergy, Sphingolipid Metabolism Sphingolipids are the major structural components of the, Acute lymphoblastic leukemia (ALL) occurs as a result of abnormal accumulation of the, Male reproductive cells are called sperm. A towboat actually has a confusing name. An example of seagoing tugboat is given in Figure 1. The tugboat pushes against a barge. While they are quite powerful and can push multiple barges connected together, their hull design makes them dangerous in oceanic settings. While indirect towing involves pushing only for course correction, certain vessels must be pushed all the way, it being their only means of propulsion. Save my name, email, and website in this browser for the next time I comment. Giu 11, 2022 | how to calculate calories per serving in a recipe. Lets find out! https://openstax.org/books/college-physics-2e/pages/1-introduction-to-science-and-the-realm-of-physics-physical-quantities-and-units, https://openstax.org/books/college-physics-2e/pages/4-7-further-applications-of-newtons-laws-of-motion, Creative Commons Attribution 4.0 International License. Our mission is to improve educational access and learning for everyone. May 26, 2020. sweden, stockholm, lake malaren, tugboat pushing barge, city in background - tugboat pushing barges stock pictures, royalty-free photos & images Tug boat pushes a barge down the East River and out in the bay on November 3, 2017 in New York City. Can Airplanes Taxi To The Runway On Their Own Power? Larger vessels berth at ports assisted by tugboats, as unpredictable movement in the water can result in heavy damages (Photo Credit : CANARAN/Shutterstock). are licensed under a, Further Applications of Newtons Laws of Motion, Introduction: The Nature of Science and Physics, Introduction to Science and the Realm of Physics, Physical Quantities, and Units, Accuracy, Precision, and Significant Figures, Introduction to One-Dimensional Kinematics, Motion Equations for Constant Acceleration in One Dimension, Problem-Solving Basics for One-Dimensional Kinematics, Graphical Analysis of One-Dimensional Motion, Introduction to Two-Dimensional Kinematics, Kinematics in Two Dimensions: An Introduction, Vector Addition and Subtraction: Graphical Methods, Vector Addition and Subtraction: Analytical Methods, Dynamics: Force and Newton's Laws of Motion, Introduction to Dynamics: Newtons Laws of Motion, Newtons Second Law of Motion: Concept of a System, Newtons Third Law of Motion: Symmetry in Forces, Normal, Tension, and Other Examples of Forces, Extended Topic: The Four Basic ForcesAn Introduction, Further Applications of Newton's Laws: Friction, Drag, and Elasticity, Introduction: Further Applications of Newtons Laws, Introduction to Uniform Circular Motion and Gravitation, Fictitious Forces and Non-inertial Frames: The Coriolis Force, Satellites and Keplers Laws: An Argument for Simplicity, Introduction to Work, Energy, and Energy Resources, Kinetic Energy and the Work-Energy Theorem, Introduction to Linear Momentum and Collisions, Collisions of Point Masses in Two Dimensions, Applications of Statics, Including Problem-Solving Strategies, Introduction to Rotational Motion and Angular Momentum, Dynamics of Rotational Motion: Rotational Inertia, Rotational Kinetic Energy: Work and Energy Revisited, Collisions of Extended Bodies in Two Dimensions, Gyroscopic Effects: Vector Aspects of Angular Momentum, Variation of Pressure with Depth in a Fluid, Gauge Pressure, Absolute Pressure, and Pressure Measurement, Cohesion and Adhesion in Liquids: Surface Tension and Capillary Action, Fluid Dynamics and Its Biological and Medical Applications, Introduction to Fluid Dynamics and Its Biological and Medical Applications, The Most General Applications of Bernoullis Equation, Viscosity and Laminar Flow; Poiseuilles Law, Molecular Transport Phenomena: Diffusion, Osmosis, and Related Processes, Temperature, Kinetic Theory, and the Gas Laws, Introduction to Temperature, Kinetic Theory, and the Gas Laws, Kinetic Theory: Atomic and Molecular Explanation of Pressure and Temperature, Introduction to Heat and Heat Transfer Methods, The First Law of Thermodynamics and Some Simple Processes, Introduction to the Second Law of Thermodynamics: Heat Engines and Their Efficiency, Carnots Perfect Heat Engine: The Second Law of Thermodynamics Restated, Applications of Thermodynamics: Heat Pumps and Refrigerators, Entropy and the Second Law of Thermodynamics: Disorder and the Unavailability of Energy, Statistical Interpretation of Entropy and the Second Law of Thermodynamics: The Underlying Explanation, Introduction to Oscillatory Motion and Waves, Hookes Law: Stress and Strain Revisited, Simple Harmonic Motion: A Special Periodic Motion, Energy and the Simple Harmonic Oscillator, Uniform Circular Motion and Simple Harmonic Motion, Speed of Sound, Frequency, and Wavelength, Sound Interference and Resonance: Standing Waves in Air Columns, Introduction to Electric Charge and Electric Field, Static Electricity and Charge: Conservation of Charge, Electric Field: Concept of a Field Revisited, Conductors and Electric Fields in Static Equilibrium, Introduction to Electric Potential and Electric Energy, Electric Potential Energy: Potential Difference, Electric Potential in a Uniform Electric Field, Electrical Potential Due to a Point Charge, Electric Current, Resistance, and Ohm's Law, Introduction to Electric Current, Resistance, and Ohm's Law, Ohms Law: Resistance and Simple Circuits, Alternating Current versus Direct Current, Introduction to Circuits and DC Instruments, DC Circuits Containing Resistors and Capacitors, Magnetic Field Strength: Force on a Moving Charge in a Magnetic Field, Force on a Moving Charge in a Magnetic Field: Examples and Applications, Magnetic Force on a Current-Carrying Conductor, Torque on a Current Loop: Motors and Meters, Magnetic Fields Produced by Currents: Amperes Law, Magnetic Force between Two Parallel Conductors, Electromagnetic Induction, AC Circuits, and Electrical Technologies, Introduction to Electromagnetic Induction, AC Circuits and Electrical Technologies, Faradays Law of Induction: Lenzs Law, Maxwells Equations: Electromagnetic Waves Predicted and Observed, Introduction to Vision and Optical Instruments, Limits of Resolution: The Rayleigh Criterion, *Extended Topic* Microscopy Enhanced by the Wave Characteristics of Light, Photon Energies and the Electromagnetic Spectrum, Probability: The Heisenberg Uncertainty Principle, Discovery of the Parts of the Atom: Electrons and Nuclei, Applications of Atomic Excitations and De-Excitations, The Wave Nature of Matter Causes Quantization, Patterns in Spectra Reveal More Quantization, Introduction to Radioactivity and Nuclear Physics, Introduction to Applications of Nuclear Physics, The Yukawa Particle and the Heisenberg Uncertainty Principle Revisited, Particles, Patterns, and Conservation Laws, (a) A view from above of two tugboats pushing on a barge. The uncertainty of movement due to water currents in narrow areas, such as harbors and ports, leave little room for course correction. (a) The various forces acting when a person stands on a bathroom scale in an elevator. "Or a 567 . A potential down-side on relying on the Tug Form for Towing Liability comes when the Tug/Push boat in question has a low Hull limit (such as a $50,000 tug boat moving an $800,000 barge; the Tug Form will only cover damages up to $50,000). $100. They are still serving all the world ports successfully. A soccer player starts from rest and accelerates forward, reaching a velocity of 8.00 m/s in 2.50 s. (a) What was his average acceleration? This arrangement provides more manoeuvring capability during towing operations and maximum efficiency in harbour ship handling. Aerial view of tugboat in leaving port for pilotting. The standard American Institute Tug Form provides this coverage up to the Tug/Push boat's Hull limit. The different types of tugboats propulsion system or different configurations of tugboats propulsion systems can provide higher power with fewer energy consumptions. 1 This next photo shows a typical tug boat designed for use in harbors, bays, and near coastal waters. If these are available for the specific topic, you should refer to them. Creative Commons Attribution License Bump. These boats, known as tugs or tugboats, serve several important functions. These tugs are either independent of, or attached to the barge by means of an articulated mechanism. The barge is pulled by a tugboat, which is attached to the front of the barge via a towline. In addition, the arrangement does not generate enough thrust to handle modern container and cruise ships, which has rendered this obsolete. Due to the nature of the payload on barges, it is easier to push, rather than tow them. This book uses the Image credit: U.S. Coast Guard. The fundamental difference between the conventional and ASD tugboats is the manoeuvring system. The mass of the barge is 7.0 106 kg and its acceleration is observed to be 7 x 102 m/s2 in the direction shown. Barges therefore have a notch in their body that accommodates a dedicated barge tug. A standard barge is 200 feet long, 35 feet wide, and when loaded to its 1500-ton capacity needs a nine-foot depth of water to float. Can We Really Build Cars That Run Only On Water? You will find these techniques for integrated concept problems useful in applications of physics outside of a physics course, such as in your profession, in other science disciplines, and in everyday life. The first tugboat exerts a force of 2.7105 N2.7105 N in the x-direction, and the second tugboat exerts a force of 3.6105 N3.6105 N in the y-direction. Assume + y is straight ahead . The largest towboat is the long-distance towboat which can operate without refueling for 20-30 days. Tug boat and barges on the Mississippi River. Tugboats are generally classified according to their work duties and the characteristics of the waters in which they operate. Aerial view of a tugboat. Barge with notch in the stern to accommodate the tug (Photo Credit : Khrushchev Georgy/Shutterstock). What about when the elevator moves upward at a constant speed: will the scale still read more than your weight at rest? The journey begins on a muggy afternoon in July, when Jenkins's captain, Pat Deckard, steers a 2,520-horsepower towboat, the Vidalia Dock, out of the Harahan Launch. Have you ever wondered why tug boats push their barges instead of pulling them? In pursuit of cleaner and more environmentally conscious shipping, internal combustion rigs are now being replaced by electrical equivalents. but the question didn't say. Due to the nature of the payload on barges, it is easier to push, rather than tow them. So next time you see a tug boat pushing a barge, now you know why! Tugboats with reinforced hulls are deployed on ice sheets to precede bigger vessels (Photo Credit : wiklander/Shutterstock). ifsi virtual learning. Cornell Maritime Press, Russell P. A., Jackson L.,& Morton T. D. (2018). The tires cushion the impact when the hull accidentally or deliberately (as in the case of a pushing tug) contacts a dock or another vessel. An emerging trend in the maritime industry is autonomous shipping. 1999-2023, Rice University. Calculate the scale reading: (a) if the elevator accelerates upward at a rate of 1.20 m/s21.20 m/s2, and (b) if the elevator moves upward at a constant speed of 1 m/s. In this part of the problem, a=1.20 m/s2a=1.20 m/s2, so that. Azimuthing Stern Drive (ASD) tugboats can be defined shortly as a tugboat with steerable propulsion units located in aft of the vessel. this would make the mass 2.0x10^5 by the acceleration of the whole system (0.4) yet you'd need to account for water resistance on that boat which is 8.0 10^3 N, i assumed that the coal barge is connected to the tugboat. Vitus has grown on the foundation of safe, reliable operations. The tug will use its engines to move the vessel backwards. Answer (1 of 7): Where do you get the idea that Tugs only push? There are two unknowns in this equation, but substituting the expression for T2T2 in terms of T1T1 reduces this to one equation with one unknown: Solving this last equation gives the magnitude of T1T1 to be, Finally, the magnitude of T2T2 is determined using the relationship between them, T2T2 = 1.225 T1T1, found above. The propulsion systems found in tugboats come in three types: Fixed propeller with hinged rudder (Photo Credit : Tawansak/Shutterstock). Enter a Melbet promo code and get a generous bonus, An Insight into Coupons and a Secret Bonus, Organic Hacks to Tweak Audio Recording for Videos Production, Bring Back Life to Your Graphic Images- Used Best Graphic Design Software, New Google Update and Future of Interstitial Ads. In case of indirect towing, tugboats push the larger vessels on their hull, thereby rotating them around their vertical axis and changing their course. (c) Only forces acting on the system are shown here. This type of propulsion systems provides excellent manoeuvring characteristics, maximum performance in ship handling and escorting operations of tractor tugboats. The slanted riverward end of the intermediate lock wall. Associates Program, affiliate advertising program designed to provide a means All 200 miles of commercially navigable waterways in southwestern Pennsylvania are in the Port of Pittsburgh District, which encompasses a 12-county region. As their name suggests, these tugs can either tow or push barges in and around seas. How many barges can a tug boat push? Ocean tugs are engineered to work in deep sea settings. Indirect towing can later be accompanied by direct towing. Ignore any fluid drag. Suppose two tugboats push on a barge at different angles, as shown in Figure 4.21. Harbour tugboats. buy a product on Amazon from a link on here, we get a small percentage of its Fuel savings enhanced by wheel and rudder efficiencies. Luna can will continue into the future, not as a commercial tug with ships in tow but instead as part of the historic water front with people in tow. The barges have different loads so they have different masses, and the tugboats have different . If a tow line is needed, this can be done with either direct or indirect towing. Invention Of Wheel: How Was The Wheel Invented? Whatever method is used, the goal is always the same: to create enough force to move the much larger ship through the water. The tugboat pulls the two barges with an acceleration of 0.030 m/s2. The masses of the tugboats and barges and the accelerations of the systems are given for each case. Tug boats play an important role in keeping the Mississippi River running smoothly. As a result of documented fuel savings from these tests, Foss has outfitted other oceangoing tugs in its fleet with the FloScan equipment, according to company reports. Many of these vessels, especially the long distances, or long haul boats, include living quarters for the crew. Conventional tugboats the oldest types of tugboats. Here are some tips for sharing the water with them. They also act as salvage boats. With buoyancy working in their favor, tugboats do not need much effort to overcome the initial inertia of moving large ships. Freight ship departs from port. In addition, there are relatively new versions of ASD tugboats which have arranged one or more Z-Drive unit in amidships or fore of the tugboat. An example of river tugboat is given in Figure 2. Smaller boats are used in harbors, fleeting areas and around locks while larger boats operate in "line-haul" operations over long distances and between major ports. *Non-Regulation - any/all barges over than 200 in length and/or over 35 in width. A Beginners Guide. Many of these vessels, especially the long distances, or long haul boats, include living quarters for the crew. We recommend using a high bollard pulls and deformed stern form which suitable for pushing barges. (d) The forces projected onto vertical (. Neglecting air resistance, this would be equal in magnitude to the net external force on the player, since this force causes his acceleration. The design and dimension of tugs; several main engines or engine powers; rudder, propeller and propulsion systems; deck equipments (winches, capstan, windlass, towing hook etc.) River barges also have flat bottoms and are usually 200 long and 35 wide. ifsi virtual learning. For example, forces produce accelerations, a topic of kinematics, and hence the relevance of earlier chapters. Contoh: kapal tanker, kapal pesiar, kapal induk, dll. Tugboats are small, powerful boats capable of steering large ships by pulling or pushing them. Or is each barge connected to the tug boat by its own rope? A National Historic Landmark, she is the only intact steam-driven sternwheel towboat still on the United States river system. Flat bottomed vessels or barges are typically available in different sizes and can be used as per the transportation requirements. The harbour operations can mainly write as ships berthing and departure operations in harbours, ship-escorting operations inside harbour borders or inner seas, firefighting operations, emergency response operations. For any constant velocityup, down, or stationaryacceleration is zero because a=vta=vt, and v=0v=0. (Note: drag force is a frictional force exerted by fluids, such as air or water. It pushes boats rather than pulling. When a stable connection is established, the tug leads the way by pulling the vessel behind it. Also, have a profile to provide superstructures from damages during pushing operations. The feat was accomplished by Captain George E. King and his crew on the towboat M/V DELTA QUEEN.Since then, there have been other instances of large numbers of barges being pushed at one time. Tension on both sides of the rope is supposed to be the same? In the United States above St. Louis on the Upper Mississippi River and on other rivers such as the Illinois, Ohio, Arkansas, Tennessee and Cumberland, boats can handle only up to 16 barges including a "hip" barge due to the size of lock chambers. Any item deemed larger than a trash bag (ex. tugboat stock pictures, royalty-free photos & images. A few hundred . By Jeff Moag. PULLING PUSHING According to Newtons third law FpFp and FsFs are equal in magnitude and opposite in direction, so that we need to find FsFs in order to find what the scale reads. The first tugboat actually built was the Charlotte Dundas, powered by a Watt engine and paddle wheel and used on . Thus, small yet extremely powerful boats are deployed to help assist larger vessels. The masses of the tugboats and the barges along with the accelerations of th systems are given for each case. As an Amazon Associate we earn from qualifying purchases. A common scenario has one tugboat behind the ship, attached to it by a line. That is a substantial difference of 5 l/h x 3000h = 15000l x 1.3/liter 19500. Inland tugs refer to tugs that operate in relatively shallow waters. T How Does A Helicopter Work: Everything You Need To Know About Helicopters. Required fields are marked *. What would the scale have read if he were stationary? The conventional tugboats manoeuvre with the help of a classical rudder, but the ASD tugboats have remarkable improved manoeuvring capabilities with azimuth propulsion that rotates their propulsion unit (Nozzle and Propeller) at any horizontal angle to manoeuvre. Since his acceleration would be zero, the force of the scale would be equal to his weight: So, the scale reading in the elevator is greater than his 735-N (165 lb) weight. Meythaler upbound at Clark Bridge (2 of 2), Louisville, Kentucky, USA, 1987, Towboat Valvoline upbound with empty tank barges in Portland Canal, Louisville, Kentucky, USA, 1987, Towboat William Clark upbound in Portland Canal, Louisville, Kentucky, USA, 1998, "Tow boat" redirects here. Tug boats typically have a bow thruster and stern thruster, which allow them to rotate the vessel in place.Additionally, most tug boats have a winch that can be used to pull the vessel forward or backward. Rank the magnitude of the force the tugboat exerts on barge one. When an elevator accelerates downward, aa is negative, and the scale reading is less than the weight of the person, until a constant downward velocity is reached, at which time the scale reading again becomes equal to the persons weight. Front of a barge or a boat. Solving for FsFs gives an equation with only one unknown: No assumptions were made about the acceleration, and so this solution should be valid for a variety of accelerations in addition to the ones in this exercise. However, they are strong structures assisted by powerful propulsion systems that are fitted either towards the bow or directly at the stern of the ship. When a tow boat is pushing 20 or more barges, you need to think of the tow boat and the barges as a single vessel. The strongest tugboat in the world, the Island Victory, has an engine capacity of 8,000kW and a max bollard pull of 474 tons! The bathroom scale is an excellent example of a normal force acting on a body. A tugboat is not only restricted to guiding large vessels in narrow water channels. These two equations come from applying Newtons second law along the vertical and horizontal axes, noting that the net external force is zero along each axis because acceleration is zero. Physics is most interesting and most powerful when applied to general situations that involve more than a narrow set of physical principles. Generally, one or two multidirectional propulsion systems combination is preferred for tugboats, that works in the cycle of 360 degrees on the principle of two vertically built propulsion mechanism with rotating blades. Notice how low to the water this tow boat is. Therefore, a tugboat can be designed for performing one or more functions. Is Mathematics An Invention Or A Discovery? We are given the elapsed time, and so t=2.50 st=2.50 s. The unknown is acceleration, which can be found from its definition: This is an attainable acceleration for an athlete in good condition. By steering the pod, the tugboats can change direction very quickly without the need for a rudder. Towboat Ben McCool upbound on Ohio River at Matthew E. Welsh Bridge with two tank barges (1 of 6), near Mauckport, Indiana, USA, 1987, Towboat Ben McCool upbound on Ohio River at Matthew E. Welsh Bridge with two tank barges (2 of 6), near Mauckport, Indiana, USA, 1987, Towboat Ben McCool upbound on Ohio River at Matthew E. Welsh Bridge with two tank barges (3 of 6), near Mauckport, Indiana, USA, 1987, Towboat Ben McCool upbound on Ohio River at Matthew E. Welsh Bridge with two tank barges (4 of 6), near Mauckport, Indiana, USA, 1987, Towboat Ben McCool upbound on Ohio River at Matthew E. Welsh Bridge with two tank barges (5 of 6), near Mauckport, Indiana, USA, 1987, Towboat Ben McCool upbound on Ohio River at Matthew E. Welsh Bridge with two tank barges (6 of 6), near Mauckport, Indiana, USA, 1987, Towboat Bruce Darst upbound on Ohio River at Clark Bridge, Louisville, Kentucky, USA, 2005, Towboat City of Pittsburgh upbound on Ohio River at Clark Bridge, Louisville, Kentucky, USA, 2005, Towboat Dakota Storm upbound on Ohio River at Matthew E. Welsh Bridge (1 of 4), near Mauckport, Indiana, USA, 1987, Towboat Dakota Storm upbound on Ohio River at Matthew E. Welsh Bridge (2 of 4), near Mauckport, Indiana, USA, 1987, Towboat Dakota Storm upbound on Ohio River at Matthew E. Welsh Bridge (3 of 4), near Mauckport, Indiana, USA, 1987, Towboat Dakota Storm upbound on Ohio River at Matthew E. Welsh Bridge (4 of 4), near Mauckport, Indiana, USA, 1987, Towboat Elizabeth Marie departing main lock at McAlpine Locks on Ohio River, Louisville, Kentucky, USA, 1999, Towboat Enid Dibert departing main lock at McAlpine Locks on Ohio River, Louisville, Kentucky, USA, 1999, Towboat Hugh C. Blaske upbound in Portland Canal on Ohio River (1 of 2), Louisville, Kentucky, USA, 1999, Towboat Hugh C. Blaske upbound in Portland Canal on Ohio River (2 of 2), Louisville, Kentucky, USA, 1999, Towboat James G. Hines upbound in Portland Canal on Ohio River (1 of 2), Louisville, Kentucky, USA, 1999, Towboat James G. Hines upbound in Portland Canal on Ohio River (2 of 2), Louisville, Kentucky, USA, 1999, Towboat Jerry E. Holbert upbound on Ohio River at Clark Bridge, Louisville, Kentucky, USA, 2005, Towboat Martha Mac upbound in Portland Canal on Ohio River (1 of 2), Louisville, Kentucky, USA, 1999, Towboat Martha Mac upbound in Portland Canal on Ohio River (2 of 2), Louisville, Kentucky, USA, 1999, Towboat Michael J. Grainger upbound in Portland Canal on Ohio River, Louisville, Kentucky, USA, 1998, Towboat R. W. Naye upbound in Portland Canal on Ohio River (1 of 2), Louisville, Kentucky, USA, 1999, Towboat R. W. Naye upbound in Portland Canal on Ohio River (2 of 2), Louisville, Kentucky, USA, 1999, Towboat Sue Chappell upbound in Portland Canal on Ohio River (1 of 4), Louisville, Kentucky, USA, 1998, Towboat Sue Chappell upbound in Portland Canal on Ohio River (2 of 4), Louisville, Kentucky, USA, 1998, Towboat Sue Chappell upbound in Portland Canal on Ohio River (3 of 4), Louisville, Kentucky, USA, 1998, Towboat Sue Chappell upbound in Portland Canal on Ohio River (4 of 4), Louisville, Kentucky, USA, 1998, Towboat V.W.
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