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Journal articles on the topic 'Oscillating head'

Author: Grafiati

Published: 28 June 2021

Last updated: 29 July 2025

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1

Li, Ming, BianJiang Li, Na Cai, Wei Zhao, and QingChun Lei. "Research on the oscillating combustion characteristics of single-head combustion chambers based on POD." Journal of Physics: Conference Series 3026, no. 1 (2025): 012065. https://doi.org/10.1088/1742-6596/3026/1/012065.

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Abstract A study on the oscillating combustion characteristics of a single-head combustion chamber was conducted in the paper. A particle image velocimetry system was used to obtain high-resolution flame images. The proper orthogonal decomposition method is employed to obtain the modal distribution of the flame images and to demonstrate the spatial oscillation structure of the flame. The study finds that the convergent design of the single-head combustion chamber and the position of the igniter can lead to intense oscillations during combustion, which is of great significance for the subsequen

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2

He, Zhang-Ming, Deng-Long Wang, Yan-Chao She, Jian-Wen Ding, and Xiao-Hong Yan. "Nonperiodic Oscillation of Bright Solitons in Condensates with a Periodically Oscillating Harmonic Potential 10.5560/ZNA.2012-0085." Zeitschrift für Naturforschung A 67, no. 12 (2012): 723–28. http://dx.doi.org/10.5560/zna.2012-0085.

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Considering a periodically oscillating harmonic potential, we explored the dynamic properties of bright solitons in a Bose-Einstein condensate by using Darboux transformation. It is found that the soliton movement exhibits a nonperiodic oscillation under a slow oscillating potential, while it is hardly affected under a fast oscillating potential. Furthermore, the head-on and/or ‘chase’ collisions of two solitons have been obtained, which could be controlled by the oscillation frequency of the potential.

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Zhang, Kai, Bo Song, and Delan Zhu. "The Development of a Calculation Model for the Instantaneous Pressure Head of Oscillating Water Flow in a Pipeline." Water 11, no. 8 (2019): 1583. http://dx.doi.org/10.3390/w11081583.

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Sinusoidal oscillating water flow at low pressure can improve the anti-clogging ability of an emitter in drip irrigation or the water distribution of a nozzle in sprinkler irrigation and reduce the cost and energy consumption of the irrigation system. In this study, the characteristics of instantaneous pressure head attenuation of oscillating water flow along a pipeline have been investigated. By using a complex function to solve the continuity equation and the momentum equation of a pipeline with water hammer motion and using the Darcy–Weisbach formula to estimate the head loss, a calculation

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Li, Yan-Hom, and Shao-Chun Chen. "Propulsion Mechanism of Flexible Microbead Swimmers in the Low Reynolds Number Regime." Micromachines 11, no. 12 (2020): 1107. http://dx.doi.org/10.3390/mi11121107.

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A propulsion mechanism for a flexible microswimmer constructed from superparamagnetic microbeads with different diameters and subjected to an oscillating field was studied experimentally and theoretically herein. Various types of artificial swimmers with different bending patterns were fabricated to determine the flexibility and an effective waveform for a planar beating flagellum. Waveform evolutions for various swimmer configurations were studied to determine the flexible mechanism of the swimmers. A one-armed microswimmer can propel itself only if the friction of its wavelike body is anisot

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Xue, Zhenfeng, Chunfeng Zhao, and Junliang Tao. "Reducing penetration resistance through bio-inspired head oscillation." IOP Conference Series: Earth and Environmental Science 1337, no. 1 (2024): 012040. http://dx.doi.org/10.1088/1755-1315/1337/1/012040.

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Abstract Animals such as worm lizards can effectively bury themselves in the ground for survival. The burial behavior is realized due to the head oscillation of the reptiles using different strategies. It is hypothesized that the periodic penetration process generated from the anterior part of the animal reduces penetration resistance because it breaks the local force chains in the soil. In this paper, the three-dimensional discrete element method (DEM) modeling method was used to validate this hypothesis to investigate the interaction between a penetrator and the granular material at differen

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Samokhin, Alexey. "On Monotonic Pattern in Periodic Boundary Solutions of Cylindrical and Spherical Kortweg–De Vries–Burgers Equations." Symmetry 13, no. 2 (2021): 220. http://dx.doi.org/10.3390/sym13020220.

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We studied, for the Kortweg–de Vries–Burgers equations on cylindrical and spherical waves, the development of a regular profile starting from an equilibrium under a periodic perturbation at the boundary. The regular profile at the vicinity of perturbation looks like a periodical chain of shock fronts with decreasing amplitudes. Further on, shock fronts become decaying smooth quasi-periodic oscillations. After the oscillations cease, the wave develops as a monotonic convex wave, terminated by a head shock of a constant height and equal velocity. This velocity depends on integral characteristics

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Zhang, Kai, Baoxu Zhang, and Delan Zhu. "Development and Sensitivity Analysis of an Empirical Equation for Calculating the Amplitude of Pressure Head Loss of Oscillating Water Flow in Different Types of Pipe." Water 12, no. 9 (2020): 2421. http://dx.doi.org/10.3390/w12092421.

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Low pressure oscillating water flow can reduce the investment and energy consumption of irrigation. It is also effective in reducing the clogging of an emitter and improving the spraying quality of sprinklers. In order to overcome the problem of the complex process in calculating the amplitude of the pressure head loss of oscillating water flow in different types of pipes, in this study, an empirical equation for the amplitude of the pressure head loss of oscillating water flow in different types of pipe has been developed. Further, validation experiments have been conducted to verify the accu

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Ortega-Jimenez, Victor Manuel, and Robert Dudley. "Aerial shaking performance of wet Anna's hummingbirds." Journal of The Royal Society Interface 9, no. 70 (2011): 1093–99. http://dx.doi.org/10.1098/rsif.2011.0608.

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External wetting poses problems of immediate heat loss and long-term pathogen growth for vertebrates. Beyond these risks, the locomotor ability of smaller animals, and particularly of fliers, may be impaired by water adhering to the body. Here, we report on the remarkable ability of hummingbirds to perform rapid shakes in order to expel water from their plumage even while in flight. Kinematic performance of aerial versus non-aerial shakes (i.e. those performed while perching) was compared. Oscillation frequencies of the head, body and tail were lower in aerial shakes. Tangential speeds and acc

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9

IOALE', PAOLO, and DANTE GUIDARINI. "Methods for Producing Disturbances in Pigeon Homing Behaviour by Oscillating Magnetic Fields." Journal of Experimental Biology 116, no. 1 (1985): 109–20. http://dx.doi.org/10.1242/jeb.116.1.109.

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Experiments were performed with homing pigeons treated before release with oscillating magnetic fields produced by small Helmholtz coils placed around the neck and on the head of the pigeon or by larger Helmholtz coils surrounding the cage of the birds. In both types of treatment, which both used a single frequency of about 0.14 Hz, the pigeons' initial orientation was strongly affected when the oscillation of the artificial magnetic field was square-shaped, whereas a triangular or sine-shaped variation had no effect.

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Bulgakov, V., V. Adamchuk, І. Holovach, and Ye Ihnatiev. "Mathematical model of the movement of a towed machine for cleaning beet tops residues from root crop heads." Agricultural Science and Practice 4, no. 1 (2017): 3–10. http://dx.doi.org/10.15407/agrisp4.01.003.

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The work of a tractor-towed machine for cleaning beet top residues from root crop heads, when used with supporting pneumatic wheels, is accompanied with its oscillations in the vertical plane, which has consider- able impact on the quality of implementing the technological process. Therefore, the determination of opti- mal parameters for the cleaning machine, ensuring more stable movement of its cleaning working tool, in the longitudinal-vertical plane fi rst and foremost, is an important task of the mechanization of sugar beet grow- ing industry. Aim. To enhance the effi ciency of cleaning su

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Ohorodnyk, N., K. Smolianinov, and M. Ratsky. "Cellular and humoral immunity of carp at the action of biologically active additives." Agricultural Science and Practice 4, no. 1 (2017): 70–73. http://dx.doi.org/10.15407/agrisp4.01.070.

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The work of a tractor-towed machine for cleaning beet top residues from root crop heads, when used with supporting pneumatic wheels, is accompanied with its oscillations in the vertical plane, which has consider- able impact on the quality of implementing the technological process. Therefore, the determination of opti- mal parameters for the cleaning machine, ensuring more stable movement of its cleaning working tool, in the longitudinal-vertical plane fi rst and foremost, is an important task of the mechanization of sugar beet grow- ing industry. Aim. To enhance the effi ciency of cleaning su

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12

Malara, Giovanni, Kostas Belibassakis, Alexandros Magkouris, and Felice Arena. "VARIABLE BATHYMETRY EFFECTS ON THE RESPONSE OF U-OWC WAVE ENERGY CONVERTERS." Coastal Engineering Proceedings, no. 38 (May 29, 2025): 94. https://doi.org/10.9753/icce.v38.management.94.

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U-Oscillating Water Columns are wave energy harvesters commonly embedded in port infrastructures. They allow transforming a passive infrastructure (the vertical breakwater) into an active structure serving simultaneously the purpose of creating a sheltered basin and harvesting the incident wave energy for producing electrical energy. This article investigates the effect of bathymetry variability through the combination of a U-OWC dynamic model with a Boundary Element Method (BEM) – based solver accounting for irregular bathymetry. The BEM model used in this work has been applied to classical O

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Eleiwi, Muhammad A. "Study of the Resonance in Series Piping Systems with Oscillating Valve." Tikrit Journal of Engineering Sciences 18, no. 2 (2011): 45–61. http://dx.doi.org/10.25130/tjes.18.2.05.

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In This search, the phenomena of resonance in series piping systems with oscillating valve have been studied. The one-dimensional flow, unsteady state flow, and partial differential equations have been solved by using transfer matrix method.The details of the transfer matrix method, the derivation of the field matrices and point matrices, and procedures for determining the natural frequencies and frequency response of piping system are then presented. A computer program (Resonance) was developed to calculate the pressure and discharge oscillations at the valve, the phase angle between the pres

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14

Honami, S., T. Shizawa, A. Sato, and H. Ogata. "Flow Behavior With an Oscillating Motion of the Impinging Jet in a Dump Diffuser Combustor." Journal of Engineering for Gas Turbines and Power 118, no. 1 (1996): 65–71. http://dx.doi.org/10.1115/1.2816551.

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This paper presents flow behavior with an oscillating motion of an impinging jet upon a flame dome head and its reattachment to the casing wall, when a distorted flow is provided at the inlet of the dump diffuser combustor. A Laser-Doppler Velocimeter was used for the measurements of the time-averaged flow within a sudden expansion region. A surface pressure fluctuation survey on the flame dome head and flow visualization by a smoke wire technique with a high-speed video camera were conducted from the viewpoint of the unsteady flow features of the impinging jet. There exists a high-vorticity r

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15

Teixeira, Luis Augusto, Joane de Figueiredo Serpa Coutinho, and Daniel Boari Coelho. "Regulation of dynamic postural control to attend manual steadiness constraints." Journal of Neurophysiology 120, no. 2 (2018): 693–702. http://dx.doi.org/10.1152/jn.00941.2017.

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In daily living activities, performance of spatially accurate manual movements in upright stance depends on postural stability. In the present investigation, we aimed to evaluate the effect of the required manual steadiness (task constraint) on the regulation of dynamic postural control. A single group of young participants ( n = 20) were evaluated in the performance of a dual posturo-manual task of balancing on a platform oscillating in sinusoidal translations at 0.4-Hz (low) or 1-Hz (high) frequencies while stabilizing a cylinder on a handheld tray. Manual task constraint was manipulated by

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16

Yufeng Li, A. K. Menon, and M. Sullivan. "An oscillating tester for head/disk interface durability study." IEEE Transactions on Magnetics 31, no. 6 (1995): 3000–3002. http://dx.doi.org/10.1109/20.490250.

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Boeddeker, Norbert, and Jan M. Hemmi. "Visual gaze control during peering flight manoeuvres in honeybees." Proceedings of the Royal Society B: Biological Sciences 277, no. 1685 (2009): 1209–17. http://dx.doi.org/10.1098/rspb.2009.1928.

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As animals travel through the environment, powerful reflexes help stabilize their gaze by actively maintaining head and eyes in a level orientation. Gaze stabilization reduces motion blur and prevents image rotations. It also assists in depth perception based on translational optic flow. Here we describe side-to-side flight manoeuvres in honeybees and investigate how the bees’ gaze is stabilized against rotations during these movements. We used high-speed video equipment to record flight paths and head movements in honeybees visiting a feeder. We show that during their approach, bees generate

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18

Gioanni, Henri, Annie Sansonetti, and Mohamed Bennis. "Characteristics of cervico-ocular responses in the chameleon." Visual Neuroscience 14, no. 6 (1997): 1175–84. http://dx.doi.org/10.1017/s095252380001186x.

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AbstractThe cervico-ocular reflex (COR) was investigated in the chameleon. Two kinds of responses were observed by oscillating the body (sine-wave stimuli) in the fixed-head animal: a "smooth response" of very low gain (around 0.08) and a saccadic response composed of 1–12 saccades per cycle of stimulation (depending on the stimulation frequency). Both responses were elicited in the compensatory direction (same direction as the stimulation) and exhibited a frequency dependence with low-pass properties. The saccadic response was especially developed and displayed a higher gain (up to 0.4) than

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Convertino, V. A., F. H. Previc, D. A. Ludwig, and E. J. Engelken. "Effects of vestibular and oculomotor stimulation on responsiveness of the carotid-cardiac baroreflex." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 273, no. 2 (1997): R615—R622. http://dx.doi.org/10.1152/ajpregu.1997.273.2.r615.

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Twelve healthy men underwent measurement of their carotid-cardiac baroreflex response during varying conditions of vestibulo-oculomotor stimulation to test the hypothesis that vestibular and/or oculomotor stimulation associated with head movements in the yaw plane inhibit baroreflex control of heart rate. We assessed the carotid-cardiac baroreflex response by plotting R-R intervals (in milliseconds) at each of eight neck pressure steps with their respective carotid distending pressures (in millimeters mercury). Baroreflex sensitivity was measured under four experimental conditions: 1) sinusoid

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20

Reddy, Puli Vishnu Vardhan, Pushkin Raj, Mohammed Shafiuzama, Shiju Simon, Sindhu R., and Saran S. "Effective Surgical Management of Femoralhead Affections in Dogs: Review of Ten Cases." Archives of Current Research International 24, no. 5 (2024): 185–90. http://dx.doi.org/10.9734/acri/2024/v24i5695.

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Ten dogs suffering from various conditions affecting the coxofemoral joint, including hip dysplasia, hip luxation, and femoral capital fractures, were included in the study. Nine of these dogs underwent treatment with femoral head osteotomy, while one case of hip luxation was treated using a toggle technique. All procedures involved a cranio-lateral incision approach and osteotomy performed with an oscillating saw. Following physiotherapy and passive range of motion exercises, all the dogs exhibited pain-free ambulation. The simple Femoral Head Ostectomy surgery effectively manages various fem

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Mark, Erwin P., Michael A. O. Lewis, Filippo Graziani, Boris Atlas, and Joern Utsch. "Droplet Sizes Emitted from Demonstration Electric Toothbrushes." International Journal of Environmental Research and Public Health 18, no. 5 (2021): 2320. http://dx.doi.org/10.3390/ijerph18052320.

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The COVID-19 pandemic has drawn attention to microbial transmission risk via aerosols in dental practice. Demonstration electric toothbrushes are used intra-orally for education. The aim of this investigation was to measure the size of droplets emitted by the brush head of two demonstration oscillating-rotating electric toothbrushes. Measurement of droplet production and size was recorded in vitro using three methods: (1) Malvern Spraytec (LASER particle size measurement device with detectable particle size of 0.1–2500 µm) and brushes mounted on a 3D-printed, two-shell form-fit fixture with a

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Aoki, Reiko, Manabu Enoki, and Ryo Yoshida. "Measurement of Elastic Properties of Self-Oscillating Gel." Key Engineering Materials 321-323 (October 2006): 1036–39. http://dx.doi.org/10.4028/www.scientific.net/kem.321-323.1036.

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Self-oscillating gel is designed by copolymerizing the catalyst for the Belousov- Zhabotinsky (BZ) reaction with thermosensitive polymer. The cylindrical-shaped specimens of NIPAAm-co-(Ru(bpy)3 gel were prepared by copolymerizing (Ru(bpy)3) monomer as catalyst with NIPAAm as thermosensitive polymer. Tensile tests were performed with cross-head speed of 10 )m/s in pure water at 20°C. Stress-strain curves were plotted using tensile load measured by semiconductor gauge and strains calculated from observation of the gel. Fracture strain and Young’s modulus were obtained from these curves. Also Poi

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Adachi, Seiji. "Time-domain simulation of a recorder using the model of a jet allowed to deflect overall." Journal of the Acoustical Society of America 155, no. 3_Supplement (2024): A195. http://dx.doi.org/10.1121/10.0027279.

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A sound production model of the flute-like instrument which allows the jet to deflect overall has been proposed recently. The overall deflection is introduced to satisfy flow consistency at the instrument's window (embouchure hole or mouth), i.e., the condition that the volume velocity swept by the oscillating jet should be equal to that through the window. The full oscillation of the jet is the sum of the deflection and the oscillation caused by fluid dynamical sinuous instability. This model can correctly reproduce the reflection function of a recorder's head as seen from the resonator. The

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Erbe, Christina, Collin Jacobs, Malgorzata Klukowska, Hans Timm, Julie Grender, and Heinrich Wehrbein. "A randomized clinical trial to evaluate the plaque removal efficacy of an oscillating-rotating toothbrush versus a sonic toothbrush in orthodontic patients using digital imaging analysis of the anterior dentition." Angle Orthodontist 89, no. 3 (2018): 385–90. http://dx.doi.org/10.2319/080317-520.1.

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ABSTRACT Objective: To compare the plaque removal efficacy of an oscillating-rotating electric toothbrush with an orthodontic brush head versus a sonic toothbrush in adolescent patients with fixed orthodontic appliances. Materials and Methods: This was a randomized, examiner-blind, replicate single-use, two-treatment, four-period, crossover study with a washout period between visits of approximately 24 hours. Forty-four adolescent patients with fixed orthodontic appliances in both arches were randomized based on a computer-generated randomization schedule to one of four toothbrush treatment se

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Cosson-Coche, Quentin, Olivier Cahuc, Philippe Darnis, Raynald Laheurte, Denis Teissandier, and Didier Chabirand. "Experimental study on cutting flexible sheet materials using an oscillating knife." International Journal of Clothing Science and Technology 29, no. 3 (2017): 349–65. http://dx.doi.org/10.1108/ijcst-05-2016-0058.

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Purpose The purpose of this paper is to understand the impact of the cutting forces on the quality of pieces in industrial cutting of multi-ply textile material. It also tries to establish a cutting model that can simulate the cutting forces in order to understand the behaviour of the blade. Design/methodology/approach Working on an industrial machine, a cutting head with an oscillating knife is instrumented with different sensors. Using this equipment, cutting forces can be analysed experimentally while the fabric is being cut along a straight line. Findings A model of the physical phenomena

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Porter, Marianne E., Braden T. Ruddy, and Stephen M. Kajiura. "Volitional Swimming Kinematics of Blacktip Sharks, Carcharhinus limbatus, in the Wild." Drones 4, no. 4 (2020): 78. http://dx.doi.org/10.3390/drones4040078.

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Recent work showed that two species of hammerhead sharks operated as a double oscillating system, where frequency and amplitude differed in the anterior and posterior parts of the body. We hypothesized that a double oscillating system would be present in a large, volitionally swimming, conventionally shaped carcharhinid shark. Swimming kinematics analyses provide quantification to mechanistically examine swimming within and among species. Here, we quantify blacktip shark (Carcharhinus limbatus) volitional swimming kinematics under natural conditions to assess variation between anterior and pos

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Pardo, A., A. Zangani, P. Montagna, et al. "Comparison of Plaque Removal Efficacy Between Sonic, Roto-Oscillating, and Manual Toothbrushes in Patients Undergoing Fixed Orthodontic Therapy: a Systematic Review." Journal of Applied Cosmetology 43, no. 1 (2025): 58/70. https://doi.org/10.56609/jac.v43i1.463.

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Orthodontic treatment, especially fixed orthodontic treatment, increases the amount of plaque in the oral cavity due to the difficulty in brushing because of the presence of brackets. The aim of this systematic review was to compare different types of toothbrushes, that is, sonic, roto-oscillating, and manual, to determine the best method for removing plaque during treatment with fixed orthodontics. The review was conducted using the PubMed and Cochrane Library databases. The 2020 PRISMA guidelines were used for this study. Nine studies between 2013 and 2023 were included, two of which conside

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Dotlic, Milan, Boris Pokorni, Milenko Pusic, and Milan Dimkic. "Non-linear multi-point flux approximation in the near-well region." Filomat 32, no. 20 (2018): 6857–67. http://dx.doi.org/10.2298/fil1820857d.

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We consider non-linear multi-point flux approximations (MPFA) scheme for flow simulations in a model of anisotropic porous medium that includes wells. The hydraulic head varies logarithmically and its gradient changes rapidly in the well vicinity. Due to this strong non-linearity of the near-well flow, use of the MPFA scheme in the near well region results in a completely wrong total well flux and an inaccurate hydraulic head distribution. In this article we propose correction of the MPFA scheme. The outcome is a scheme that is second-order accurate even in the well vicinity for anisotropic me

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Liu, C. C. "Numerical Investigation of the transient process of direct collision between two droplets." Journal of Physics: Conference Series 2878, no. 1 (2024): 012003. http://dx.doi.org/10.1088/1742-6596/2878/1/012003.

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Abstract The use of spray systems finds widespread applications in fields such as national defense and industry. These systems are employed for spray cooling, spray forming, spray coating, and inkjet painting. Within spray systems, atomized droplets play a crucial role, either impacting surfaces or colliding with each other. Understanding the impact process of these droplets is essential for optimizing spray system performance. In this study, computational simulations focus on direct collision of two droplets. Numerical methods are employed, including structured single-block and staggered grid

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Zhu, Renchuan, Guoping Miao, and Zhaowei Lin. "Numerical Research on FPSOs With Green Water Occurrence." Journal of Ship Research 53, no. 01 (2009): 7–18. http://dx.doi.org/10.5957/jsr.2009.53.1.7.

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Green water loads on sailing ships or floating structures occur when an incoming wave significantly exceeds freeboard and water runs onto the deck. In this paper, numerical programs developed based on the platform of the commercial software Fluent were used to numerically model green water occurrence on floating structures exposed to waves. The phenomena of the fixed floating production, storage, and offloading unit (FPSO) model and oscillating vessels in head waves have been simulated and analyzed. For the oscillating floating body case, a combination idea is presented in which the motions of

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Fujiwara, T., Shinya Tsukamoto, and M. Miyagawa. "Analysis of the Grinding Mechanism with Wheel Head Oscillating Type CNC Crankshaft Pin Grinder." Key Engineering Materials 291-292 (August 2005): 163–70. http://dx.doi.org/10.4028/www.scientific.net/kem.291-292.163.

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In this study, the crankshaft pin grinding mechanism, which is carried out with wheel head oscillating type CNC crankshaft pin grinder, is theoretically analyzed. In order to maintain grinding process, the pin rotates and also rocks along wheel working surface, because the wheel head oscillates with journal rotation. Then, it is made clear that cylindrical plunge grinding process progresses in the pin grinding process for the first time. Therefore, grinding speed ratio, which is defined as ratio of substantial pin surface speed to wheel surface speed, is firstly formulated. Secondly, undeforme

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Ishijima, Sumio. "Dynamics of flagellar force generated by a hyperactivated spermatozoon." REPRODUCTION 142, no. 3 (2011): 409–15. http://dx.doi.org/10.1530/rep-10-0445.

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The flagellar force generated by a hyperactivated monkey spermatozoon was evaluated using the resistive force theory applied to the activated (nonhyperactivated) and hyperactivated flagellar waves that were obtained using high-speed video microscopy and digital image processing in order to clarify the mechanism of sperm penetration through the zona pellucida. No difference in the maximum propulsive force, which was parallel to the longitudinal sperm head axis, was found between the activated and hyperactivated spermatozoa. The maximum transverse force (45 pN), which was perpendicular to the lo

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Pothier, David D., Cian Hughes, Wanda Dillon, Paul J. Ranalli, and John A. Rutka. "The Use of Real-Time Image Stabilization and Augmented Reality Eyewear in the Treatment of Oscillopsia." Otolaryngology–Head and Neck Surgery 146, no. 6 (2012): 966–71. http://dx.doi.org/10.1177/0194599811434708.

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Objectives/Hypothesis. The symptom of oscillopsia in patients with bilateral vestibular loss (BVL) can be reduced as dynamic visual acuity (DVA), the reduction in visual acuity during head movement, is improved by using real-time image stabilization, delivered by augmented reality eyewear. Setting. Tertiary multidisciplinary neurotology clinic. Study Design. Prospective experimental study. Methods. Immersive virtual reality glasses used in combination with a compact digital video camera were used. A software algorithm was developed that used a center-weighted Lucas-Kanade optical flow method t

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Giofré, Valeria. "Functions and distribution of determiners in Old English genitive noun phrases." Brno studies in English, no. 1 (2022): 25–50. http://dx.doi.org/10.5817/bse2022-1-2.

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This paper aims to investigate the distribution and function of the determiners sē, sēo, þæt in Old English genitive noun phrases. The hypotheses presented stem from the analysis of the Old English version of Bede's "Historia Ecclesiastica Gentis Anglorum". Data shows, on the one hand, that determiners display a peculiar distribution, as their position varies according to the relative order of the genitive modifier and the head noun in genitive noun phrases, be it "genitive+noun" or "noun+genitive". On the other hand, their function does not seem to be as clear-cut as is usually described in g

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Ostermann, Florian, Rene Woszidlo, C. Navid Nayeri, and C. Oliver Paschereit. "Properties of a sweeping jet emitted from a fluidic oscillator." Journal of Fluid Mechanics 857 (October 22, 2018): 216–38. http://dx.doi.org/10.1017/jfm.2018.739.

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This experimental study investigates the flow field and properties of a sweeping jet emitted from a fluidic oscillator into a quiescent environment. The aspect ratio of the outlet throat is 1. Stereoscopic particle image velocimetry is employed to measure the velocity field plane-by-plane. Simultaneously acquired pressure measurements provide a reference for phase correlating the individual planes yielding three-dimensional, time-resolved velocity information. Lagrangian and Eulerian visualization techniques illustrate the phase-averaged flow field. Circular head vortices, similar to the start

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Soutar, Anne, Monika Watt, John W. Cherrie, and Anthony Seaton. "Comparison between a personal PM10 sampling head and the tapered element oscillating microbalance (TEOM) system." Atmospheric Environment 33, no. 27 (1999): 4373–77. http://dx.doi.org/10.1016/s1352-2310(99)00227-7.

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IMAI, Koki, Shintaro ITOH, Kenji FUKUZAWA, Yuya HAMAMOTO, and Hedong ZHANG. "HDI-05 HIGH-SPEED TRIBOLOGICAL MEASUREMENT BY USING OSCILLATING OPTICAL FIBER PROBE(Head/Disk Interface and Tribology II,Technical Program of Oral Presentations)." Proceedings of JSME-IIP/ASME-ISPS Joint Conference on Micromechatronics for Information and Precision Equipment : IIP/ISPS joint MIPE 2009 (2009): 109–10. http://dx.doi.org/10.1299/jsmemipe.2009.109.

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Wilkinson, Michael G. T., XingYao Wang, Noah J. Cowan, and Cynthia F. Moss. "Adaptive behavior in sonar prey tracking tasks: Empirical data and modeling." Journal of the Acoustical Society of America 153, no. 3_supplement (2023): A94. http://dx.doi.org/10.1121/10.0018282.

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Echolocating bats can discriminate small differences in target range (Simmons, 1973) and show a clutter interference zone along the range axis of 8–9 cm (Simmons et al., 1988). Because bats use an active sensing system, they can employ various strategies to mitigate the effects of clutter. We studied clutter rejection behaviors of the big brown bat, Eptesicus fuscus, as it tracked a moving target under controlled conditions. We also created data-driven models using control theory and system identification techniques to evaluate oscillating target motion tracking strategies. We trained bats to

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Liu, Wenzhao, Yu Li, Xiping Mo, Yong Chai, and Houqi Wang. "A triple-resonant Janus-Helmholtz transducer." Journal of the Acoustical Society of America 157, no. 6 (2025): 4136–56. https://doi.org/10.1121/10.0036815.

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The Janus–Helmholtz (JH) transducer is an underwater acoustic device that utilizes longitudinal resonance (LR) and liquid cavity resonance (LCR) to produce low-frequency, broadband acoustic emissions. However, attempts to enhance coupling with the flexural resonance (FR) of the radiation head have demonstrated that effective interaction between FR and LCR remains unachieved, thereby constraining the operational bandwidth of the JH transducer. This study addresses this limitation by proposing a sound field model for the JH transducer under flexural vibration and elucidates the inherent physical

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Sun, Qizong, Ertian Hua, Liying Sun, Linfeng Qiu, Yabo Song, and Mingwang Xiang. "Study on the Hydrodynamic Performance of Swing-Type Flapping Hydrofoil Bionic Pumps Affected by Foil Camber." Water 16, no. 4 (2024): 595. http://dx.doi.org/10.3390/w16040595.

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The flapping hydrofoil bionic pump is an innovative hydrodynamic device that utilizes flapping hydrofoil technology. Flapping hydrofoil bionic pumps are crucial in addressing issues like inadequate river hydropower and limited water purification capabilities in flat river network regions. Optimizing the foil characteristics is essential for enhancing the hydrodynamic efficiency of the flapping hydrofoil bionic pump. This study investigates the impact of foil camber parameters on the hydrodynamic performance of swing-type asymmetric flapping bionic pumps. The NACA series standard foils with var

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Grau, Jan, Pavel Souček, and Matěj Sulitka. "The Influence of Servo Drive Control on the NC Vertical Milling Machine Dynamic Compliance." Journal of Manufacturing and Materials Processing 4, no. 4 (2020): 111. http://dx.doi.org/10.3390/jmmp4040111.

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A model Numerical Control (NC) machine tool dynamic compliance is analyzed, including the influence of its mechanical structure and position control feed drive algorithms. The dynamic model of the machine tool is divided into two main parts, which are closest to the machining process. First, the milling head assembly group is presented as a system of one mass oscillating in a 2D plane and 3D space. Second, the motion axes assembly group, XY cross table with linear feed drive, is presented. A square 2×2 dimension matrix of the total dynamic compliance is evaluated within the feed drive control

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Mandekolu, Balakrishna Yashoda, and Vrinda Shivashetty. "Device-to-device based path selection for post disaster communication using hybrid intelligence." International Journal of Electrical and Computer Engineering (IJECE) 14, no. 1 (2024): 796–810. https://doi.org/10.11591/ijece.v14i1.pp796-810.

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Public safety network communication methods are concurrence with emerging networks to provide enhanced strategies and services for catastrophe management. If the cellular network is damaged after a calamity, a new-generation network like the internet of things (IoT) is ready to assure network access. In this paper, we suggested a framework of hybrid intelligence to find and re-connect the isolated nodes to the functional area to save life. We look at a situation in which the devices in the hazard region can constantly monitor the radio environment to self-detect the occurrence of a disaster, s

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Chapuis, Robert P. "The Physical Reasons to Have Underdamped or Oscillating Variable-Head (Slug) Tests: A Review and a Clarification." Geotechnical Testing Journal 45, no. 1 (2021): 20210065. http://dx.doi.org/10.1520/gtj20210065.

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TOUCH, Narong, Shogo FUKUI, Shinya NAKASHITA, Shoji FUKUOKA, and Tadashi HIBINO. "PERMEABILITY CHANGE OF SAND BEDS DUE TO SEDIMENT MIGRATION UNDER SEEPAGE FLOW WITH OSCILLATING WATER HEAD CONDITION." Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 69, no. 4 (2013): I_559—I_564. http://dx.doi.org/10.2208/jscejhe.69.i_559.

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De Nunzio, Alessandro M., Antonio Nardone, and Marco Schieppati. "Head stabilization on a continuously oscillating platform: the effect of a proprioceptive disturbance on the balancing strategy." Experimental Brain Research 165, no. 2 (2005): 261–72. http://dx.doi.org/10.1007/s00221-005-2297-7.

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Zalewski-Zaragoza, Robert Aureo, and Erik Scott Viirre. "Quantitative measurement of vertigo frequency: Preliminary results." Journal of Vestibular Research 13, no. 1 (2003): 53–56. http://dx.doi.org/10.3233/ves-2003-13106.

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Persons who experience vertigo often describe their symptoms as a sensation of oscillations. Based on such a description, a pilot study was performed to determine if the frequency of the vertigo sensation could be quantified in a manner analogous to tone matching in tinnitus treatment. Fifteen subjects were tested using a virtual image system that consisted of a head mounted display showing a scene that oscillated horizontally or vertically at an adjustable frequency. Subjects were asked to adjust the direction and frequency to match their typical vertigo sensation. Results show that most pers

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M., Balakrishna Yashoda, and Vrinda Shivashetty. "Energy-efficient device-to-device communication in internet of things using hybrid optimization technique." International Journal of Electrical and Computer Engineering (IJECE) 13, no. 5 (2023): 5418–30. https://doi.org/10.11591/ijece.v13i5.pp5418-5430.

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Device-to-device (D2D) communication has grown into notoriety as a critical component of the internet of things (IoT). One of the primary limitations of IoT devices is restricted battery source. D2D communication is the direct contact between the participating devices that improves the data rate and delivers the data quickly by consuming less battery. An energy-efficient communication method is required to enhance the communication lifetime of the network by reducing the node energy dissipation. The clustering-based D2D communication method is maximally acceptable to boom the durability of a n

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EL BAROUDI, ADIL, and FULGENCE RAZAFIMAHERY. "THEORETICAL AND NUMERICAL INVESTIGATIONS OF FREQUENCY ANALYSIS OF TWO CIRCULAR CYLINDERS OSCILLATING IN A INCOMPRESSIBLE VISCOUS FLUID." International Journal of Applied Mechanics 06, no. 05 (2014): 1450049. http://dx.doi.org/10.1142/s1758825114500495.

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A potential flow is presented in this paper for the analysis of the fluid-structure interaction systems including, but not limited to, the idealized human head. The model considers a cerebro-spinal fluid (CSF) medium interacting with two solid domain. The fluid field is governed by the linearized Navier–Stokes equation. A potential technique is used to obtain a general solution for a problem. The method consists in solving analytically partial differential equations obtained from the linearized Navier–Stokes equation. From the solution, modal shapes and stokes cells are shown. In the analysis,

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Atrushkevitch, V. G., V. N. Tsarev, L. U. Orekhova, L. A. Elizova, and E. S. Loboda. "Comparative evaluation of the effectiveness in plaque removal from the tooth surface by electric toothbrushes with different types of bristle movement." Stomatologist. Minsk, no. 4(31) (December 2018): 58–63. http://dx.doi.org/10.32993/stomatologist.2018.4(31).11.

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Supportive periodontal therapy (SPT) is an important factor in maintaining the results of active treatment of periodontal disease. Selection of effective personal hygienic tools is very important in addition to the formation of sustainable hygienic skills in patients. The aim of the study is a comparative assessment of the quality of mechanical removal of a native microbial biofilm with toothbrushes with different types of head rotation and a manual toothbrush. Objects and methods. The extracted teeth were fixed in plaster models, and the vestibular surface of the three teeth was processed for

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Costa, Daniel de Oliveira, Antonio Carlos Fernandes, and Joel Sena Sales Junior. "Optimization of system of Oscillating Water Columns to mitigate pitch response of FPSO platforms submitted to head waves." Ocean Engineering 286 (October 2023): 115729. http://dx.doi.org/10.1016/j.oceaneng.2023.115729.

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