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Journal articles on the topic 'Parabolic cups'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

B., Sumanth Kumar *. G. Devendar A. Chennakesava Reddy. "FORMABILITY ANALYSIS OF PARABOLIC CUPS DRAWN FROM Ni 201 USING SINGLE POINT INCREMENTAL FORMING PROCESS." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 6, no. 5 (2017): 619–28. https://doi.org/10.5281/zenodo.800628.

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Numerical simulation of single point incremental forming process (SPIF) for Ni 201 sheet material was carried out using finite element analysis software and Taguchi experimental techniques. Reduction in thickness during SPIF process of the parabolic cups was estimated. Formability diagrams were drawn based on minor and major strains, and normalized major and minor stresses. The significant process parameters were identified using analysis of variance (ANOVA). Local thing along the walls of the parabolic cups were also estimated. It has been found that the maximum thinning ranges from 58% to 61

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2

Pedersen, Troels Friis, and Jan-Åke Dahlberg. "Modelling of cup anemometry and dynamic overspeeding in average wind speed measurements." Atmospheric Measurement Techniques 17, no. 5 (2024): 1441–61. http://dx.doi.org/10.5194/amt-17-1441-2024.

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Abstract. Cup anemometers measure average wind speed in the atmosphere and have been used for one and a half centuries by meteorologists. Within the last half century, cup anemometers have been used extensively in wind energy to measure wind resources and performance of wind turbines. Meteorologists researched cup anemometer behaviour and found dynamic overspeeding to be an inherent and significant systematic error. The wind energy community has strong accuracy requirements for power performance measurements on wind turbines, and this led in the last 2 decades to new research on cup anemometer

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3

Ibragimov, A. A., A. К. Karakhanov, A. A. Abdurakhmanov, A. Е. Eshdavlatov, P. A. Uteniyazov, and A. A. Khadzhiev. "Research Results for a New Onion Seed Drill." Agricultural Machinery and Technologies 14, no. 4 (2020): 12–16. http://dx.doi.org/10.22314/2073-7599-2020-14-4-12-16.

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. For sowing small seeds of vegetables, in particular onions, special seeders are used. They are not produced in the Republic of Uzbekistan, while many diff erent pneumatic seeders are produced abroad. The authors note that foreign samples are complex in design, not adapted to local soil and climatic conditions, cannot provide even seed placement on ridges, and the cost of the seeders themselves and service are very high.(Research purpose) To develop a vegetable seeder in relation to the soil and climatic conditions of Uzbekistan, to determine the seeding rate of onion seeds depending on the l

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4

Jörges, Björn, Lena Hagenfeld, and Joan López-Moliner. "The use of visual cues in gravity judgements on parabolic motion." Vision Research 149 (August 2018): 47–58. http://dx.doi.org/10.1016/j.visres.2018.06.002.

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5

Jenkin, Michael, James Zacher, Richard Dyde, Laurence Harris, and Heather Jenkin. "Perceptual Upright: The Relative Effectiveness of Dynamic and Static Images Under Different Gravity States." Seeing and Perceiving 24, no. 1 (2011): 53–64. http://dx.doi.org/10.1163/187847511x555292.

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AbstractThe perceived direction of up depends on both gravity and visual cues to orientation. Static visual cues to orientation have been shown to be less effective in influencing the perception of upright (PU) under microgravity conditions than they are on earth (Dyde et al., 2009). Here we introduce dynamic orientation cues into the visual background to ascertain whether they might increase the effectiveness of visual cues in defining the PU under different gravity conditions. Brief periods of microgravity and hypergravity were created using parabolic flight. Observers viewed a polarized, na

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6

Oman, C. M., C. F. Pouliot, and A. Natapoff. "Horizontal angular VOR changes in orbital and parabolic flight: human neurovestibular studies on SLS-2." Journal of Applied Physiology 81, no. 1 (1996): 69–81. http://dx.doi.org/10.1152/jappl.1996.81.1.69.

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Further evidence was found for adaptive changes in the vestibular "velocity storage" (VS) component of the vestibuloocular reflex in four shuttle astronauts tested in parabolic flight and before, during, and after a 14-day mission. Nystagmus was recorded during and after 1 min of 120 degrees/s rotation. Gains and time constants were determined by computer analysis. Responses correlated with experience. Two subjects were making their first spaceflight. In parabolic flight, their time constants shortened to an average of 60% of 1 G values, presumably because unfamiliar otolith cues reduced VS. H

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7

Shelhamer, Mark, Richard A. Clendaniel, and Dale C. Roberts. "Context-specific adaptation of saccade gain in parabolic flight." Journal of Vestibular Research 12, no. 5-6 (2003): 211–21. http://dx.doi.org/10.3233/ves-2003-125-603.

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Previous studies established that vestibular reflexes can have two adapted states (e.g., gains) simultaneously, and that a context cue (e.g., vertical eye position) can switch between the two states. Our earlier work demonstrated this phenomenon of context-specific adaptation for saccadic eye movements: we asked for gain decrease in one context state and gain increase in another context state, and then determined if a change in the context state would invoke switching between the adapted states. Horizontal and vertical eye position and head orientation could serve, to varying degrees, as cues

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8

Prsa, Mario, Danilo Jimenez-Rezende, and Olaf Blanke. "Inference of perceptual priors from path dynamics of passive self-motion." Journal of Neurophysiology 113, no. 5 (2015): 1400–1413. http://dx.doi.org/10.1152/jn.00755.2014.

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The monitoring of one's own spatial orientation depends on the ability to estimate successive self-motion cues accurately. This process has become to be known as path integration. A feature of sequential cue estimation, in general, is that the history of previously experienced stimuli, or priors, biases perception. Here, we investigate how during angular path integration, the prior imparted by the displacement path dynamics affects the translation of vestibular sensations into perceptual estimates. Subjects received successive whole-body yaw rotations and were instructed to report their positi

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9

Lackner, James R. "Spatial Orientation in Weightless Environments." Perception 21, no. 6 (1992): 803–12. http://dx.doi.org/10.1068/p210803.

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Illusions of body inversion and of vehicle inversion can be evoked by exposure to weightlessness in the microgravity conditions of orbital and parabolic flight. Such illusions can involve all possible combinations of self-inversion and vehicle inversion. In the absence of any patterns of external stimulation, individuals may lose all sense of body orientation to their surroundings while retaining a sense of their overall body configuration and cognitive awareness of their actual position. Touch and pressure cues provide a perceptual ‘down’ in the absence of visual input. When vision is allowed

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10

Buckley, D., J. P. Frisby, V. J. Aranaz, and M. M. Lipson. "Why Do Some People Take a Long Time to See Complex Random-Dot Stereograms?" Perception 26, no. 1_suppl (1997): 102. http://dx.doi.org/10.1068/v970049.

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Some observers take a long time to see the appropriate surface shapes depicted in complex random-dot stereograms (RDSs) whereas others report seeing them quickly. We have hypothesised that this may be due in part to some observers being more affected than others by the cue conflicts that are typically present in RDSs, for which disparity is often at odds with accommodation, texture, and outline shape cues. We report two experiments in which we investigated whether a measure of dominance of texture/outline cues over disparity cues in stereograms of ridges could predict latencies to see RDSs of

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11

Gonzalez-Terrazas, Tania P., Carlos Martel, Paulo Milet-Pinheiro, Manfred Ayasse, Elisabeth K. V. Kalko, and Marco Tschapka. "Finding flowers in the dark: nectar-feeding bats integrate olfaction and echolocation while foraging for nectar." Royal Society Open Science 3, no. 8 (2016): 160199. http://dx.doi.org/10.1098/rsos.160199.

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Nectar-feeding bats depend mainly on floral nectar to fulfil their energetic requirements. Chiropterophilous flowers generally present strong floral scents and provide conspicuous acoustic echoes to attract bats. While floral scents are assumed to attract bats over long distances, acoustic properties of flower structures may provide detailed information, thus supporting the localization of a flower at close ranges. So far, to our knowledge, there is no study trying to understand the relative importance as well as the combination of these generally coupled cues for detection (presence) and loca

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12

Gonzalez-Terrazas, Tania P., Carlos Martel, Paulo Milet-Pinheiro, Manfred Ayasse, Elisabeth K. V. Kalko, and Marco Tschapka. "Finding flowers in the dark: nectar-feeding bats integrate olfaction and echolocation while foraging for nectar." Royal Society Open Science 3, no. 8 (2016): 160199. https://doi.org/10.5281/zenodo.14818736.

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(Uploaded by Plazi for the Bat Literature Project) Nectar-feeding bats depend mainly on floral nectar to fulfil their energetic requirements. Chiropterophilous flowers generally present strong floral scents and provide conspicuous acoustic echoes to attract bats. While floral scents are assumed to attract bats over long distances, acoustic properties of flower structures may provide detailed information, thus supporting the localization of a flower at close ranges. So far, to our knowledge, there is no study trying to understand the relative importance as well as the combination of these gener

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13

Jenkin, H. L., R. T. Dyde, J. E. Zacher, et al. "The relative role of visual and non-visual cues in determining the perceived direction of “up”: Experiments in parabolic flight." Acta Astronautica 56, no. 9-12 (2005): 1025–32. http://dx.doi.org/10.1016/j.actaastro.2005.01.030.

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14

Mittelstaedt, H., and S. Glasauer. "Crucial Effects of Weightlessness on Human Orientation." Journal of Vestibular Research 3, no. 3 (1993): 307–14. http://dx.doi.org/10.3233/ves-1993-3311.

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This contribution examines the consequences of two remarkable experiences of subjects in weightlessness, 1) the missing of sensations of trunk tilt and of the respective concomitant reflexes when the head is tilted with respect to the trunk, and 2) the persistence of a perception of “up” and “down,” that is, of the polarity of the subjective vertical (SV) in the absence of, as well as in contradiction to, visual cues. The first disproves that the necessary head-to-trunk coordinate transformation be achieved by adding representations of the respective angles gained by utricles and neck receptor

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15

Fatima, Tahira, John R. Teasdale, Jim Bunce, and Autar K. Mattoo. "Tomato response to legume cover crop and nitrogen: differing enhancement patterns of fruit yield, photosynthesis and gene expression." Functional Plant Biology 39, no. 3 (2012): 246. http://dx.doi.org/10.1071/fp11240.

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Excessive use of nitrogen (N) in crop production has impacted ecosystems by contaminating soil and water. Management of N in agriculture is therefore of global concern. Sustainable agriculture systems that use leguminous cover crops such as hairy vetch (Vicia villosa Roth) to fix N and enrich soil organic matter by fixing carbon provide an alternative strategy. N signalling pathways were found associated with delayed leaf senescence and disease tolerance of hairy vetch-grown tomatoes. To test whether N in hairy vetch is the only contributing factor leading to these phenotypes, we designed a po

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16

Guerrero, Villar Francisca, Vicente Rubén Dorado, Matej Fike, and Eloisa Torres-Jimenez. "Influence of ambient conditions on wind speed measurement: Impact on the annual energy production assessment." Energy Conversion and Management 195 (September 1, 2019): 1111–23. https://doi.org/10.1016/j.enconman.2019.05.067.

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The Annual Energy Production (AEP) estimations are crucial to analyze the potential of wind energy projects. To calculate the AEP of a wind farm, it is necessary to accurately measure the wind speed, because small errors in these measures lead to significant deviations in the wind turbine power curve. In-field wind speed is usually measured by means of cup anemometers, which are calibrated within wind tunnels. In-field ambient conditions differ from those at the laboratory, which increases the uncertainty of the wind speed measures performed at the location of the turbine. The present work is

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17

Chou, Tse-Ya, Ding-Chin Chou, and Ling-Guei Gao. "The Implementation and Design of a Multi-Reflector Cup for LED Lighting." GSTF Journal of Engineering Technology 4, no. 1 (2016). http://dx.doi.org/10.7603/s40707-016-0018-1.

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AbstractIn recent years, the luminous efficacy of light emitting diodes (LEDs) has met energy conservation requirements. However, in lighting applications, lighting instruments must be appropriately applied to illuminate regions of interest. In this study, the LED AR111 downlight was used as an example to limit beam areas within a preset illuminating range. The TRIZ method was applied to generate ideas for product design concepts. We proposed installing replaceable gratings on LED lighting instruments, three types of multi-reflector cups that can be installed at various angles were designed fo

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18

Liu, Deze, and Daniel Burbano. "Collective intermittent exploration in fish schools is mediated by visual cues." Royal Society Open Science 12, no. 6 (2025). https://doi.org/10.1098/rsos.250033.

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Exploratory behaviour is fundamental to animal collectives, directly influencing fitness through resource acquisition and predator avoidance. Despite its ecological significance, the processes governing when and how animals initiate exploration in social contexts under varying sensory inputs remain poorly understood. Here, we investigate how the number of individuals and illumination (modulating visual input) influence zebrafish exploratory behaviour. Visual cues were quantified via opacity (field occupancy) and optic flow (relative motion). With visual input, zebrafish exhibited higher swimmi

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19

Lindsay, Alan E., Andrew J. Bernoff, and Adrián Navarro Hernández. "Short-time diffusive fluxes over membrane receptors yields the direction of a signalling source." Royal Society Open Science 10, no. 4 (2023). http://dx.doi.org/10.1098/rsos.221619.

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An essential ability of many cell types is to detect stimuli in the form of shallow chemical gradients. Such cues may indicate the direction that new growth should occur, or the location of a mate. Amplification of these faint signals is due to intra-cellular mechanisms, while the cue itself is generated by the noisy arrival of signalling molecules to surface bound membrane receptors. We employ a new hybrid numerical-asymptotic technique coupling matched asymptotic analysis and numerical inverse Laplace transform to rapidly and accurately solve the parabolic exterior problem describing the dyn

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