Foot slide

Keywords— Biomechanics, Variability, Consistency, Arm Swing, Foot Slide. 

The final delivery phase in bowling comprised of three major events which are the arm swing, front foot slide and ball release. The temporal variable that was measured was the execution time and the between-trial temporal variability while the measured performance criteria were average bowling score (Ba e) and ball release velocity (BRvei). 

In terms of foot slide execution time, it appears that quicker execution times lead to higher BRvei- A bowler that releases at a higher velocity would invariably have their whole body moving at higher initial velocity, which means that the foot needed to slide faster - hence the quicker slide time. 

Interestingly, the foot slide temporal variability was rather unexpected. The elite group had higher temporal variability of the foot slide (Mean SD of FFS to BR) as compared to the semi-elite bowlers. In other words, the expert performers were less consistent in the temporal aspects of the foot slide. Also, it appeared that higher FFS execution time variability was correlated with better bowling average - albeit not significantly. 

In impact sports, often a performer consistently tries to minimize execution time in order to increase implement velocity to achieve maximum ball velocity and/or distance. In bowling, it is likely that expert bowlers vary their temporal and spatial parameters - in this instance especially their foot slide, to adjust their final body segments into correct positions prior to releasing the ball. These adjustments are necessary to attain maximum accuracy. 

Consistent temporal and spatial skill execution in sports has commonly been linked to expert performers. However, results of this study indicated that the arm swing temporal characteristics and variability were not determinants of playing level nor did it relate to bowling performance. Furthermore, the foot slide temporal data showed that the elite bowlers were less consistent than the semi-elite bowlers. Overall, it is concluded that in the final delivery phase of tenpin bowling, a more consistent execution time did not relate to higher playing level or better bowling performance. 

Razman, R., Abas, W. and Osman, N. (2010) Front foot slide variability and its relation to tenpin bowling performance. Proceedings of the 28th International Conference on Biomechanics in Sports. Northern Michigan University, Marquette, Michigan, USA, 2010. 

Large drops (De =1 cm) of chlorobenzene will fall through water with a somewhat erratic oscillatory motion (L3). The drop pitches and rolls. The flight is not vertical but is erratically helical in nature. A series of oscillations, accompanied by waves moving over the interface, can cause the drop to drift several inches in a horizontal direction in a range of a foot or two of fall. Such drops can not oscillate violently as described above, due to the damping action of such movement by the sliding side-wise motion of the wobble. Motion pictures indicate that internal circulation is also considerably damped out by this type of oscillation. Rate of... 

Taylor s bag-fil t T—Fig.556—consists of a number of cotton hags about two feet in length and a foot in diameter when fully extended. Inte their narrow months the nozzles of the lubes pass which deliver the sirup. The bags aro fastened on the nozzles by means of a sliding ring. Bach bag is inclosed in a cylindrical one of canvass about four inches in diameter, tho object of which is to prevent the swelling out of the interior cotton filter. In such a filter of course the interior bog is much folded nor can it in this state present the same amount of filtering surface as it. would were it fully inflated. It may indeed be questioned whether... 

PRESSURE. If a body of fluid is at rest, the forces are in equilibrium or the fluid is in static equilibrium. The types of force that may aci on a body are shear or tangential force, tensile force, and compressive force. Fluids move continuously under the action of shear or tangential forces. Thus, a fluid at rest is free in each part from shear forces one fluid layer does not slide relative to an adjacent layer. Fluids can be subjected to a compressive stress, which is commonly called pressure. The term may be defined as force per unit area. The pressure units may be dynes per square centimeter, pounds per square foot, torr. mega-Pascals, etc. Atmospheric pressure is the force acting upon a unit area due to the weight of the atmosphere. Gage pressure is the difference between the pressure of the fluid measured (at some point) and atmospheric pressure. Absolute pressure, which can be measured by a mercury barometer, is the sum of gage pressure plus atmospheric pressure. 

The ice generator consists of two vertically assembled 5-foot sections of 6-inch borosilicate glass pipe. The refrigerant and brine mixture jets toward the wall near the top of the column. The refrigerant flashes off immediately, leaving the ice slurry to slide down the walls. A large wall area is provided to allow time for the small amount of methylene chloride hydrate which forms to decompose. Although metastable at the column pressure, the hydrate which does form decomposes slowly. At the bottom of... 

For example, these kinds of processes actively proceed on the Caucasian continental slope off Dzhugba and Arkhipo-Osipovka. Here, the underwater relief is characterized by extreme complicacy and irregularity. Landslide formations are encountered at depths of about 850 m at a distance of 6 km from the coast. The thickness of the sliding units is 20-25 m at a length of 350-400 m. The landslides descend to depths of 1200-1500 m at the foot of the continental slope. 

Table-blown glassware of the laboratory may also be given an annealing with advantage in a small annealing oven heated by a gas flame. A convenient brickwork chamber for the laboratory or small workshop is one about 2 feet square in area and about i foot deep. It should be provided with a small chimney outlet with a sliding... 

In all power throwing, and especially in combat work, the purpose is to hurl the knife with the greatest possible velocity. So stand with your left foot forward (instead of the right), extend your knife arm all the way back, and sweep it forward and overhand in a mighty swing. Get your weight behind it and, most important, follow through. The release is the same as in the other throws—a smooth rhythmic slide from the hand. 

The reverse sequence was used on the other side of the anode to complete a symmetrical cell pair. Thus, each side of the anode was divided into three compartments separated by the ion-selective membranes. Thirteen tie bolts kept the stack tightly sealed. One wooden peg through the stack top kept the stack components from sliding and disaligning the assembly. Effective area of the membranes was one square foot. The membrane frames separated the membranes from the electrodes. The plastic electrode screen prevented the membranes from touching the electrodes. The cell construction or stack assembly is illustrated in Figure 11.2. Figure 11.1 also shows a side view of the cathode. 

Regenerated catalyst to the reactor was drawn from the regenerated catalyst hopper through a standpipe in which slide a valve controlled the flow rates. The 113 foot regenerated catalyst standpipe operated with a pressure head of 31 PSI. 

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