Showing papers on "Paddle published in 2011"
TL;DR: In this paper, the physiological demands as well as the structural characteristics of the competitive practice of paddle tennis were determined. But, the results were limited to 12 simulated games, where the average time of game, in-play-time, and out-of-play time were registered in each match.
50 citations
Patent•
23 Mar 2011
TL;DR: In this article, an integrated circuit packaging system and method of manufacture thereof includes: leads and a paddle; a first encapsulant molded between the leads and the paddle; conductive traces directly on the leads.
Abstract: An integrated circuit packaging system and method of manufacture thereof includes: leads and a paddle; a first encapsulant molded between the leads and the paddle, the first encapsulant thinner than the leads; a non-conductive layer over the paddle; and conductive traces directly on the leads, the first encapsulant, and the non-conductive layer.
39 citations
Patent•
14 Sep 2011
TL;DR: In this paper, an external gear engaged flat paddle ship propulsion unit is described, where the gear drives the flat paddle with the external gear to pad and produce a thrust; and due to the restraint of the guide plate, the flat paddles with external gear rotates a half of a circle and forward moves straightly.
Abstract: The invention discloses an external gear engaged flat paddle ship propulsion unit and relates to the technical field of ship machinery. The external gear engaged flat paddle ship propulsion unit comprises a main shaft, a gear, a flat paddle with an external gear, a locating bar, a top plate, a base plate, a guide plate and side plates; the gear and the flat paddle with the external gear are arranged on both sides of the guide plate respectively; and the locating bar passes through the flat paddle with the external gear and is fixed between the top plate and the base plate. Under the driving of power, the gear drives the flat paddle with the external gear to pad and produce a thrust; and due to the restraint of the guide plate, the flat paddle with the external gear rotates a half of a circle and forward moves straightly. The device has a simple structure and very high efficiency, and can be used in ships and models thereof as a thrust device.
26 citations
Patent•
14 Sep 2011
TL;DR: In this paper, a ship propelling device with an internal gear-engaging flat paddle was described, which relates to the technical field of ship machines and can be used as a thrust device for ships and models thereof.
Abstract: The invention discloses a ship propelling device with an internal gear-engaging flat paddle, which relates to the technical field of ship machines. The device comprises a main shaft, an upper bearing, a lower bearing, a gear, a flat paddle with an internal gear, a top plate, a bottom plate, a guiding plate and a side plate; the main shaft penetrates through the flat paddle with the internal gear and is mounted on the top plate and the bottom plate by the upper bearing and the lower bearing; and the external surface of one side of the flat paddle with the internal gear is attached on the guiding plate. Under the driving of power, the gear drives the flat paddle with the internal gear to row so as to generate a propelling force, and due to the limitation of the guiding plate, the flat paddle with the internal gear rotates half turn and then moves ahead linearly. The device has a simple structure and a quite high efficiency, and can be used as a thrust device for ships and models thereof.
25 citations
TL;DR: In this article, a planing and skipping of a rectangular paddle on the surface of a shallow stream was studied, and it was concluded that the rise of water ahead of the paddle, in particular the way this varies over time, is responsible for causing the planing state to become unstable.
Abstract: Experiments are conducted to study the planing and skipping of a rectangular paddle on the surface of a shallow stream. The paddle is allowed to move freely up and down by attaching it to a pivoted arm. A steady planing state, in which the lift force from the water balances the weight on the paddle, is found to be stable for small stream velocities but to become unstable above a certain threshold velocity which depends upon the weight and the angle of attack. Above this threshold, the paddle oscillates in the water and can take off into a continual bouncing, or skipping, motion, with a well-defined amplitude and frequency. The transition is sometimes bistable so that both a steady planing state and a regular skipping state are possible for the same experimental parameters. Shallow-water theory is used to construct simple models that explain the qualitative features of the planing and skipping states in the experiments. It is found that a simple parameterisation of the lift force on the paddle proportional to the depth of entry is not sufficient to explain the observations, and it is concluded that the rise of water ahead of the paddle, in particular the way this varies over time, is responsible for causing the planing state to become unstable and for enabling a continual skipping state.
24 citations
TL;DR: In this article, the effect of paddle number and immersed radius ratio on water wheel performance was investigated in the presence of a 3 HP pump and the velocity in the channel of 0.3 m/s.
24 citations
01 Jan 2011
TL;DR: In this article, the authors developed a system to quantify the forces generated on each side of the kayak paddle (left and right), in the blades' plane of maximal force application and in other planes, and to gain more insights about the on-water paddling force profile and associated variables.
Abstract: The purpose of this study was to develop a system (FPaddle system) to quantify the forces generated on each side of the kayak paddle (left and right), in the blades’ plane of maximal force application and in other planes, and to gain more insights about the on-water paddling force profile and associated variables. Using the FPaddle system forces applied on the paddle by an elite female kayaker were measured. Results suggested that the use of strain gages on two different planes provides more detailed information about the forces applied on the paddle throughout the paddling stroke including the exit phase relatively to the used of strain gages only in the plane of maximal force application.
24 citations
TL;DR: In this article, the hydrodynamic pressure experienced by a point on a paddle during kayaking training sessions was investigated to assess paddling technique and effectiveness, and a force sensor was mounted on the bottom of each blade and waterproofed, with minimal change to the blade shape.
20 citations
09 May 2011
TL;DR: A hybrid mechanism of a wheeground a paddle as drive mechanism itself to realize an effective movement on the border such as a coast with debris after a disaster like a seismic sea wave or a tanker grounding accident is proposed.
Abstract: This paper describes a combination mechanism of a wheeground a paddle to realize an effective movement on the border of ground and water. For the conventional mobile mechanisms on water or on ground the combination of the mechanism to the body of the robot separately, and each one can be the interruption to the other in each field. In this research, we propose a hybrid mechanism of a wheeground a paddle as drive mechanism itself to realize an effective movement on the border such as a coast with debris after a disaster like a seismic sea wave or a tanker grounding accident. A prototype robot has been built and basic experiments on its motion have been conducted.
17 citations
TL;DR: Analysis by multiple linear regression revealed major influences on the effectiveness of the magic trick of object height and object area, demonstrating the applicability of analysing key factors of magic tricks to reveal limits of the perceptual system.
Abstract: Following Gustav Kuhn's inspiring technique of using magicians' acts as a source of insight into cognitive sciences, we used the 'paddle move' for testing the psychophysics of combined movement trajectories. The paddle move is a standard technique in magic consisting of a combined rotating and tilting movement. Careful control of the mutual speed parameters of the two movements makes it possible to inhibit the perception of the rotation, letting the 'magic' effect emerge--a sudden change of the tilted object. By using 3-D animated computer graphics we analysed the interaction of different angular speeds and the object shape/size parameters in evoking this motion disappearance effect. An angular speed of 540 degrees s(-1) (1.5 rev. s(-1)) sufficed to inhibit the perception of the rotary movement with the smallest object showing the strongest effect. 90.7% of the 172 participants were not able to perceive the rotary movement at an angular speed of 1125 degrees s(-1) (3.125 rev. s(-1)). Further analysis by multiple linear regression revealed major influences on the effectiveness of the magic trick of object height and object area, demonstrating the applicability of analysing key factors of magic tricks to reveal limits of the perceptual system.
16 citations
Patent•
08 Sep 2011
TL;DR: In this paper, a two-axis tracking mechanism for a concentrated photovoltaic system is described, where two or more paddle structures containing multiple CPV modules are installed onto each tilt axle on the common roll axle as part of the tracking mechanism's solar array.
Abstract: Methods and apparatus are described for a two axis tracking mechanism for a concentrated photovoltaic system. Two or more paddle structures containing multiple CPV modules are installed onto each tilt axle on the common roll axle as part of the two-axis tracking mechanism's solar array. The two or more paddle structures couple across the common roll axle on that tilt axle. The common roll axle and each paddle assembly are manufactured in simple modular sections that assemble easily in the field while maintaining the alignment of the tracker assembly.
Patent•
31 Mar 2011
TL;DR: In this paper, a flipped top source low-side MOSFET is connected to the top surface of the die paddle and thus is grounded through the exposed bottom surface of die paddle.
Abstract: A combined packaged power semiconductor device includes a flipped top source low-side MOSFET electrically connected to a top surface of a die paddle, a first metal interconnection plate connecting between a bottom drain of a high-side MOSFET or a top source of a flipped high-side MOSFET to a bottom drain of the low-side MOSFET, and a second metal interconnection plate stacked on top of the high-side MOSFET chip. The high-side, low-side MOSFET and the IC controller can be packaged three-dimensionally that reduces the overall size of semiconductor devices and can maximize the chip's size within a package of the same size and improves the performance of the semiconductor devices. The top source of flipped low-side MOSFET is connected to the top surface of the die paddle and thus is grounded through the exposed bottom surface of die paddle, which simplifies the shape of exposed bottom surface of the die paddle and maximizes the area to facilitate heat dissipation.
Patent•
14 Sep 2011
TL;DR: A wave energy converter (WEC) designed to capture the predominantly horizontal (surge) water motion in near-shore waves is called a Surge-type WEC as mentioned in this paper, which consists of a moveable paddle that faces and resists the wave motion, in a way that converts the energy of wave motion into a more useful form, such as electricity.
Abstract: A wave-energy converter (WEC) designed to capture the predominantly horizontal (surge) water motion in near-shore waves is called a Surge-type WEC. A Surge-type WEC comprises a moveable paddle that faces and resists the wave motion, in a way that converts the energy of the wave motion into a more useful form, such as electricity. The challenge addressed by the present invention is the efficient capture of the energy contained in the entire water column, from the seabed to the surface. This is a challenge because the height of the water column (depth) varies both within waves and with the tide. Capture of the full water column is accomplished using a floating paddle. The top of the paddle is pinned to the water surface by buoyancy. The lower portion of the water column is captured differently in different embodiments.
01 Jan 2011
TL;DR: Oxygen uptake values measured during paddle tennis competition reached values below 50% of maximal oxygen uptake assessed in treadmill test, whereas the mean value for heart rate during the matches represented approximately a 74% maximal heart rate reached in the same laboratory test.
Abstract: Summary Objective. — To determine the physiological demands as well as the structural characteristics of the competitive practice of paddle tennis.
Journal Article•
TL;DR: 3D motion techniques were used to quantify the path of the paddle and to define the area swept by it in its aerial and aquatic movement.
Abstract: Resumen en: Aim. To quantify the path of the paddle and to define the area swept by it in its aerial and aquatic movement. Methods. 3D motion techniques were used to...
Patent•
09 Nov 2011
TL;DR: In this article, a tri-shaft planet frame-paddle type agitator is described, which is characterized by comprising a main shaft, paddle blade agitating shafts, a central gear, a lower bearing chamber, a planet gear, an upper bearing chamber and an agitating paddle blade.
Abstract: The utility model relates to a tri-shaft planet frame-paddle type agitator, which is characterized by comprising a main shaft, paddle blade agitating shafts, a central gear, a lower bearing chamber, a planet gear, an upper bearing chamber, a frame type agitating paddle blade, agitating paddle blades and an agitator body. The lower bearing chamber is arranged at the bottom inside the agitator body. The upper bearing chamber is arranged on top of the agitator body. The main shaft is arranged between the upper bearing chamber and the lower bearing chamber. The frame type agitating paddle blade is arranged on the main shaft, and the central gear is arranged at the upper end of the lower bearing chamber. Planet gears are arranged at two ends of the central gear, and planet gears are provided with the paddle blade agitating shafts penetrating the bottom edge and the top edge of the frame type agitating paddle blade. The agitating paddle blades are arranged on the paddle blade agitating shafts inside the frame type agitating paddle blade. The main shaft drives the frame type agitating paddle blade to rotate, and the planet gears drive the paddle blade agitating shafts to agitate the materials. Speeds and directions of rotation of the frame type agitating paddle blade and the paddle blade agitating shafts are different so that the rotation is even and comprehensive.
Patent•
14 Sep 2011
TL;DR: In this article, an independent paddle change control method and device of a large-scale wind generator system are used for realizing the independent paddle changes control of the wind generator in the method that the load of a spindle of a fan and the position angle of a wind wheel are measured to obtain horizontal axis bending moment and vertical axis bending moments on a hub fixed-coordinate system.
Abstract: The invention provides an independent paddle change control method and device of a large-scale wind generator system, which are used for realizing the independent paddle change control of the wind generator system in the method that the load of a spindle of a fan and the position angle of a wind wheel are measured to obtain horizontal axis bending moment and vertical axis bending moment on a hub fixed-coordinate system. According to the device and the method, the load of the spindle can be measured by only arranging an optical strain transducer on the spindle, so that the number of the optical strain transducer can be reduced. As the spindle does not move relative to a hub, so that measurement and signal transmission are relatively simple, and the improvement of the reliability of load signals can be facilitated. Therefore, as sensors adopted by the device and the method are few, the cost can be reduced; and as a measurement scheme needed for fixing the spindle is simple and easy to realize, and long-time delay is avoided, so that the measurement result can be relatively accurate and has high reliability, and the control result can be more ideal.
Patent•
19 Oct 2011
TL;DR: In this paper, a sludge superheated vapor drying system of a two-stage paddle dryer is described, where the primary and secondary stages of the system are connected through a pipe and the discharge hole of the primary stage is connected with the feed inlet of the secondary stage.
Abstract: The invention relates to a sludge superheated vapor drying system of a two-stage paddle dryer In the system, a sludge pump is connected with a feed inlet of the primary-stage paddle dryer through a pipe, the discharge hole of the primary-stage paddle dryer is connected with the feed inlet of a secondary-stage paddle dryer, and the discharge hole of the secondary-stage paddle dryer is connected with the inlet of a sludge incineration boiler; the air outlet of the primary-stage paddle dryer is sequentially connected with a washer, a draught fan A and the sludge incineration boiler through pipes; the air outlet of the secondary-stage paddle dryer is connected with a dust collector cyclone which is connected with the air inlet of the secondary-stage paddle dryer and the air inlet of the primary-stage paddle dryer through a draught fan B respectively; and the vapor outlet of the sludge incineration boiler is connected with the air inlet of the secondary-stage paddle dryer and the tail gasoutlet of the sludge incineration boiler is sequentially connected with a tail gas washer, a bag-type dust remover, a draught fan C and a chimney through pipes The invention also discloses a sludge drying process using the system at the same time
Patent•
07 Sep 2011
TL;DR: In this article, the utility model relates to a redundant electric pitch-regulated system based on a super capacitor, where a PLC (Programmable logic controller) module and a paddle-pitched-regulated driving module are arranged between the PLC and the driving module, and when the three PLC modules are all failed, the corresponding driving motor is directly driven/braked by the three-phase alternating current.
Abstract: The utility model relates to a redundant electric pitch-regulated system based on a super capacitor. Each paddle pitch-regulated driving module of the redundant electric pitch-regulated system contains alternating current and spare direct current power supply inputs; the paddle pitch-regulated driving module is used for directly driving/braking a corresponding driving motor through a main power supply contactor/main brake contactor, and after an individual paddle pitch-regulated driving module is failed, the paddle pitch-regulated driving modules without faults can also be used for driving/braking driving motors corresponding to the failed paddle pitch-regulated driving modules through a redundant contactor after the corresponding driving motor is driven/braked by the paddle pitch-regulated driving module without faults; when the three paddle pitch-regulated driving modules are all failed, the corresponding driving motor is directly driven/braked by the three-phase alternating current; a direct-current power supply consists of a super capacitor charger, a super capacitor and a BOOSTER circuit which provides working power supply for corresponding paddle drivers and can also provide working power supply for other paddle drivers; and a communication wire is arranged between a PLC (Programmable Logic Controller) module and the paddle pitch-regulated driving module.
Patent•
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25 Apr 2011
TL;DR: In this paper, a street paddle which allows a user of an associated skateboard of similar devise to smoothly stroke with two hands and arms and upper body, rather than using their foot to accelerate or decelerate is disclosed.
Abstract: A street paddle which permits a user of an associated skateboard of similar devise to smoothly stroke with two hands and arms and upper body, rather than using their foot to accelerate or decelerate is disclosed The street paddle is unique in that is allows a skateboard rider to pull and push their way on the street to accelerate, similar to a stand up paddlers or canoe paddlers on the water A contact point, blade footing of the street paddle, where the paddle device comes in contact with the ground, connects to the bottom of an elongated shaft of the paddle The footing comprises form and material that facilitates traction, when applied against a traveled surface, as well as shock dampening action to assist in smoothness and acceleration As such, the street paddle may also be used to decelerate the speed by dragging the footing on the ground in such a way that the friction of the contact slows the skateboard The footing comprises a hook-shaped element to permit a user to grab park and other path-side features for the purpose of performing tricks
Patent•
29 Dec 2011TL;DR: A plug connector (100) includes a paddle board (21) and a housing having a first and a second housing portions (11, 12) The first housing portion includes a first side wall (1111) defining a first channel, a second side wall defining a second channel, and a cavity (13) defined between the front portion of the first wall and the second wall.
Abstract: A plug connector (100) includes a paddle board (21) and a housing having a first and a second housing portions (11, 12) The first housing portion includes a first side wall (1111) defining a first channel (112 a), a second side wall (1112) defining a second channel (112 b), and a cavity (13) defined between the front portion of the first side wall and the second side wall The first channel has a rear portion exposed outwardly of the cavity for guiding the paddle board The second housing portion is engaged with the first housing portion along a left-to-right direction to be in alignment with the second side wall for positioning the paddle board between the first and second housing portions
Patent•
17 Aug 2011
TL;DR: In this article, a pulley type potential generator is described, which comprises of a pusher, a cam, and a plurality of blades, which are uniformly disposed outside the pulley in a circular direction.
Abstract: The invention relates to a pulley type potential generator, which comprises a pulley, a cam, and a plurality of blades These blades are uniformly disposed outside the pulley in the circular direction Each blade comprises a sub paddle and a main paddle, wherein the sub paddle is longer, while the main paddle is relatively shorter One end of the main paddle is rotatably attached to the outer wall of the pulley through a pin roll, and the other end of the main paddle is hinged to a sub paddle through a rotation shaft The cam disposed inside the pulley is attached to every main paddle througha mandrel mechanism whose the number is the same with the number of the main paddle Each mandrel mechanism comprises a mandrel and an offsetting spring A pulley abutting against the cam is attachedto the inner end of the mandrel A cross shaft is disposed on the outer end of the mandrel in a manner that it is embedded into a sliding slot on the inner surface of the main paddle, and slidingly engaged with the sliding slot By adopting a changeable blade structure, the pulley type potential generator is capable of power generation by fully utilizing hydraulic power, and the conversion ratio between the hydraulic power and the electric power is very high
Patent•
31 Oct 2011
TL;DR: In this article, an exercise assembly simulating the muscular movements of a kayaker is presented, which includes an elongate seat resiliently mounted on a spine structure structure supported by adjustable pedestals.
Abstract: An exercise assembly simulating the muscular movements of a kayaker includes an elongate seat resiliently mounted on an elongate spine structure structure supported on adjustable pedestals that are each further resiliently mounted. At the front end an adjustably aligned pivot engages through a U-joint a simulated kayak paddle with the motion of the pivot resisted by restricted orifice cylinders mounted in the spine structure. A generally uniform adjustment arrangement is utilized to conform the assembly to the various users and/or various exercise levels.
Patent•
07 Sep 2011
TL;DR: A paddle lead assembly for providing electrical stimulation of patient tissue includes a paddle body having a proximal end, a distal end, and a longitudinal axis as discussed by the authors, and a plurality of spaced-apart electrodes are disposed on the paddle body.
Abstract: A paddle lead assembly for providing electrical stimulation of patient tissue includes a paddle body having a proximal end, a distal end, and a longitudinal axis. A plurality of spaced-apart electrodes are disposed on the paddle body. The plurality of spaced-apart electrodes include a first electrode and a second electrode. At least one adjustable region is configured and arranged to adjust a center-to-center distance between the first electrode and the second electrode. At least one lead body is coupled to the paddle body. A plurality of terminals are disposed on the at least one lead body. A plurality of conductive wires couple each of the electrodes to at least one of the plurality of terminals.
Patent•
23 Feb 2011
TL;DR: In this paper, column type solid-liquid countercurrent contact apparatus, a solid particle cleaning apparatus for polyarylene sulfide (PAS) particles, etc., and a PAS production apparatus which have a column top portion, a column body portion, and a column bottom portion and are provided with a plurality of stirring chambers in the column body part which are partitioned from one another by annular partition boards and arranged vertically in communication with one another.
Abstract: Disclosed are a column type solid-liquid countercurrent contact apparatus, a solid particle cleaning apparatus for polyarylene sulfide (PAS) particles, etc., and a PAS production apparatus which have a column top portion, a column body portion, and a column bottom portion and are provided with a plurality of stirring chambers in the column body portion which are partitioned from one another by annular partition boards and arranged vertically in communication with one another, wherein paddle blades and baffles are disposed in each stirring chamber (where the ratio of the diameter of the paddle blades to the diameter of the stirring chamber is >= 0.65 and the ratio of the width of the paddle blades to the diameter of the stirring chamber is <= 0.10), and wherein discs which are large enough to cover at least a portion of the communication openings below the paddle blades are attached to the stirring shaft or the paddle blades. Also disclosed are a solid-liquid countercurrent contact method, a solid particle cleaning method for PAS particles, etc., and a PAS production method.
01 Jan 2011
TL;DR: In this paper, the authors report on a set of trials of a relatively high powered and high rotational speed paddle wheel fastened to a purpose built 8m long planing skiff which achieved speeds in excess of 32 knots.
Abstract: The paddle wheel has existed as a marine propulsor for in excess of two hundred years yet has been developed little over the last one hundred years. It could be concluded that the paddle has stagnated as a means of efficient propulsion for today‟s marine vessels. As technology develops in other areas, is it possible that paddle propulsion could find applications not yet considered? Has the paddle reached its maximum potential? This paper challenges the assumption that paddle forms of propulsion are ineffective at high rotational speeds through two means: a report on a set of trials of a relatively high powered and high rotational speed paddle wheel fastened to a purpose built 8m long planing skiff which achieved speeds in excess of 32 knots; and results from previous experimental work on paddles, carried out in the Denny experiment tank at Dumbarton, Scotland, were non-dimensionalised, replotted and applied to predict and interpret the performance of the paddle operated on the planing skiff. The paddle achieves propulsion through a relatively large swept area, thus achieving the potential for relatively high efficiency of propulsion. The present design operated with low immersion, up to about 75mm, but at lower immersions down to 5mm at higher speeds, in the wake behind an immersed transom stern. The paper reports on performance of this paddle and interprets the results in the light of the existing historical experimental results.
29 Nov 2011
TL;DR: In this paper, the motion of a sprint canoe blade through the water is extrapolated from video analysis of the paddle handle motion and used to approximate the forces acting on the blade throughout a stroke.
Abstract: The motion of a sprint canoe blade through the water is extrapolated from video analysis of the paddle handle motion and used to approximate the forces acting on the blade throughout a stroke. Fram...
Patent•
08 Sep 2011
TL;DR: In this article, a solar array has its surface area structurally broken up into multiple discreet components smaller in size than the entire solar array itself, which make up the surface area of the solar array.
Abstract: In an embodiment, a solar array has its surface area structurally broken up into multiple discreet components smaller in size than the entire solar array itself Multiple paddle pair assemblies form and make up the surface area of the solar array Two or more of the paddle structures form a paddle pair assembly per tilt axle of the two axis tracker mechanism A set of solar receivers, each with its own secondary concentrator optic is aligned within and secured in place in each CPV module in a paddle structure All of the photovoltaic cells on the two axis tracker mechanism are electrically connected to form the voltage output from the solar array