Journal articles: 'Impact forces'

1

McNair, P. "Impact forces and injury." Journal of Science and Medicine in Sport 9 (December 2006): 46. http://dx.doi.org/10.1016/j.jsams.2006.12.107.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Nigg, Benno M. "Impact forces in running." Current Opinion in Orthopaedics 8, no. 6 (December 1997): 43–47. http://dx.doi.org/10.1097/00001433-199712000-00007.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Grosso, Catherine, David Baldus, and George Woodworth. "The Impact of Civilian Aggravating Factors on the Military Death Penalty (1984-2005): Another Chapter in the Resistance of the Armed Forces to the Civilianization of Military Justice." University of Michigan Journal of Law Reform, no. 43.3 (2010): 569. http://dx.doi.org/10.36646/mjlr.43.3.impact.

Full text

Abstract:

In 1984, the U.S. Armed Forces amended its capital punishment system for death eligible murder to bring it into compliance with Furman v. Georgia. Those amendments were modeled after death penalty legislation prevailing in over thirty states. After a brief period between 1986 and 1990, the charging decisions of commanders and the conviction and sentencing decisions of court martial members (jurors) transformed the military death penalty system into a dual system that treats two classes of death eligible murder quite differently. Since 1990, a member of the armed forces accused of a killing a commissioned officer or murder with a direct impact on the ability of military commanders to run an effective and disciplined military is significantly more likely to face a capital court martial and be sentenced to death than a similarly situated member accused of a murder connected to the military only fry the identity of the accused. This empirical study of charging and sentencing decisions in 104 death eligible military murders from 1984-2005 documents contemporary resistance to the civilianization of the military death penalty as manifest in charging and sentencing decisions. We conclude that a limitation of death eligible murder to those directly impacting military command and control could reduce the risk of arbitrariness in the administration of the military death penalty.

APA, Harvard, Vancouver, ISO, and other styles

4

Hossain, Mosharrof, and Muhammed Hasnain Kabir Nayeem. "SHAPE IMPACT ON AERODYNAMIC FORCES." International Journal of Engineering Applied Sciences and Technology 5, no. 1 (May 31, 2020): 85–91. http://dx.doi.org/10.33564/ijeast.2020.v05i01.012.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Gilroy, Paul. "“Rhythm in the Force of Forces”." Critical Times 2, no. 3 (December 1, 2019): 370–95. http://dx.doi.org/10.1215/26410478-7862525.

Full text

Abstract:

Abstract This essay is addressed to discrepancies between musical and political time. It uses the death of Hugh Masekela to consider the changing pattern of intergenerational relationships and the place of music within local and transnational freedom movements. The impact of technological change on the mediation of political solidarity is then examined through two principal examples: the elaboration of generic racial identity and the weaponization of culture and information by the alt-right and its fellow travelers.

APA, Harvard, Vancouver, ISO, and other styles

6

Vilayvong, K., N. Yasufuku, and R. Ishikura. "Evaluation of rainfall erosivity and impact forces using strain gauges." Lowland Technology International 17, no. 4 (2016): 207–17. http://dx.doi.org/10.14247/lti.17.4_207.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Potthast, Wolfgang, Gert-Peter Brüggemann, Arne Lundberg, and Anton Arndt. "The Influences of Impact Interface, Muscle Activity, and Knee Angle on Impact Forces and Tibial and Femoral Accelerations Occurring after External Impacts." Journal of Applied Biomechanics 26, no. 1 (February 2010): 1–9. http://dx.doi.org/10.1123/jab.26.1.1.

Full text

Abstract:

The purpose of this study was to quantify relative contributions of impact interface, muscle activity, and knee angle to the magnitudes of tibial and femoral accelerations occurring after external impacts. Impacts were initiated with a pneumatically driven impacter under the heels of four volunteers. Impact forces were quantified with a force sensor. Segmental accelerations were measured with bone mounted accelerometers. Experimental interventions were hard and soft shock interfaces, different knee angles (0°, 20°, 40° knee flexion), and muscular preactivation (0%, 30%, 60% of maximal voluntary contraction) of gastrocnemii, hamstrings, and quadriceps. Greater knee flexion led to lower impact forces and higher tibial accelerations. Increased muscular activation led to higher forces and lower tibial accelerations. The softer of the two shock interfaces under study reduced both parameters. The effects on accelerations and forces through the activation and knee angle changes were greater than the effect of interface variations. The hardness of the two shock interfaces explained less than 10% of the variance of accelerations and impact forces, whereas knee angle changes explained 25–29%, and preactivation changes explained 35–48% of the variances. It can be concluded that muscle force and knee joint angle have greater effects in comparison with interface hardness on the severity of shocks on the lower leg.

APA, Harvard, Vancouver, ISO, and other styles

8

Yeow, Chen Hua, Chee Hoong Cheong, Kian Siang Ng, V. S. Lee Peter, and C. H. Goh James. "TIBIAL CONTACT FORCES DURING IMPACT COMPRESSION OF THE KNEE JOINT(3E1 Sports & Impact Biomechanics I)." Proceedings of the Asian Pacific Conference on Biomechanics : emerging science and technology in biomechanics 2007.3 (2007): S237. http://dx.doi.org/10.1299/jsmeapbio.2007.3.s237.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Haas, Trevor, Peter Dunaiski, and Philippe Maincon. "Evaluation of End Buffer Impact Forces." IABSE Symposium Report 96, no. 9 (January 1, 2009): 28–37. http://dx.doi.org/10.2749/222137809796078757.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Nigg, Benno M., Gerald K. Cole, and Gert-Peter Brüggemann. "Impact Forces during Heel-Toe Running." Journal of Applied Biomechanics 11, no. 4 (November 1995): 407–32. http://dx.doi.org/10.1123/jab.11.4.407.

Full text

Abstract:

Impact forces have been speculated to be associated with the development of musculoskeletal injuries. However, several findings indicate that the concepts of “impact forces” and the paradigms of their “cushioning” may not be well understood in relation to the etiology of running injuries and that complex mechanisms may be responsible for injury development during running. The purposes of this paper are (a) to review impact mechanics during locomotion, (b) to review injuries and changes of biological tissue due to impact loading, and (c) to synthesize the mechanical and biological findings. In addition, directions for future research are discussed. Future research should address the development of noninvasive techniques to assess changes in the morphology and biochemistry of bone, cartilage, tendon, and ligaments; researchers should also try to simulate impact loading during activities such as running, focusing on the interaction of the various loading parameters that determine the acceptable windows of loading for biological tissues.

APA, Harvard, Vancouver, ISO, and other styles

11

Mandal, Nirmal K., Manicka Dhanasekar, and Yan Quan Sun. "Impact forces at dipped rail joints." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 230, no. 1 (June 11, 2014): 271–82. http://dx.doi.org/10.1177/0954409714537816.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Sun, Jing, Nelson Lam, Lihai Zhang, Dong Ruan, and Emad Gad. "Contact forces generated by hailstone impact." International Journal of Impact Engineering 84 (October 2015): 145–58. http://dx.doi.org/10.1016/j.ijimpeng.2015.05.015.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Sturm, Michael, Bernhard Gems, Florian Keller, Bruno Mazzorana, Sven Fuchs, Maria Papathoma-Köhle, and Markus Aufleger. "Experimental measurements of flood-induced impact forces on exposed elements." E3S Web of Conferences 40 (2018): 05005. http://dx.doi.org/10.1051/e3sconf/20184005005.

Full text

Abstract:

Torrential flood hazards are a major threat for inhabited alluvial fans. They have the potential to relocate large amounts of sediment from the upper catchments to settlement areas on the alluvial fans where typically distributary processes take place. The approaching water-sediment-mixture impacting on building walls are part of a set of damage-generating mechanisms and may cause severe damages to buildings and infrastructure. It is difficult to predict the magnitude and temporal forces on buildings due to the complex flow patterns and sediment deposition processes around obstacles on the floodplain. Our work focuses on experimental measurements of impact forces of flood events on buildings at a 1:30 scale model. It covers the alluvial fan of the Schnannerbach torrent (Austria) with a set of building structures which are equipped with force measurement devices. The measured impact forces are correlated to the approaching flow heights. Influencing factors on the impacts forces such as surrounding buildings on the floodplain and the presence of openings in the building envelope are also analysed. The influence of different hydraulic flow patterns on the impact forces and regression analyses for an estimation of impact forces are presented.

APA, Harvard, Vancouver, ISO, and other styles

14

Gupta, Vineet, Narender P. Reddy, and Pelin Batur. "Forces in Laparoscopic Surgical Tools." Presence: Teleoperators and Virtual Environments 6, no. 2 (April 1997): 218–28. http://dx.doi.org/10.1162/pres.1997.6.2.218.

Full text

Abstract:

Minimally invasive surgery (MIS), even with its shortcomings, has had a far reaching impact in the field of surgery. During MIS procedures, as the surgeon's hands are remote from the site of the surgery, they do not have a feel of the tissue being manipulated and the forces that should be applied to manipulate the tissue. Studies are being conducted to provide tactile and force feedback of the tissues being manipulated to the surgeon. However, the surgeons are trained in conventional surgery and are familiar with the forces that they apply on the conventional surgical tools. Therefore, before such studies are conducted, there is a need for quantitative comparison of conventional and laparoscopic tools. The purpose of the present investigation was to determine if the forces applied on the conventional surgical forceps are the same as those applied on the laparoscopic forceps during the same procedures. The results of the study showed that the handle and tip forces in laparoscopic forceps were significantly different from that of the conventional surgical forceps (p ≤0.005). The results also showed that the mean power of the surface EMG measured from flexor pollicis brevis (flexor of the thumb) and the extensor pollicis brevis (extensor of the proximal thumb) while manipulating laparoscopic forceps were significantly different from that measured while manipulating conventional surgical forceps for the same procedure (p ≤ 0.005).

APA, Harvard, Vancouver, ISO, and other styles

15

Qiu, Dan, Sang Wook Lee, Mukarram Amine, and Derek G. Kamper. "Intersegmental kinetics significantly impact mapping from finger musculotendon forces to fingertip forces." Journal of Biomechanics 65 (December 2017): 82–88. http://dx.doi.org/10.1016/j.jbiomech.2017.10.004.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Bazhenov, V. A., O. S. Pogorelova, and T. G. Postnikova. "Contact Impact Forces at Discontinuous 2-DOF Vibroimpact." Applied Mathematics and Nonlinear Sciences 1, no. 1 (March 14, 2016): 183–96. http://dx.doi.org/10.21042/amns.2016.1.00014.

Full text

Abstract:

AbstractDynamic behaviour of contact impact forces in strongly nonlinear discontinuous vibroimpact system is studying. Contact impact force is one of the most significant vibroimpact system characteristics. We investigate the 2-DOF vibroimpact system by numerical parameter continuation method in conjunction with shooting and Newton-Raphson methods. We simulate the impact by nonlinear contact interactive force according to Hertz’s contact law. This paper is the continuation of the previous works [1,2]. We have determined the instability zones and bifurcations points for loading curves [1] and frequency-amplitude response [2] under variation of excitation amplitude and frequency. In this paper we investigate the behaviour of contact forces at bifurcation points particularly at discontinuous bifurcation points where set-valued Floquet multipliers cross the unit circle by jump that is their moduli becoming more than unit by jump. It is phenomenon unique for nonsmooth systems with discontinuous right-hand side. We observe also the contact forces increase at nT -periodical multiple impacts regimes. We also learn the change of contact forces behaviour when the impact between system bodies became the soft one due the change of system parameters.

APA, Harvard, Vancouver, ISO, and other styles

17

Dung, Nguyen Thai, and Nguyen Duc Thuyen. "STUDY ON IMPACT FORCES OF THE UNDERWATER CAVITY PROJECTILE." Vietnam Journal of Science and Technology 54, no. 6 (December 7, 2016): 797. http://dx.doi.org/10.15625/0866-708x/54/6/7228.

Full text

Abstract:

The motion of the underwater projectile with cavity effect including two motions: the projectile moves in the forward direction, center of mass of the projectile rotation around its nose makes tail of the projectile impacts on the cavity wall. According to, the impact forces occur, they include the drag force at its none, the impact force at impact point. The paper studies the forces occur on during motion of the underwater cavity projectile. Added, this paper considers the effect of the length and distributive projectile to the magnitude of impact force and the drag force of the underwater cavity projectile.

APA, Harvard, Vancouver, ISO, and other styles

18

Fathallah, Fadi A., and John P. Cotnam. "Impact Forces during Exit from Commercial Vehicles." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 42, no. 12 (October 1998): 926–30. http://dx.doi.org/10.1177/154193129804201219.

Full text

Abstract:

Injuries resulting from exiting trucks represent a substantial cost to businesses who operate these equipment. Many vehicles have aids to assist the driver in safely entering/exiting the vehicle. Nevertheless, many drivers do not use these aids. The purpose of this study was to quantify impact forces experienced during various truck exit methods. The study investigated impact forces of ten male subjects while exiting two tractors and a step-van. The results showed that jumping from cab-level resulted in impact forces as high as 12 times subject body weight; whereas, fully utilizing the steps and grab-rails kept the impact forces under two times body weight. Using the grab-rail during exiting the step-van resulted in over 40% reduction in impact force. An approach that emphasizes optimal design of entry/exit aids, coupled with driver training of proper use of these aids and education on the potential risks is expected to minimize vehicle-related musculoskeletal injuries.

APA, Harvard, Vancouver, ISO, and other styles

19

EBBEN, WILLIAM E., DOUGLAS Q. BLACKARD, and RANDALL L. JENSEN. "Quantification of Medicine Ball Vertical Impact Forces." Journal of Strength and Conditioning Research 13, no. 3 (August 1999): 271–74. http://dx.doi.org/10.1519/00124278-199908000-00015.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Goyal, Suresh, Ronald G. Larson, and Charles J. Aloisio. "Quantitative Prediction of Impact Forces In Elastomers." Journal of Engineering Materials and Technology 121, no. 3 (July 1, 1999): 294–304. http://dx.doi.org/10.1115/1.2812378.

Full text

Abstract:

We measure the impact forces and deflections resulting from drop tests of a mass with a flat impact surface onto flat pads of various elastomeric materials, and show that the forces can be predicted quantitatively with no adjustable parameters by using a theory whose only inputs are the linear viscoelastic characteristics of the materials, measured in small-amplitude oscillatory deformations. The theory, which models the elastomer as a nonlinear neo-Hookean material, is accurate for several elastomeric solids including polyurethanes, polynorbomene, and poly-vinyl-chlorides (PVCs), over a wide range of impact velocities, masses, temperatures and pad thicknesses. Some steps are taken to extend the model to surfaces which are not flat. The application in mind is the rational design of elastomeric components in impact-tolerant portable electronic equipment.

APA, Harvard, Vancouver, ISO, and other styles

21

Hügl, Silke, Tobias Blum, Thomas Lenarz, Omid Majdani, and Thomas S. Rau. "Impact of anatomical variations on insertion forces." Current Directions in Biomedical Engineering 4, no. 1 (September 1, 2018): 509–12. http://dx.doi.org/10.1515/cdbme-2018-0122.

Full text

Abstract:

AbstractThe choice of a cochlear implant electrode carrier for the individual patient is influenced by cochlear size, as this parameter has an impact on the risk of scala dislocations. Therefore, size and morphology should be represented in artificial cochlear models too, since these are generally used for insertion studies evaluating newly developed cochlear implant electrode carriers and insertion techniques, before human temporal bone studies are applied for. Within this study custom-made electrode carrier test samples were inserted into nine artificial cochlear models of different shape. To fabricate them, four human temporal bone samples have been processed by a serial cross-sectioning technique; the other four samples have been scanned with micro computed tomography. The cochlea was segmented on this data using rotating, midmodiolar slice planes, followed by the generation of a three-dimensional digital model, which finally was projected on a plane and 2D models were milled out of PTFE. The ratios of length to width of the cochlear basal turn of our samples were found to be within previously reported range. For comparative reasons a model used in previous studies was included in this study too. The maximal insertion forces per cochlear model followed a normal distribution. The insertion depth at initial insertion force increase is correlated to the length of cochlear basal turn. Using the here presented cochlear models with varying anatomical measures may help to increase the clinical relevance of insertion studies in artificial cochlear models.

APA, Harvard, Vancouver, ISO, and other styles

22

Parsons, Richard. "Forces for change in social impact assessment." Impact Assessment and Project Appraisal 38, no. 4 (November 21, 2019): 278–86. http://dx.doi.org/10.1080/14615517.2019.1692585.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Kersting, Uwe G. "Regulation of impact forces during treadmill running." Footwear Science 3, no. 1 (February 13, 2011): 59–68. http://dx.doi.org/10.1080/19424280.2011.552074.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Syngellakis, S., and R. Balaji. "Tension leg platform response to impact forces." Marine Structures 2, no. 2 (January 1989): 151–71. http://dx.doi.org/10.1016/0951-8339(89)90010-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Bisseling, Rob W., and At L. Hof. "Handling of impact forces in inverse dynamics." Journal of Biomechanics 39, no. 13 (January 2006): 2438–44. http://dx.doi.org/10.1016/j.jbiomech.2005.07.021.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Porcari, John, Megan Thiel, Nagmeh Gheidi, Susan Bramwell, Abigail Ryskey, and Carl Foster. "Impact Forces When Exercising On The FreebounderTm." Medicine & Science in Sports & Exercise 51, Supplement (June 2019): 954. http://dx.doi.org/10.1249/01.mss.0000563361.40557.cb.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Markova, Jana, and Karel Jung. "Reliability Assessment of Bridge Column under Accidental Impact." Key Engineering Materials 691 (May 2016): 239–49. http://dx.doi.org/10.4028/www.scientific.net/kem.691.239.

Full text

Abstract:

It is shown that alternative procedures for probabilistic assessment of design impact forces given in EN 1991-1-7 leads to similar results. The impact forces are up to three times greater than the recommended indicative values given in the main text of EN 1991-1-7. Provided that no other safety measures are undertaken, the structures designed for recommended lower bound of impact forces may have insufficient reliability. Application of the upper limit of impact forces should be recommended for key bridges where the bridge columns are situated near road intersections or in the adverse configuration of the terrain.

APA, Harvard, Vancouver, ISO, and other styles

28

Daniel, Harold, Christian Graham, and Brian Doore. "Virtual Teamwork and Commitments Impact on Project Quality." International Journal of e-Collaboration 13, no. 4 (October 2017): 42–58. http://dx.doi.org/10.4018/ijec.2017100103.

Full text

Abstract:

This article examines how commitment among individuals involved in a short term, virtual team projects influence the quality of the project outcome. Results indicate that forced and habitual commitment types had a negative impact on virtual team project quality but found no evidence of the hypothesized positive influences of affective, normative or economic commitment. Findings suggest that commitment in virtual teams, particularly those virtual teams that engage in short term projects, may not exert the influence observed in co-located teams involved in longer duration projects. Further, forced and habitual commitment may actually be destructive. As such, the findings of this study suggest that for project quality to be achieved, other forces may be necessary.

APA, Harvard, Vancouver, ISO, and other styles

29

Knudsen, Jakob, and Ali R. Massih. "Vibro-Impact Dynamics of a Periodically Forced Beam." Journal of Pressure Vessel Technology 122, no. 2 (January 27, 2000): 210–21. http://dx.doi.org/10.1115/1.556175.

Full text

Abstract:

The vibration and impact dynamics of a periodically forced loosely supported beam are analyzed. The wear work rates at impact points are evaluated. The considered beam is clamped at one end, and constrained against unilateral contact at contact sites, with or without friction, near the other end. In this work, the structure is modeled by a Bernoulli-type beam supported by springs using finite element method. Our model calculations are compared with measurements of contact forces and displacements made on a loosely supported rod that was subjected to harmonic loading. Furthermore, the dynamics of vibro-impacts are characterized by evaluating the impact velocity as a function of harmonic excitation frequency for two idealizations of the aforementioned structure. [S0094-9930(00)01002-7]

APA, Harvard, Vancouver, ISO, and other styles

30

Soleymani, MM, M. Fooladi Mahani, and M. Rezaeizadeh. "Experimental study the impact forces of tumbling mills." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 231, no. 2 (August 3, 2016): 283–93. http://dx.doi.org/10.1177/0954408915594526.

Full text

Abstract:

Impact forces are one of the mechanisms for grinding in mill. This takes place when the particles elevated by the lifters get into cascade motion and their fall on the load causes the breakage of other particles. The present paper aimed to study the impact forces in terms of variables like: mill speed, solid charge filling (ball filling), slurry concentration, and slurry filling. In this work, the influence of these operating parameters was investigated using a pilot mill. To this end, a copper ore was used to prepare slurry at different solid concentration. The tests covered a range of slurry filling from 0 to 2 with five different balls filling between 12% and 36% of mill volume and six different speeds between 60% and 85% of critical speed. The results delineate that the increase in the mill speed leads to a remarkable increase in the amount and frequency of the impact forces. Increasing the charge volume leads to decrease the maximum impact forces. The results show that with the increase in slurry filling and the resulting formation of a pool, the impact forces will decrease. Moreover, it is found that with the increase in slurry concentration, the slurry will act as a damper decreasing the impact forces.

APA, Harvard, Vancouver, ISO, and other styles

31

Perez, Sergio. "IMPACT!: Reducing impact forces on underwater pipelines exposed to submarine slides." International Oil Spill Conference Proceedings 2011, no. 1 (March 2011): abs212. http://dx.doi.org/10.7901/2169-3358-2011-1-212.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Djamal, Mitra, Kazuhide Watanabe, Kyohei Irisa, Irfa Aji Prayogi, Akihiro Takita, Takao Yamaguchi, and Yusaku Fujii. "DYNAMIC CHARACTERISTICS MEASUREMENTS OF A FORCE TRANSDUCER AGAINST SMALL AND SHORT-DURATION IMPACT FORCES." Metrology and Measurement Systems 21, no. 1 (March 1, 2014): 59–66. http://dx.doi.org/10.2478/mms-2014-0006.

Full text

Abstract:

Abstract A method for evaluating the dynamic characteristics of force transducers against small and short-duration impact forces is developed. In this method, a small mass collides with a force transducer and the impact force is measured with high accuracy as the inertial force of the mass. A pneumatic linear bearing is used to achieve linear motion with sufficiently small friction acting on the mass, which is the moving part of the bearing. Small and short-duration impact forces with a maximum impact force of approximately 5 N and minimum half-value width of approximately 1 ms are applied to a force transducer and the impulse responses are evaluated.

APA, Harvard, Vancouver, ISO, and other styles

33

Lichtenstein, Eli I. "Sensory Force, Sublime Impact, and Beautiful Form." British Journal of Aesthetics 59, no. 4 (August 15, 2019): 449–64. http://dx.doi.org/10.1093/aesthj/ayz033.

Full text

Abstract:

Abstract Can a basic sensory property like a bare colour or tone be beautiful? Some, like Kant, say no. But Heidegger suggests, plausibly, that colours ‘glow’ and tones ‘sing’ in artworks. These claims can be productively synthesized: ‘glowing’ colours (etc.) are not beautiful; but they are sensory forces—not mere ‘matter’, contra Kant—with real aesthetic impact. To the extent that it inheres in sensible properties, beauty is plausibly restricted to structures of sensory force. Kant correspondingly misrepresents the relation of beautiful wholes to their parts. Beautiful form is not extrinsic to sensory force. Sensible beauty is just the holistic impact of agonistically-interacting sensory forces. When sensory forces interact hierarchically, their collective impact is closer to the sublime, in quality if not degree. The simplest sensory experience of sublimity is just the impact of radically intensified sensory forces, similar in kind if not degree to the individual ‘singing’ tones in a beautiful melody.

APA, Harvard, Vancouver, ISO, and other styles

34

Hu, Feinan, Jingfang Liu, Chenyang Xu, Wei Du, Zhihua Yang, Xinmin Liu, Gang Liu, and Shiwei Zhao. "Soil internal forces contribute more than raindrop impact force to rainfall splash erosion." Geoderma 330 (November 2018): 91–98. http://dx.doi.org/10.1016/j.geoderma.2018.05.031.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Chan, E. S., and W. K. Melville. "Plunging Wave Forces on Surface-Piercing Structures." Journal of Offshore Mechanics and Arctic Engineering 111, no. 2 (May 1, 1989): 92–100. http://dx.doi.org/10.1115/1.3257093.

Full text

Abstract:

An experimental study of deepwater plunging wave loads on vertical walls and cylinders is reported. Simultaneous measurements of the forces and pressures are obtained. The characteristics of the impact loads are presented and the scaling of pressures from model results to prototype scales is discussed. Overall, the characteristics of forces and pressures vary systematically with the structure’s location relative to the wave-breaking location. Impacts on cylinders are similar to those on a flat plate; however, the presence of the wall has a larger influence on the dynamics of impact compared to that of the cylinder.

APA, Harvard, Vancouver, ISO, and other styles

36

He, Shangwen, Kunli Si, Bingbing He, Zhaorui Yang, and Ying Wang. "Rub-Impact Dynamics of Shrouded Blades under Bending-Torsion Coupling Vibration." Symmetry 13, no. 6 (June 16, 2021): 1073. http://dx.doi.org/10.3390/sym13061073.

Full text

Abstract:

Shroud devices which are typical cyclic symmetric structures are widely used to reduce the vibration of turbine blades in aero engines. Asymmetric rub-impact of adjacent shrouds or aerodynamic excitation forces can excite the bending-torsion coupling vibration of shrouded blades, which will lead to complex contact motions. The aim of this paper is to study the rub-impact dynamic characteristics of bending-torsion coupling vibration of shrouded blades using a numerical method. The contact-separation transition mechanism under complex motions is studied, the corresponding boundary conditions are set up, and the influence of moments of contact forces and aerodynamic excitation forces on the motion of the blade is considered. A three-degree-of-freedom mass-spring model including two mass blocks with the same size and shape is established to simulate the bending-torsion coupling vibration, and the dynamic equations of shrouded blades under different contact conditions are derived. An algorithm based on the fourth-order Runge–Kutta method is presented for simulations. Variation laws of the forced response characteristics of shrouded blades under different parameters are studied, on the basis of which the method to evaluate the vibration reduction characteristics of the shrouded blade system when the motion of the blade is chaotic is discussed. Then, the vibration reduction law of shrouded blades under bending-torsion coupling vibration is obtained.

APA, Harvard, Vancouver, ISO, and other styles

37

Sun, Jing, Nelson Lam, Lihai Zhang, Dong Ruan, and Emad Gad. "Computer Simulation of Contact Forces Generated by Impact." International Journal of Structural Stability and Dynamics 17, no. 01 (January 2017): 1750005. http://dx.doi.org/10.1142/s0219455417500055.

Full text

Abstract:

Spring-connected lumped mass models are well-known tools for simulating the impact actions including forces generated at the point of contact which are responsible for localized damage to the target. However, the stiffness properties of the impactor would need to be known in order that such contact forces can be simulated with good accuracies. For most projectile materials, such information required for modeling is not available. A computational algorithm which forms part of a new modeling technique for simulating the contact forces is introduced in this paper. Cricket ball was used as the example impactor to illustrate the procedure.

APA, Harvard, Vancouver, ISO, and other styles

38

Parker, J. K., and F. W. Paul. "Controlling Impact Forces in Pneumatic Robot Hand Designs." Journal of Dynamic Systems, Measurement, and Control 109, no. 4 (December 1, 1987): 328–34. http://dx.doi.org/10.1115/1.3143862.

Full text

Abstract:

Robot hands capable of applying controllable forces to a wide variety of objects would increase the number of robotic applications in manufacturing. One frequently overlooked part of the force control problem is the initial impact between the robot hand “finger” and the object. Experimentally determined impact forces for a variety of hand fingertip and object surface stiffnesses are presented. Impact forces predicted from low order, lumped parameter linear models are also presented for comparison. These results are used to justify velocity control as the means for reducing impact forces. Minimum time optimal control of a robot hand finger with a zero final velocity constraint would give rapid grasping with zero impact force between the finger and object. Experimental and numerical optimal control results for a pneumatically actuated finger are presented. A proof-of-concept robot hand which implements a “near-optimal” control strategy for grasping objects at imprecisely known locations is presented and discussed with experimental results.

APA, Harvard, Vancouver, ISO, and other styles

39

Falland-Cheung, Lisa, J. Neil Waddell, Kai C. Li, Darryl C. Tong, and Paul A. Brunton. "Anatomical head model to measure impact force transfer through the head layers and their displacement." Journal of Concussion 2 (January 2018): 205970021877782. http://dx.doi.org/10.1177/2059700218777829.

Full text

Abstract:

When the human head is subjected to blunt force impact, there are several mechanical responses that may result from the forces involved, including absorption of impact forces through the various layers of the head. The purpose of this study was to develop an anatomical head model to measure force transfer through the various head layers and their displacement when subject to short-duration high-velocity impacts. An anatomical head model was constructed using previously validated simulant materials: epoxy resin (skull), polyvinyl siloxane (scalp), agar/glycerol/water (brain) and modified intravenous fluid for the cerebrospinal fluid. An array of accelerometers (4 mm × 4 mm × 1.45 mm) was incorporated into the various layers of the head to measure forces in x- (anterior/posterior), y- (left/right) and z- (up/down) axis. All sensors were connected to a signal conditioning board and USB powered data loggers. The head model was placed into a rigid metal stand with an optical sensor to trigger data capturing. A weight (750 g) was dropped from a height of 0.5 m (n= 20). Impact forces (z-axis) of 1107.05 N were recorded on top of the skin, with decreasing values through the different layers (bottom of skin 78.48 N, top of skull 319.82 N, bottom of skull 87.30 N, top and centre of brain 47.09 N and base of brain 78.41 N. Forces in the x- and y-axes were similar to those of the z-axis. With the base of the brain still receiving 78.41 N, this highlights the potential danger of repetitive impact forces to the head. Upon impact the layers of the head are displaced in the x-, y- and z-direction, with the highest values shown in the z-axis. In conclusion, this study identified the importance of considering short-duration high-intensity impacts to the head and their effect on underlying tissues.

APA, Harvard, Vancouver, ISO, and other styles

40

Ricard, Mark D., and Steve Veatch. "Comparison of Impact Forces in High and Low Impact Aerobic Dance Movements." International Journal of Sport Biomechanics 6, no. 1 (February 1990): 67–77. http://dx.doi.org/10.1123/ijsb.6.1.67.

Full text

Abstract:

This study compared impact forces and loading rates in a high and low impact aerobic dance movement. Five subjects each performed five trials of the low impact front knee lift (LFKL) and five trials of the high impact front knee lift (HFKL). The data were recorded using an AMTI force plate at 1,000 Hz. A repeated-measures ANOVA was used to test for differences in selected variables for the LFKL and HFKL. Peak impact force was significantly lower in the LFKL than the HFKL, mean 0.98 BW and 1.98 BW, respectively. Mean loading rate was significantly lower in the LFKL (14.38 BW/s) than the HFKL (42.55 BW/s). Mean impact impulse during the first 50 ms of impact was significantly lower in the LFKL (0.0131 BW•s) than the HFKL (0.0295 BW•s). Based upon these differences in external ground reaction forces, it appears that low impact front knee lifts impose a significantly lower load than high impact front knee lifts.

APA, Harvard, Vancouver, ISO, and other styles

41

Sudhamathi, R. K., and M. Ganeswari. "Impact of Macroeconomic Forces on Indian Stock Market." Asian Journal of Research in Business Economics and Management 9, no. 4 (2019): 12. http://dx.doi.org/10.5958/2249-7307.2019.00005.7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Han, In-Hwan. "Microparticle Impact Motion with Adhesion and Frictional Forces." Transactions of the Korean Society of Mechanical Engineers A 26, no. 8 (August 1, 2002): 1698–708. http://dx.doi.org/10.3795/ksme-a.2002.26.8.1698.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Liu, Yung Sheng, Tswn Syau Tsay, Tsai Chu Wang, and Chi Fan Liu. "The Impact of Bicycle Suspension on Pedaling Forces." Applied Mechanics and Materials 479-480 (December 2013): 338–42. http://dx.doi.org/10.4028/www.scientific.net/amm.479-480.338.

Full text

Abstract:

Front and/or rear suspensions of bicycles become popular for the purpose of riding comfort especially for mountain bicycle. Suspension system include damper for shock absorbing and spring for rebounding. Therefore suspension systems would increase bicycle riding effort since damper dissipates energy. ADAMS®/LifeMOD® are proposed in this research to establish a Bicycle-Human Integrated Multibody Dynamic Model to investigate the impact of bicycle suspensions on cyclists leg muscle forces under various pedaling conditions. Muscles compared include adductor magnus, rectus femoris, vastus lateralis and semitendinosus. Pedaling conditions include riding on flat road, over a road bump, and climbing slope. The results indicate that suspension system increases the pedaling forces of vastus lateralis and semitendinosus. However suspension system decreases the pedaling forces of adductor magnus and rectus femoris. The integrated model built in this research may be used as reference for designing bicycle suspension systems. In addition, the results of this study can be used as the basis of leg weight training for long-distance off-road cyclists to strengthen certain muscles.

APA, Harvard, Vancouver, ISO, and other styles

44

Leong, J., and M. H. Murray. "Probabilistic analysis of train–track vertical impact forces." Proceedings of the Institution of Civil Engineers - Transport 161, no. 1 (February 2008): 15–21. http://dx.doi.org/10.1680/tran.2008.161.1.15.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

KAJUNA, S. T. A. R., W. K. BILANSKI, and G. S. MITTAL. "RESPONSE OF BANANAS AND PLANTAINS TO IMPACT FORCES." Journal of Texture Studies 28, no. 1 (April 1997): 71–85. http://dx.doi.org/10.1111/j.1745-4603.1997.tb00102.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Guglielmi, A. V., and F. Z. Feygin. "Impact of Ponderomotive Forces on the Earth’s Magnetosphere." Izvestiya, Physics of the Solid Earth 54, no. 5 (September 2018): 712–20. http://dx.doi.org/10.1134/s1069351318050075.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Bruening, Dustin A., and James G. Richards. "Redesigning Figure Skating Boots To Reduce Impact Forces." Medicine & Science in Sports & Exercise 37, Supplement (May 2005): S215. http://dx.doi.org/10.1249/00005768-200505001-01140.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Michael J. Delwiche. "Theory of Fruit Firmness Sorting by Impact Forces." Transactions of the ASAE 30, no. 4 (1987): 1160–71. http://dx.doi.org/10.13031/2013.30537.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Balsom, Michael, Frank R. Wilson, and Eric Hildebrand. "Impact of Wind Forces on Heavy Truck Stability." Transportation Research Record: Journal of the Transportation Research Board 1969, no. 1 (January 2006): 115–20. http://dx.doi.org/10.1177/0361198106196900116.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Liu, Jun, Jianlong Tian, and Ping Yi. "Impact forces of submarine landslides on offshore pipelines." Ocean Engineering 95 (February 2015): 116–27. http://dx.doi.org/10.1016/j.oceaneng.2014.12.003.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Impact forces'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles