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Journal articles on the topic 'With (out) ball'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Price, D. S., P. J. Neilson, A. R. Harland, and R. Jones. "Measurement of out of balance in hollow spheres using flotation dynamics: Soccer ball application." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 219, no. 2 (2005): 159–67. http://dx.doi.org/10.1243/095440605x8487.

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Soccer is a major global sport attracting participants and viewers from all continents. As its popularity increases, so the Federation Internationale de Football Association (FIFA), the world governing body, together with major manufacturers, is continually concerned with improving equipment quality of the game. One feature of a soccer ball that has previously been identified as having an influence on performance is the imbalance present with the spherical structure of the ball. The work reported here describes a potential method for quantifying imbalance in soccer balls. The ball is floated o

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2

Maynard, Brian K., and William A. Johnson. "Using Cupric Hydroxide to Reduce the Rooting-out of B&B Stock During Storage." HortScience 32, no. 3 (1997): 456A—456. http://dx.doi.org/10.21273/hortsci.32.3.456a.

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Cupric hydroxide formulated as Spin Out™ [7% Cu(OH)2 in a latex carrier] was used to prevent the rooting-out of Taxus × media Rehd. `Densiformis' root balls into surrounding mulch or soil during storage over a 4-month period. Treatments evaluated in one study included: painting the bottom of the root ball with copper-paint, setting the root ball on copper-treated burlap or ordinary copper-treated burlap; rewrapping the root ball with copper-treated burlap before mulching or burlapping with copper-treated burlap, with appropriate controls. All treatments provided good control of rooting-out aft

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3

Maynard, Brian K., and William A. Johnson. "Controlling Rooting-Out of B&B Nursery Stock During Storage." Journal of Environmental Horticulture 15, no. 2 (1997): 111–14. http://dx.doi.org/10.24266/0738-2898-15.2.111.

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Abstract Cupric hydroxide formulated as Spin Out™ (7% Cu(OH)2 in a latex carrier, w/w) was used to prevent rooting-out of Taxus × media Rehd. ‘Densiformis’ root balls into surrounding mulch or soil during storage over a four-month period. Treatments included: painting the bottom of the root ball with Spin Out™, setting the root ball on Spin Out™-treated burlap or on untreated burlap, and rewrapping the root ball with Spin Out™-treated burlap or burlapping using Spin Out™-treated burlap before mulching. All treatments provided some control of rooting-out after 12 to 16 weeks storage. The most e

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4

Loginov, Yu N., and Yu V. Zamaraeva. "EVALUATION OF THE STRESS-STRAIN STATE OF MAGNESIUM AND BIMETALLIC BALLS LOADED WITH PRESSURE IN A DRILLING WELL." Petroleum Engineering 21, no. 2 (2023): 151–58. http://dx.doi.org/10.17122/ngdelo-2023-2-151-158.

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In the oil industry, soluble balls made of magnesium alloys serve as plugs for temporary sealing of various sections wells. It is noted that magnesium is a metal with a low density, and therefore the gravitational force may not be enough to tightly press the ball against the valve seat. Therefore, the development of methods aimed at weighing the balls is relevant. This is achieved, for example, by manufacturing bimetallic balls, the shell of which is made of a degradable material, for example, magnesium or its alloys, a non-degradable material, for example, steel, is placed inside the shell. T

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5

Xiong, Xin Hong, Long Zhu, Pei Yuan Lin, Jing Ming Yang, Guo Xian Wang, and Yi Kang Liu. "Analysis and Improvement of out of Round Grinding Ball." Materials Science Forum 1026 (April 2021): 9–13. http://dx.doi.org/10.4028/www.scientific.net/msf.1026.9.

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In order to eliminate the out of round defect of grinding ball, an improvement measure is proposed. Firstly, the wear behavior and mechanism of the ball in different service conditions are obtained. Then, the root cause of grinding ball out of roundness is discussed. Finally, the corresponding improvement measures are put forward from the aspects of grinding ball material and heat treatment, so as to improve the microstructure and properties of grinding ball.

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6

de la Rubia, Alfonso, Alexis Ugalde-Ramírez, Randall Gutiérrez-Vargas, and José Pino-Ortega. "Does the New Resin-Free Molten d60 Ball Have an Impact on the Velocity and Accuracy of Handball Throws?" Applied Sciences 13, no. 1 (2022): 425. http://dx.doi.org/10.3390/app13010425.

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The aims of this study were (i) to examine gender differences between the Molten H3X5000 ball and the resin-free Molten d60 ball with regard to throwing velocity and accuracy according to two conditions, throwing situation and instruction received, and (ii) to analyse the player’s subjective perception on throwing velocity according to ball types. The sample comprised 29 handball players (18 men and 11 women), who carried out a throwing protocol to measure velocity, accuracy, and subjective perception. The main results found significant throwing velocity differences between the new balls and t

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Kida, Katsuyuki, Junnosuke Koga, Edson Costa Santos, and Takashi Honda. "Effect of Frequency on Fatigue Cracks of Silicon Nitride Balls under Cyclic Loads." Advanced Materials Research 217-218 (March 2011): 874–79. http://dx.doi.org/10.4028/www.scientific.net/amr.217-218.874.

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In the previous work, we found that the tensile stress occurring around the equator of the ball caused fatigue of the ball itself. Four groups of pre-cracks, whose surface lengths were 140μm, 220μm, 550μm and 700μm, were initiated on ball surfaces and the strength of these pre-cracked balls was measured. The static strengths and fatigue limits of all pre-cracked balls decreased with crack sizes. We concluded that the fatigue caused by a pre-crack located on the equator of the ball surface was important for understanding fatigue of silicon nitride balls. In the present work, carrying out fatigu

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Zhang, B., and A. Nakajima. "Spherical surface generation mechanism in the grinding of balls for ultraprecision ball bearings." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 214, no. 4 (2000): 351–57. http://dx.doi.org/10.1243/1350650001543241.

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Ultraprecision ball bearings are necessary for high-precision machines and/or high-speed machines since the vibration caused by ball bearings determines the precision of machines as a whole and may make high-speed machines fail to work. To produce ultraprecision ball bearings, it is necessary to clarify spherical surface generation mechanism in the grinding of balls. This paper is the first attempt to investigate the contact trace distribution on the ball surface, which is crucial to spherical surface generation. The kinematic analysis of the contact trace shows that the contact trace is a fix

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9

Septian, Andi, and Wahyu Sapto Aji. "The Method of Taking the Blessing Ball for Manual Robots at the 2018 Indonesian Robot Contest." Signal and Image Processing Letters 2, no. 2 (2023): 8–18. https://doi.org/10.31763/simple.v2i2.44.

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KRAI (Indonesian Abu Robot Contest) is a robotics contest between Higher Education in Indonesia. Indonesian ash robot contest organized by the Directorate General of Higher Education (DIRJEN DIKTI). The winner of the KRAI will represent Indonesia in the ABU (Asia-Pacific Broadcasting Union) Robocon which is held annually with locations moving around within ABU member countries. KRAI 2018 made a blessing ball picking robot with a gripper. The parameter that must be achieved is that the optimization of the robot drive can take the blessing ball. The design of the blessing ball picking mechanic c

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Paleu, Viorel, Ioan Damian, and Cristel Stirbu. "Friction Torque Measurement in Partial Hybrid S-C Angular Contact Ball Bearings." Applied Mechanics and Materials 658 (October 2014): 339–44. http://dx.doi.org/10.4028/www.scientific.net/amm.658.339.

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To monitor the friction torque evolution in tandems of angular contact ball bearings, a new testing device is developed. New partial hybrid bearings from 7206C series are obtained by combining 8 steel balls with 4 silicon nitride balls of the same diameter equally spaced in the cage, these bearings being denoted hereafter as 8S-4C type. For comparison, tests are carried-out also on conventional all-steel bearings and hybrid bearings with all the steel balls replaced by silicon nitride balls. The equilibrium temperature of the all-steel, hybrid and 8S-4C ball bearings is determined by tests. At

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11

Rutci, Alimurtaza, and Fatih Selman Eren. "Investigation of Suspension Ball Joint Pull Out Force Based on FEA Method and Experimental Study." Academic Perspective Procedia 1, no. 1 (2018): 1002–9. http://dx.doi.org/10.33793/acperpro.01.01.165.

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Suspension ball joints are always used to connect the control arms to the knuckle since they are the only joints which allow three degrees of rotational freedom. On the purpose of an sufficient performance of the ball joint, it is very important to prevent the extraction of the ball stud from the ball joint housing. Ball joint&amp;rsquo;s housing material and shape design must withstand axial loads in the ball stud from axial direction in order to avoid the ball stud pull out keeping the ball stud inside the housing. The ball stud pull out force is a critical and safety characteristic func

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Chen, Cheng, Fangyu Wang, and Hui Lin. "Experimental Study on Dam-Break-Like Tsunami Surge Impacts on Small Balls Climbing on Different Slopes." Journal of Earthquake and Tsunami 14, no. 06 (2020): 2050022. http://dx.doi.org/10.1142/s1793431120500220.

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An experimental study was carried out to investigate the tsunami surge impacts on small balls climbing on different slopes. Dam-break flows were generated in a flume to simulate tsunami surge. The water surface profiles at the sluice gate were observed, the tsunami inundation height and the surge velocity in the flume were measured, and the maximum climbing heights of small balls on different slopes were recorded. Results show that the dam-break speed and the tsunami surge strength increase with increasing reservoir water level. The increasing tsunami inundation height, the decreasing ball den

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Singh, T., and V. K. Verma. "Tribological Studies on Bearing Balls of Different Composition Using Certain Heterocyclic Compounds as Potential E.P. Additives." Journal of Tribology 112, no. 4 (1990): 614–17. http://dx.doi.org/10.1115/1.2920305.

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Tribological studies on 12.7 mm dia steel bearing ball specimens of different composition have been carried out in a “4-ball machine” using certain potentially active heterocyclic compounds-paraffin oil admixtures. EP efficiency of these additives has been compared to a commercial sulphur-phosphorus additive. 2-Phenyl-3-phenylimino-5-p-methoxyphenylimino-1,2,4-thiadiazolidine has been found to be quite effective in the lubrication of bearing balls of different compositions. The topography and surface chemistry of the used bearing ball specimens have been examined using Scanning Electron Micros

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14

Widodo, Teguh Dwi, Rudianto Raharjo, Sugiono, and Arif Wahyudiono. "Effect of Low Temperature Steel Ball Peening on the Hardness of SS 316L." Key Engineering Materials 791 (November 2018): 105–10. http://dx.doi.org/10.4028/www.scientific.net/kem.791.105.

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The aim of this research is to investigate the hardness of implant material Stainless Steel (SS) 316L due to ball peening at low temperature. In this paper, SS316L ball peening was conducted in various cryogenic temperature. The steel ball peening mechanism was bombarded on metal surface using peening ball. The shot peening treatment was performed for 10 minutes using steel balls with the size of 5 mm and 6 Bar compressed air flow. The treatment temperatures were carried out at-35°C, -45°C, and-55°C respectively. The results show that the hardness of SS316L after steel ball peening processes i

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15

Supriyanto, Adolf Asih, Widodo Widodo, Ade Irvan Tauvana, and Syafrizal Syafrizal. "The Effect of Ball Size on Hardness of Mechanically Alloyed Al-10wt.%Ti Powders." International Journal of Advanced Technology in Mechanical, Mechatronics and Materials 1, no. 2 (2020): 50–55. http://dx.doi.org/10.37869/ijatec.v1i2.21.

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Particle size and hardness of Al-10%wt.Ti powders due to the influence of ball diameter have been carried out using mechanical alloying techniques. The milling device used consisted of a Fritsch Pulverisette-5 planetary type ball mill with the rotational speed of about 360 rpm and balls size of 10, 15 and 20 mm. The materials used are stearic acid which was used as a process control agent, aluminum and titanium powders. A mixture of aluminum and titanium powders has the composition of Al-10wt.%Ti. The Al-10wt.%Ti powders, stearic acid and stainless-steel balls were added to the Fritsch Pulveri

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16

Indang, Indang. "The Validaty and Practicality of Media for Teaching Atomic Bolls for Class X Students on the Material of Atomic Strubture." JCER (Journal of Chemistry Education Research) 3, no. 2 (2020): 72. http://dx.doi.org/10.26740/jcer.v3n2.p72-77.

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One effort to improve student learning outcomes is to choose teaching media that are appropriate and attract students' attention. The media developed is a three-dimensional ball teaching media.The purpose of this study is to develop three-dimensional atomic ball teaching media, to find out the validity level of three-dimensional atomic ball teaching media, to find out the practicalities of the three-dimensional atomic ball teaching media that have been developed. This research is a type of Research and Development (R & D) research using a 4D development model, namely define, design, develo

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17

Lu, Hui Zong, Zhi Wei Wang, Qian Fa Deng, Bing Hai Lv, Fen Fen Zhou, and Ju Long Yuan. "A Study on Fast Geometric Form Measurement of High Precision Balls." Advanced Materials Research 1017 (September 2014): 669–74. http://dx.doi.org/10.4028/www.scientific.net/amr.1017.669.

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A dual probe non-contact ball roundness measurement method is presented in this paper. With two probes aligned in opposite directions, the direct measurement of diameter variation can be obtained. The relationships between diameter variation and out of roundness of a precision ball are discussed. Attempts of error separation using multiple measurements are carried out and the eccentricity of ball and spindle axis is measured. Measurement results indicated that other than the spindle radial run out, which is synchronous in nature, there also exists high frequency non-synchronous variations. Suc

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18

Avron, J., and O. Kenneth. "An elementary introduction to the geometry of quantum states with pictures." Reviews in Mathematical Physics 32, no. 02 (2019): 2030001. http://dx.doi.org/10.1142/s0129055x20300010.

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This is a review of the geometry of quantum states using elementary methods and pictures. Quantum states are represented by a convex body, often in high dimensions. In the case of [Formula: see text] qubits, the dimension is exponentially large in [Formula: see text]. The space of states can be visualized, to some extent, by its simple cross sections: Regular simplexes, balls and hyper-octahedra. a When the dimension gets large, there is a precise sense in which the space of states resembles, almost in every direction, a ball. The ball turns out to be a ball of rather low purity states. We als

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Bachtiar, Mochamad Mobed, Fadl Lul Hakim Ihsan, Iwan Kurnianto Wibowo, and Risky Eka Wibowo. "Intercept Algorithm for Predicting the Position of Passing the Ball on Robot Soccer ERSOW." Inform : Jurnal Ilmiah Bidang Teknologi Informasi dan Komunikasi 6, no. 1 (2021): 35–39. http://dx.doi.org/10.25139/inform.v6i1.3353.

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ERSOW is the name of a wheeled soccer robot that competes in the Kontes Robot Sepak Bola Indonesia (KRSBI). The soccer robot plays a soccer game based on the rules adapted from the human soccer game. The ERSOW team was formed in 2016. Starting in 2017, ERSOW participated in the KRSBI with the Middle Size League (MSL) type. Research in the field of wheeled soccer robots is mostly carried out on robot intelligence, such as how robots detect and look for balls, dribble, pass the ball, avoid opponents, and communicate in teams. This research focuses on the ability that the robot can pass the ball

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Kholifudin, M. Yasin. "Menentukan Koefisien Restitusi Tumbukan dengan Analisis Konversi Sudut Penyimpangan." Jurnal Penelitian Pembelajaran Fisika 10, no. 1 (2019): 64–69. http://dx.doi.org/10.26877/jp2f.v10i1.3492.

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Physical practicum-based learning on collision was been carried out with the aim of knowing the magnitude of the coefficient of restitution of collision of 2 toy balls that are hung on station with a rope by analyzing the conversion of angle of the deviation before and after collision to the magnitutde of velocity. The instruments used in the practicum were“ tek-tek” balls, “ping-pong” balls, clear rubber ball, bow, stationary. Data collection was taken from the 8 practicum groups each of which consists of 4 students in class X IPA 1 of Senior High School 2 Kebumen in the 2nd semester of the s

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Swirad, Slawomir. "Influence of Ball Burnishing on Lubricated Fretting of the Titanium Alloy Ti6Al4V." Lubricants 11, no. 8 (2023): 341. http://dx.doi.org/10.3390/lubricants11080341.

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Ball burnishing is a very promising alternative to grinding because of it produces little environmental pollution. It can cause improvement of the functional properties of machine parts, such as friction and wear. The connection between the ball burnishing and the lubricated fretting has not been analysed yet. In this study, it was found that ball burnishing discs from titanium alloy Ti6Al4V caused a decrease in the height of the roughness up to 84% and an increase in the microhardness up to 26% compared to the turned surface. Tribological experiments were carried out under lubricated fretting

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Wibowo, Edy, Naily Ulya, Putut Marwoto, Suwandi, and Suproyogi. "The dynamics of Lato Lato ball collisions." Physics Education 59, no. 5 (2024): 055002. http://dx.doi.org/10.1088/1361-6552/ad5780.

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Abstract Lato Lato is a toy that consists of two identical solid balls that are secured together with a rope and can be used as a learning tool in physics. In this study, we examined why the Lato Lato toy uses two balls with the same mass rather than balls with different masses. The collision of the two Lato Lato balls can be considered an elastic collision. The two balls move symmetrically at the same velocity and form a semi-circular route with opposing motion directions when we use Lato Lato with the same ball mass ( m 2 = m 1 ). The angular momentum of the two balls is also the same but in

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23

Boziwick, George. ""Take Me Out to the Ball Game"." Base Ball: A Journal of the Early Game 6, no. 2 (2012): 5–21. http://dx.doi.org/10.3172/bb.6.2.5.

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Mirsky, Steve. "Take Me Out of the Ball Game." Scientific American 303, no. 2 (2010): 92. http://dx.doi.org/10.1038/scientificamerican0810-92.

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Waters, Bryan. "Take Me Out to the Ball Game." Public Library Quarterly 19, no. 2 (2001): 11–22. http://dx.doi.org/10.1300/j118v19n02_03.

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Southern, Stephen. "Take Me Out to the Ball Game." Family Journal 17, no. 3 (2009): 201–2. http://dx.doi.org/10.1177/1066480709339298.

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27

Hodson, Hal. "Bouncy-ball cameras scout out dangerous situations." New Scientist 216, no. 2888 (2012): 18. http://dx.doi.org/10.1016/s0262-4079(12)62747-x.

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Plishner, Emily. "BALL ROLLS OUT A PLAN FOR PLASTICS." Journal of Business Strategy 17, no. 4 (1996): 48–52. http://dx.doi.org/10.1108/eb039795.

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Won, Rachel. "Take me out to the ball game." Nature Photonics 17, no. 5 (2023): 380. http://dx.doi.org/10.1038/s41566-023-01210-3.

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Si, Liang, Yijun Cao, and Guixia Fan. "The Effect of Grinding Media on Mineral Breakage Properties of Magnetite Ores." Geofluids 2021 (December 11, 2021): 1–9. http://dx.doi.org/10.1155/2021/1575886.

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The breakage and liberation of minerals are the key to fluidized mining for minerals. In the ball milling process, steel balls function as not only a grinding action implementer but also energy carrier to determine the breakage behavior of ores and the production capacity of the mill. When ground products present a much coarse or much fine particle size distribution, the separation process will suffer, resulting in inefficient recovery of useful minerals. Optimal control of the particle size distribution of the products is therefore essential, but the complexity and randomness of ball mill gri

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Froggatt, C. D., and H. B. Nielsen. "Tunguska dark matter ball." International Journal of Modern Physics A 30, no. 13 (2015): 1550066. http://dx.doi.org/10.1142/s0217751x15500669.

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It is suggested that the Tunguska event in June 1908 was due to a cm-large ball of a condensate of bound states of 6 top and 6 antitop quarks containing highly compressed ordinary matter. Such balls are supposed to make up the dark matter as we earlier proposed. The expected rate of impact of this kind of dark matter ball with the earth seems to crudely match a time scale of 200 years between the impacts. The main explosion of the Tunguska event is explained in our picture as material coming out from deep within the earth, where it has been heated and compressed by the ball penetrating to a de

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Hartner, Walter, Martin Niessner, Francesca Arcioni, et al. "Reliability and Performance of Wafer Level Fan Out Package for Automotive Radar." Journal of Surface Mount Technology 34, no. 1 (2021): 32–39. http://dx.doi.org/10.37665/smt.v34i1.12.

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Embedded wafer level ball grid array (eWLB) or FO-WLP (Fan-out wafer-level packaging) is investigated as a package for MMICs (Monolithic Microwave Integrated Circuit) for automotive radar applications in the 77GHz range. Special focus is put on the thermo-mechanical performance to achieve automotive quality targets. The typical fatigue modes “solder ball fatigue” and “copper fatigue”, evolving during thermo-mechanical stress like cycling on board will be discussed. Simulation as well as experimental preparation results for typical fatigue levels are given. In addition, several influencing para

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Lv, Bing Hai, Ju Long Yuan, F. Cheng, and Fan Yang. "Influence of Supporting Characteristics on Sphericity of Ceramic Balls in Rotated Dual-Plates Lapping Process." Advanced Materials Research 69-70 (May 2009): 69–73. http://dx.doi.org/10.4028/www.scientific.net/amr.69-70.69.

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Ceramic balls have become an important component in advanced bearings, and the sphericity of balls is a key qualification focused in lapping process. An investigation on the effect of dynamic behavior of ball support system on the performance of ball lapping in rotated dual-plates lapping method is carried out. Sinusoidal waveform in terms of Fourier analysis is employed to express the shape error of the ball surface, and a dynamic model for support is setup. It is found with numerical calculation that the variation of lapping load lags behind the variation of the shape error for the damping o

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Kurniawati, Ani, Z. Arifin, and Restu Kusnandi. "The Effect of Hanging Ball Media Training on Improving Smash Skills in Volleyball Games in the Men's Team at Club PVG Garut." Indonesian Journal of Sport, Health and Physical Education Science 2, no. 2 (2024): 42–48. http://dx.doi.org/10.58723/inasport.v2i2.184.

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This study aims to determine the effect of hanging ball media training on improving smash skills in volleyball games on the men's team at the Garut PVG club. Hanging ball media is a solution or strategy in practicing smash accuracy. Hanging ball smash training aims to provide habituation for athletes in measuring and knowing the height of the jump so that when playing volleyball athletes can hit the ball on target. Hanging ball training is a jumping exercise to reach the target ball by increasing the height of the hanging ball. The method used is experimental research method. The results showe

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Widiningsih, Ni Putu Putri, Ni Luh Putu Dian Yunita Sari, and I. GAA Sherlyna Prihandani. "Analysis of Nursing Care for Post Appendixitis Patients with Acute Pain Nursing Problems Through Providing Distraction Using a Stress Ball in the Kemoning Room Klungkung Regional General Hospital." PROMOTOR 8, no. 3 (2025): 458–65. https://doi.org/10.32832/pro.v8i3.1312.

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Patients with appendicitis are a very common problem in the community. Complications that often arise due to appendicitis include perforation, so it is necessary to treat quickly for appendicectomy. Appendicectomy can cause complications such as acute pain, to overcome pain problems in patients, pain management is needed, namely distraction using stress balls. This Ners Final Scientific Work was carried out to determine the analysis of nursing care in post appendicitis patients with acute pain nursing problems through the provision of distraction using stress balls. The results of the assessme

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Szymczak, Tadeusz, Adam Brodecki, Andrzej Eminger, Zbigniew L. Kowalewski, and Dariusz Rudnik. "Experimental Assessment of Ball Joints Operation Using Servo-Hydraulic Testing Systems." Solid State Phenomena 240 (August 2015): 232–37. http://dx.doi.org/10.4028/www.scientific.net/ssp.240.232.

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The paper reports experimental results from tests carried out at room temperature on servo-hydraulic system dedicated for examination of the exploitation properties of rocker arms. The ball joint of this element was modified by an application of composite coating such as the tungsten carbide (WC). To apply cyclic loading to rocker arms the griping system was designed and elaborated. Results from tests performed on the composite coated ball joints were compared with data obtained for typical elements. Variations of the following parameters versus time i.e. force, temperature and surface topogra

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Khamidun, Muhammad, and Cahyo Yuwono. "Pengaruh Kemampuan Gerak Motorik Kasar Terhadap Keberhasilan Belajar Lempar Tangkap Bola Siswa Tunagrahita Di SLB Negeri Wiradesa." Indonesian Journal for Physical Education and Sport 3, no. 2 (2022): 525–32. http://dx.doi.org/10.15294/inapes.v3i2.58391.

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This research is to determine the ability of gross motor movements to successfully learn to catch the ball of lightly impaired students Wiradesa State Out-of-state Schools. This research a one-group pretest posttest design. The sampling technique used was a total sampling .The instruments used in this study used a small ball capture mpar test with a wall target with a distance of one meter. The data analysis used by this study includes prerequisite tests, descriptive analysis and hypothesis tests. The results of this study are related to the results of the t test difference between the pretest

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Desyanti, Harwin Holilah, and Sasriawati Sasriawati. "The Use of Birth Ball as A Non-Pharmacological Complementary Therapy in The Reduction of Labor Pain in Phase 1." Jurnal Indonesia Sosial Sains 5, no. 08 (2024): 2041–49. http://dx.doi.org/10.59141/jiss.v5i08.1218.

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Childbirth is the process of expelling the fetus to the placenta, the process of giving birth is identical to pain, while to reduce this pain, non-pharmacological methods are carried out, one of which is the Birth Ball method. This study aims to evaluate the effectiveness of using birth ball as a non-pharmacological complementary therapy in reducing labor pain in the first stage. The method used was a narrative literature review by searching for relevant articles on Google Scholar using keywords such as “Birth ball” and “Labor pain”. Inclusion criteria included Indonesian-language articles pub

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Pinto, Gustavo, Andresa Baptista, Francisco Silva, Jacobo Porteiro, José Míguez, and Ricardo Alexandre. "Study on the Influence of the Ball Material on Abrasive Particles’ Dynamics in Ball-Cratering Thin Coatings Wear Tests." Materials 14, no. 3 (2021): 668. http://dx.doi.org/10.3390/ma14030668.

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Micro-abrasion remains a test configuration hugely used, mainly for thin coatings. Several studies have been carried out investigating the parameters around this configuration. Recently, a new study was launched studying the behavior of different ball materials in abrasive particles’ dynamics in the contact area. This study intends to extend that study, investigating new ball materials never used so far in this test configuration. Thus, commercial balls of American Iron and Steel Institute (AISI) 52100 steel, Stainless Steel (SS) (AISI) 304 steel and Polytetrafluoroethylene (PTFE) were used un

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Supancic, Peter, Robert Danzer, Walter Harrer, Zhong Hua Wang, Stefan Witschnig, and Oskar Schöppl. "Strength Tests on Silicon Nitride Balls." Key Engineering Materials 409 (March 2009): 193–200. http://dx.doi.org/10.4028/www.scientific.net/kem.409.193.

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For some years ceramic bearing balls based on silicon nitride have been routinely used in technical practice. An important property of bearing balls is their strength, but appropriate testing methods are still missing. In this paper four different methods for strength testing are applied to commercial bearing balls. Each of the tests needs a different type of specimen, their preparation needs a very different effort, and the stress state applied to the specimens is also very different. This causes pros and cons, which are discussed in detail. The conventional 4-point bending test characterises

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Pramdhan, Kartono. "Modification of Learning Media Using Rubber Balls for Volleyball Learning Outcomes at The High School Level." Journal of Physical and Outdoor Education 5, no. 2 (2023): 1–9. http://dx.doi.org/10.37742/jpoe.v5i2.211.

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Passing down is a technique of playing the ball by using the forearm side of the arm either by using one or with two arms simultaneously. A rubber ball is a ball made of elastic rubber in a round shape like a balloon, without being covered with synthetic leather like the original ball. This study aims to find out volleyball learning using rubber balls can improve passing. The research method used is the experimental method with research design using experimental methods with the pretest-posttest type. The population in this study were all class XI SMAN 1 Ciparay totaling 360 people, The sampli

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Ohta, Hiroyuki, and Takumi Nakagawa. "Using Ceramic Balls to Reduce Noise in a Linear Guideway Type Recirculating Linear Ball Bearing." Journal of Tribology 125, no. 3 (2003): 480–86. http://dx.doi.org/10.1115/1.1537264.

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A new method of reducing the noise of the linear guideway type recirculating linear ball bearing (linear bearing) was studied. In the experiments, the overall sound pressure levels of linear bearings with steel balls or ceramic Si3N4 balls were measured, and sound frequency analyses were carried out. Moreover, based on the assumption that the main cause of the noise may be the collision between the ball and the carriage, the overall sound pressure levels of the linear bearings were analyzed combining the Hertzian theory and the results of previous studies on collision sound. From the results o

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Pazgal, Amit, and Gilles Reinhardt. "Case—Take Me Out Of The Ball Game." INFORMS Transactions on Education 14, no. 3 (2014): 139. http://dx.doi.org/10.1287/ited.2014.0126cs.

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Bush, Elizabeth. "Take Me Out to the Ball Game (review)." Bulletin of the Center for Children's Books 59, no. 9 (2006): 392–93. http://dx.doi.org/10.1353/bcc.2006.0297.

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Jackson, Eugene B. "Historical note: Out of the cloudy crystal ball." Journal of the American Society for Information Science 42, no. 10 (1991): 747–53. http://dx.doi.org/10.1002/(sici)1097-4571(199112)42:10<747::aid-asi8>3.0.co;2-7.

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Zhou, Fenfen, Weifeng Yao, Julong Yuan, Binghai Lyu, Tianchen Zhao, and Ping Zhao. "Experimental study on lapping ceramic balls with variable-radius groove plate." Advances in Mechanical Engineering 13, no. 7 (2021): 168781402110334. http://dx.doi.org/10.1177/16878140211033416.

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The method of lapping precision ball with variable-radius groove is developed in recent years. An experimental study on lapping ceramic balls with variable-radius groove was carried out. Taguchi method was used to design the orthogonal experiment of rough lapping, and the material removal rate ( MRR) and the roundness were selected as evaluation indicators. The signal to noise ratio (S/N) and the analysis of variance were used to analyze experimental results. The optimal parameters combination with load pressure of 2.5 N/Ball, abrasive concentration of 10 wt% and rotation speed of 15 rpm was o

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Adekunle, Adetayo Yekinni, Olugbenga Rabiu Taiwo, and David Sogunro Olukayode. "Design of a breaking machine for separating pairs of high chromium grinding ball media." Global Journal of Engineering and Technology Advances 4, no. 3 (2020): 023–30. https://doi.org/10.5281/zenodo.4467518.

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A high chromium grinding ball media coded NF6357A is a replacement casting produced by Nigerian Foundries limited, Lagos, Nigeria for cement mill grinding. The 30 mm diameter ball casting is produced by machine moulding. The balls come out in pairs after shakeout, and must be separated and heat-treated before delivery to the customers. In this study, a separating machine is designed to break the adjoining area of the pairs into a unit to overcome the challenges of the existing manual breaking. The machine composed of electric motor with reducer gear, chute/chute support, hammer and pulley. The

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McElwaine, J., and K. Nishimura. "Ping-pong ball avalanche experiments." Annals of Glaciology 32 (2001): 241–50. http://dx.doi.org/10.3189/172756401781819526.

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AbstractPing-pong ball avalanche experiments have been carried out for the last 3 years at the Miyanomori ski jump in Sapporo, Japan, to study three-dimensional granular flows. Up to 550 000 balls were released near the top of the landing slope. The balls then flowed past video cameras positioned close to the flow, which measured individual ball velocities in three dimensions, and air-pressure tubes at different heights. The flows developed a complicated three-dimensional structure with a distinct head and tail, lobes and “eyes”. “Eyes” have been observed in laboratory granular flow experiment

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Gao, R. X., and W. Thelen. "Sensor-Integrated Grinding Balls for on-Line Load Distribution Measurement in Ball Mills." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 208, no. 3 (1994): 183–90. http://dx.doi.org/10.1243/pime_proc_1994_208_077_02.

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For the on-line measurement of stress and energy distributions inside ball mills, two types of self-contained, autonomous grinding balls with fully integrated piezo-electric sensors and data-processing electronics are developed and fabricated. The basic model is designed for batchwise experiments on ball mills, where data registered in electronic memories are read out through cable connections to a processing circuit. The improved model contains additional data modulation circuits with a VHF microtransmitter, allowing on-line data retrieval. For the purpose of circuit miniaturization, hybrid a

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Kang, Xian Min, and Lin Wang. "Experimental Analysis of Axial Load Internal Circulation Ball Screw Pair of Friction Torque and the Impact." Applied Mechanics and Materials 401-403 (September 2013): 139–45. http://dx.doi.org/10.4028/www.scientific.net/amm.401-403.139.

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According to the working principle of the ball in and out of the race in inner circulation and external loop, analyzed under the action of axial force of the ball in and out of the influence of the raceway for the ball screw friction resistance, due to ball in rail friction drag is small, that the inner loop no loss as external loop ball friction energy in the circulation pipe, friction torque variation of the ball in and out is small. Experimental results show that the inner loop of the ball screw's friction torque increases with the increase of rotational speed, but the amount of friction to

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