Relevant bibliographies by topics / Double-step task

Academic literature on the topic 'Double-step task'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Double-step task"

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Oostwoud Wijdenes, Leonie, Eli Brenner, and Jeroen B. J. Smeets. "Exposing sequence learning in a double-step task." Experimental Brain Research 234, no. 6 (February 12, 2016): 1701–12. http://dx.doi.org/10.1007/s00221-016-4566-z.

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Jin, Zhenlan, Shulin Yue, Junjun Zhang, and Ling Li. "Task-irrelevant emotional faces impair response adjustments in a double-step saccade task." Cognition and Emotion 32, no. 6 (October 5, 2017): 1347–54. http://dx.doi.org/10.1080/02699931.2017.1386621.

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Kapoor, Vishal, and Aditya Murthy. "Covert inhibition potentiates online control in a double-step task." Journal of Vision 8, no. 1 (January 29, 2008): 20. http://dx.doi.org/10.1167/8.1.20.

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Sharika, K. M., Arjun Ramakrishnan, and Aditya Murthy. "Control of Predictive Error Correction During a Saccadic Double-Step Task." Journal of Neurophysiology 100, no. 5 (November 2008): 2757–70. http://dx.doi.org/10.1152/jn.90238.2008.

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We explored the nature of control during error correction using a modified saccadic double-step task in which subjects cancelled the initial saccade to the first target and redirected gaze to a second target. Failure to inhibit was associated with a quick corrective saccade, suggesting that errors and corrections may be planned concurrently. However, because saccade programming constitutes a visual and a motor stage of preparation, the extent to which parallel processing occurs in anticipation of the error is not known. To estimate the time course of error correction, a triple-step condition was introduced that displaced the second target during the error. In these trials, corrective saccades directed at the location of the target prior to the third step suggest motor preparation of the corrective saccade in parallel with the error. To estimate the time course of motor preparation of the corrective saccade, further, we used an accumulator model (LATER) to fit the reaction times to the triple-step stimuli; the best-fit data revealed that the onset of correction could occur even before the start of the error. The estimated start of motor correction was also observed to be delayed as target step delay decreased, suggesting a form of interference between concurrent motor programs. Taken together we interpret these results to indicate that predictive error correction may occur concurrently while the oculomotor system is trying to inhibit an unwanted movement and suggest how inhibitory control and error correction may interact to enable goal-directed behaviors.
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Norouzi-Gheidari, Nahid, and Philippe Archambault. "Absence of equifinality of hand position in a double-step unloading task." Experimental Brain Research 205, no. 2 (July 10, 2010): 167–82. http://dx.doi.org/10.1007/s00221-010-2350-z.

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Wong, Aaron L., and Mark Shelhamer. "Using prediction errors to drive saccade adaptation: the implicit double-step task." Experimental Brain Research 222, no. 1-2 (August 1, 2012): 55–64. http://dx.doi.org/10.1007/s00221-012-3195-4.

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Thakkar, Katharine N., Jeffrey D. Schall, Gordon D. Logan, and Sohee Park. "Response inhibition and response monitoring in a saccadic double-step task in schizophrenia." Brain and Cognition 95 (April 2015): 90–98. http://dx.doi.org/10.1016/j.bandc.2015.01.007.

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Berman, Rebecca A., Laura M. Heiser, Catherine A. Dunn, Richard C. Saunders, and Carol L. Colby. "Dynamic Circuitry for Updating Spatial Representations. III. From Neurons to Behavior." Journal of Neurophysiology 98, no. 1 (July 2007): 105–21. http://dx.doi.org/10.1152/jn.00330.2007.

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Each time the eyes move, the visual system must adjust internal representations to account for the accompanying shift in the retinal image. In the lateral intraparietal cortex (LIP), neurons update the spatial representations of salient stimuli when the eyes move. In previous experiments, we found that split-brain monkeys were impaired on double-step saccade sequences that required updating across visual hemifields, as compared to within hemifield. Here we describe a subsequent experiment to characterize the relationship between behavioral performance and neural activity in LIP in the split-brain monkey. We recorded from single LIP neurons while split-brain and intact monkeys performed two conditions of the double-step saccade task: one required across-hemifield updating and the other required within-hemifield updating. We found that, despite extensive experience with the task, the split-brain monkeys were significantly more accurate for within-hemifield than for across-hemifield sequences. In parallel, we found that population activity in LIP of the split-brain monkeys was significantly stronger for the within-hemifield than for the across-hemifield condition of the double-step task. In contrast, in the normal monkey, both the average behavioral performance and population activity showed no bias toward the within-hemifield condition. Finally, we found that the difference between within-hemifield and across-hemifield performance in the split-brain monkeys was reflected at the level of single-neuron activity in LIP. These findings indicate that remapping activity in area LIP is present in the split-brain monkey for the double-step task and covaries with spatial behavior on within-hemifield compared to across-hemifield sequences.
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Bedore, Christopher D., Jasmine Livermore, Hugo Lehmann, and Liana E. Brown. "Comparing three portable, tablet-based visuomotor tasks to laboratory versions: An assessment of test validity." Journal of Concussion 2 (January 2018): 205970021879914. http://dx.doi.org/10.1177/2059700218799146.

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The assessment of visuomotor function can provide important information about neurological status. Many tasks exist for testing visuomotor function in the laboratory, but the availability of portable, easy-to-use versions that allow reliable, accurate, and precise measurement of movement timing and accuracy has been limited. We developed a tablet application that uses three laboratory visuomotor tests: the double-step task, interception task, and stop-signal task. We asked the participants to perform both the lab and tablet versions of each task and compared their response patterns across equipment types to assess the validity of the tablet versions. On the double-step task, the participants adjusted to the displaced target adequately in both the lab and tablet versions. On the interception task, the participants intercepted nonaccelerating targets and performed worse on accelerating targets in both versions of the task. On the stop-signal task, the participants successfully inhibited their reaching movements on short stop-signal delays (50–150 ms) more frequently than on long stop-signal delays (200 ms) in both versions of the task. Our findings suggest that the tablet version of each task assesses visuomotor processing in the same way as their respective laboratory version, thus providing the research community with a new tool to assess visuomotor function.
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de Brouwer, Anouk J., W. Pieter Medendorp, and Jeroen B. J. Smeets. "Contributions of gaze-centered and object-centered coding in a double-step saccade task." Journal of Vision 16, no. 14 (November 16, 2016): 12. http://dx.doi.org/10.1167/16.14.12.

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Dissertations / Theses on the topic "Double-step task"

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Shi, Kun. "Nonlinear acoustic echo cancellation." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26704.

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Thesis (Ph.D)--Electrical and Computer Engineering, Georgia Institute of Technology, 2009.
Committee Chair: G. Tong Zhou; Committee Co-Chair: Xiaoli Ma; Committee Member: David V. Anderson; Committee Member: James Stevenson Kenney; Committee Member: Liang Peng; Committee Member: William D. Hunt. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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O'Rielly, Jessica Lee. "The online control of visually guided movement across the lifespan." Thesis, 2019. http://hdl.handle.net/2440/124165.

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The online control of movement is essential to the flexible control of eye-hand coordinated action. As people age, there is evidence to suggest that various aspects of both motor and visual performance decline. While some aspects of eye-hand coordination have been extensively studied in an ageing population, the online control of goal directed movement has received less attention. The aim of this thesis is to understand how healthy ageing impacts the online control of visually guided movement. The manuscripts in this thesis used a target perturbation paradigm and manipulated the time at which a target perturbation occurred to investigate how healthy ageing impacts visually guided motor control. Early, mid and later times during the reach were selected to determine how each group was able to use the available time to correct their reach. Eye movement, hand movement or a combination of such was recorded and performance was considered across age groups and target perturbation times. Overall, the results demonstrate that while both younger and older participants were able to compensate for target perturbations that occurred earlier in the movement, the difficulties in compensating for target perturbations that occurred later in the reach were exacerbated in older participants. Manuscript 1 demonstrated that older participants had significantly increased movement times and longer saccade latencies compared to younger participants. Manuscript 2 showed that older participants were slower overall and produced a correction to a change in target location proportionally less often than younger participant, with effects exacerbated in the later perturbation time condition. Manuscript 3 furthered the results of Manuscripts 1 and 2 and demonstrated that that older participants were both slower to initiate a correction in response to a target perturbation and did so less frequently. Older participants also had slower saccade latencies to targets pre and post target perturbation with a correlation across both groups between the eye and the hand position at the time of movement completion. These results suggest that the age-related effects on performance may be due in part to a delay in the acquisition of visual information to inform the reaching movement, stemming from the increase in saccade latencies pre and post target perturbation for older participants. Taken together, the results of this thesis demonstrate that hand-eye coordination during online control is impacted by healthy ageing.
Thesis (Combined PhD & MPsych (OrgHumFactors)) – University of Adelaide, School of Psychology, 2020
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Book chapters on the topic "Double-step task"

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Othman, Sarah Ben, Hayfa Zgaya, Michèle Vasseur, Bertrand Décaudin, Pascal Odou, and Slim Hammadi. "Introducing Augmented Reality Technique to Enhance the Preparation Circuit of Injectable Chemotherapy Drugs." In MEDINFO 2021: One World, One Health – Global Partnership for Digital Innovation. IOS Press, 2022. http://dx.doi.org/10.3233/shti220121.

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Chemotherapy preparations are often complex and subject to a strict regulatory context. The existing control methods are often limited to Double Visual Control (DVC). In this paper, the preparation circuit of chemotherapy drugs is evaluated through data collection and statistical analysis in order to highlight the difficulties encountered. The results regarding preparation and control times and the number of task interruptions highlight the unreliability of the DVC and its impact on processing time. As a solution, we propose a decision support system “Smart Prep” based on Augmented Reality (AR), co-developed, and commercialized by the Faculty of Pharmacy of Lille, Ecole Centrale de Lille and the company Computer Engineering. This system allows the preparation of chemotherapy drugs according to a step-by-step mode, a traceability of the preparation steps and a reduction of tasks’ interruptions.
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Tejasri, P. N. S., K. Anusha, K. Sangeet Kumar, Nukella Venkatesh, and Y. Yamini Devi. "Interference-Normalized Least Mean Square Algorithm: A Comparative Study." In Advances in Transdisciplinary Engineering. IOS Press, 2023. http://dx.doi.org/10.3233/atde221241.

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A general least mean square interference technique is provided for effective adaptive filtering. The gradient adaptive learning rate methodology can now handle non-stationary data with the Interference normalised least mean square technique. Because of issues like duplicate talk and echo route variance, echo cancellation is made more difficult because the learning rate must be adjusted. Frequency domain echo cancelers learn at different rates, which can be altered in a novel fashion. Normalized least mean square method normalised learning rate under noise is used to calculate an optimal learning rate. This double-talk detection technique exceeds the competition while also being incredibly simple to implement. A number of least mean square (LMS)-type algorithms have been investigated in place of their recursive equivalents of IVM or TLS/DLS, which involve large calculations. As a result of these findings, we provide a consistent LMS type technique for the data least squares estimate problem. This unique approach normalizes step size and estimates the variance of the noise in a heuristic manner using the geometry of the mean squared error function, resulting in rapid convergence and robustness against environmental noise.
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Manzo, V. J. "Generating Music." In Max/MSP/Jitter for Music. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780199777679.003.0007.

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In this chapter, we will create a program that randomly generates pitches at a specified tempo. The program will have the ability to change a number of musical variables including timbre, velocity, and tempo. We will also write a program that allows your MIDI keyboard to function as a synthesizer. These two programs will be the basis of future projects related to composition and performance. Since you’ve already learned a number of objects in the previous chapter, let’s agree that when you’re asked to create an object that you already know, like button, for example, it will be sufficient for me to say “create a button” instead of repeating the process of creating a new object box and typing in the word button. Combining steps in this way will help us to get through the instructions with greater speed while reinforcing your understanding of how certain objects work. In this way, the instruction “create a message box containing the numbers 41 and 38” actually combines several smaller, and hopefully intuitive, instructions into a single step. I will slowly stop mentioning key commands and other shortcuts for objects and tasks that I’ve already introduced. Create a new patch and 1. Create a new object (press n) called random The random object takes a number as its only argument and randomly generates a number between 0 and one less than the argument when it receives a bang in its inlet. 2. Give this random object the argument 128 (Note: if you already clicked away from the object, double click it in order to, once again, enable typing within the object box) Be sure to put a space between the word random and the argument 128 or else Max will look for an object called random128 that does not exist. 3. Create a new button (press b) 4. Connect the outlet of button to the first inlet of random 128 5. Create a number box (press i) 6. Connect the outlet of random 128 to the inlet of the number box
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Conference papers on the topic "Double-step task"

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Peng, William Z., Hyunjong Song, and Joo H. Kim. "Stability Region-Based Analysis of Walking and Push Recovery Control." In ASME 2020 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/detc2020-22720.

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Abstract Push recovery is a vital aspect of balance stability control in biped robots. In this work, the response of a biped system to unexpected external perturbations is analyzed for different tasks and controllers using stability criteria based on balanced and steppable regions. The steppable region for a given step length and the balanced regions for single and double support contacts are constructed for a biped robot using optimization with its system dynamics, kinematic limits, actuation limits, and contact interactions with the environment. The regions are compared with those of a human subject to demonstrate that human gait exhibits unbalanced (but steppable) phases largely absent in robotic gait. These regions are also applied to a comparative analysis against capturability, where the computed steppable region is significantly larger than the capture region of an equivalent reduced-order model. The stability regions are also used to compare the performance of controllers during a double support balancing task. The implemented hip, knee, and ankle strategy-based controller led to improved stabilization — i.e., decreased foot tipping and time required to balance — relative to an existing hip and ankle controller and a gyro feedback controller. The proposed approaches are applicable to the analysis of any bipedal task and stability controller in general.
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Chung, Hyun-Joon, Yujiang Xiang, Rajan Bhatt, Jasbir S. Arora, and Karim Abdel-Malek. "Predictive Simulation of Human Walk-to-Run Transition." In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-70171.

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A general optimization formulation for walk-to-run transition prediction using 3D skeletal model is presented. The walk-to-run transition is used to connect fast walking to slow running by using a step-to-step transition formulation. Walk-to-run transition includes four phases: double support walking phase, single support swinging phase, running phase, and finally single support running phase. The transition task is formulated as an optimization problem in which the dynamic effort is minimized subject to basic physical constraints. The joint torques and ground reaction forces (GRF) are recovered and analyzed from the simulation. The optimal solution of transition simulation is obtained in a few minutes by using predictive dynamics method.
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Salerno, Silvana. "Gender and Ergonomics: The Recognition of Women’s Occupational Diseases." In Applied Human Factors and Ergonomics Conference. AHFE International, 2022. http://dx.doi.org/10.54941/ahfe1001344.

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Scientific international papers have been selected to show the underrepresentation of women’s occupational diseases in many countries. Women musculoskeletal disorders are included although represent the first claims of working women not only in Europe. Lack of ergonomics in gender work concept is the cause of women occupational illnesses but more ergonomics should also play a role in ameliorating the gender gap recognition. Job title and summary description of work activities are not fair in representing women’s exposure. Dual task (or double actions) and multitasking are examples of poorly studied women’s work activities. Only some specific studies in the health care sector show multitasking work demand towards higher performance among nurses. The increase in fatigue towards occupational diseases, due also to this exposure, represent another ergonomics challenge. Ergonomic observation of women work can help to identify inequities in each step of the process to overcome gender bias, occupational health diseases included.
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Feliu, Vicente, Blas M. Vinagre, and Concepcio´n A. Monje. "Fractional Control of a Single-Link Flexible Manipulator." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84819.

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A new method to control single-link lightweight flexible manipulators in the presence of changes in the load is proposed in this paper. The overall control scheme consists of three nested control loops. Once the friction and other nonlinear effects have been compensated, the inner loop is designed to give a fast motor response. The middle loop decouples the dynamics of the system, and reduces its transfer function to a double integrator. A fractional-derivative controller is used to shape the outer loop into the form of a fractional-order integrator. The result is a constant-phase system with, in the time domain, step responses exhibiting constant overshoot, independently of variations in the load. Continuous and discrete approximate implementations of the fractional controller are simulated. Comparison of the responses to a step command of the manipulator controlled with the proposed approximations and with the ideal fractional controller showed that the latter could be accurately approximated by standard continuous and discrete controllers of high order preserving the robustness. An interesting feature of this control scheme is that the overshoot is independent of the tip mass. This allows a constant safety zone to be delimited for any given placement task of the arm, independently of the load being carried, thereby making it easier to plan collision avoidance. Simulations also include comparison with standard PD controller, and verification of the assumption of dominant low-frequency vibration mode.
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Oka, Ryuichi, Kensaku Fujii, and Mitsuji Muneyasu. "A step size control method steadily reducing acoustic echo even during double-talk." In 2008 International Symposium on Intelligent Signal Processing and Communications Systems (ISPACS 2008). IEEE, 2009. http://dx.doi.org/10.1109/ispacs.2009.4806654.

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Dimitriou, P., C. Avola, R. Burke, C. Copeland, and N. Turner. "A Comparison of 1D-3D Co-Simulation and Transient 3D Simulation for EGR Distribution Studies." In ASME 2016 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icef2016-9361.

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Computational modeling, an important task for design, research and development stages, is evolving fast with the increase of computational capabilities over the last decades. One-dimensional (1D) CFD simulation is commonly used to analyze the flow rates and pressures of an entire fluid system of interconnected parts such as pipes, junctions, valves, and pumps. In contrast, three-dimensional (3D) CFD simulation allows detailed modeling of components such as manifolds, heat exchangers, and combustion cylinders where the flow contains significant 3D effects. Coupling a 1D model with a 3D domain potentially offers the benefits of both simulation strategies in one co-simulation approach. The present study provides a deep understanding of the co-simulation approach by listing all necessary steps need to be followed before and during the coupling of the 1D and 3D simulation software. It analyses the simulation and convergence time requirements based on the 3D model mesh quality and compares this approach with the current 1D–3D uncoupled approach followed in the industry. The outputs of both simulation approaches are then compared with experimental results. The co-simulation time mainly depends on the mesh quality of the 3D domain and the number of inner iterations per time-step which is entirely determined by the nature and complexity of the simulation. The co-simulation time per engine cycle is almost identical to the uncoupled approach. However, it was found that the number of cycles required for convergence in the coupled approach is nearly double than the uncoupled approach. The comparison between the two simulation approaches and the experimental results demonstrated the very 3D nature of the flows, the sensitivity of the uncoupled approach to input conditions and the sensitivity of co-simulation to the averaged boundary conditions transferred from the 1D model back to the 3D domain.
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Sahoo, Shubhashisa, Shankar C. Subramanian, and Suresh Srivastava. "Sensitivity Analysis of Vehicle Parameters for Heading Angle Control of an Unmanned Ground Vehicle." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-39685.

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Even if there are many software and mathematical models available in the literature to analyze the dynamic performance of Unmanned Ground Vehicles (UGVs), it is always difficult to identify or collect the required vehicle parameters from the vehicle manufacturer for simulation. In analyzing the vehicle handling performance, a difficult and complex task is to use an appropriate tire model that can accurately characterize the ground-wheel interaction. Though, the well-known ‘Magic Formula’ is widely used for this purpose, it requires expensive test equipment to estimate the Magic Formula coefficients. The design of longitudinal and lateral controllers plays a significant role in path tracking of an UGV. Though the speed of the vehicle may remain almost constant in most of the maneuvers such as lane change, Double Lane Change (DLC), step steer, cornering, etc., design of the lateral controller is always a challenging task as it depends on the vehicle parameters, road information and also on the steering actuator dynamics. Although a mathematical model is an abstraction of the actual system, the controller is designed based on this model and then deployed on the real system. In this paper, a realistic mathematical model of the vehicle considering the steering actuator dynamics has been developed by calculating the cornering stiffnesses from the basic tire information and the vertical load on each tire. A heading angle controller of the UGV has been considered using the Point-to-Point navigation algorithm. Then, these controllers have been implemented on a test platform equipped with an Inertial Measurement Unit (IMU) and a Global Positioning System (GPS). A wide range of experiments such as J-Turn, lane change and DLC have also been conducted for comparison with the simulation results. Sensitivity analysis has been carried out to check the robustness and stability of the controller by varying the cornering stiffness of tires, the most uncertain parameter. The longitudinal speed of the vehicle is assumed to vary between a minimum value of 1.4 m/s and a maximum value of 20 m/s. It has been found that when the vehicle is moving at a constant velocity of 3.2 m/s, a heading angle change of 20 degrees can be achieved within 3 seconds with 2% steady state error using a proportional controller. It was observed that at lower speeds, the controller is more sensitive to the steering actuator dynamics and at higher speeds, the controller is more sensitive to the cornering stiffness of tires.
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Gowing, S., and Y. Shen. "Ventilation effects on Cavitating Wedges and Struts." In SNAME 28th American Towing Tank Conference. SNAME, 2007. http://dx.doi.org/10.5957/attc-2007-005.

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Reduction of ship hull skin friction can represent significant drag reduction for high-speed ships, especially those designed for low wave drag or using catamaran-type hull designs. A method is proposed to reduce this friction by shielding the side portions of the hull from the water using ventilated cavities created with protruding wedges. These wedges create low-pressure regions in their wake that naturally ingest air at the surface, reducing the drag of the wedge while lengthening their trailing cavities. The proposed scheme takes advantage of the natural combination of high speeds and low pressures that exist at the waterline of a high-speed ship without requiring auxiliary pumps or machinery. As a first step for engineering estimates of drag reduction, preliminary experiments are presented that use two-dimensional wedges and similarly shaped struts to validate theoretical ventilated-cavity predictions. Tests are conducted on parabolic and wedge-shaped sections and struts in a closed-jet water tunnel at 20 and 30 knots, using a pipe to ventilate behind the strut using natural suction. The wedge drag and back pressure and resulting cavity lengths are measured over a range of ventilation flows. The two-dimensional wedge drag shows fair agreement with linearized theory predictions at low cavitation numbers, and this drag can be reduced over 50% from its fully wetted value using natural ventilation. The change in drag is attributed mostly to the change in the pressure on the back of the wedge caused by the ventilation. The measured ventilated cavity lengths are close to linear theory models using a double spiral vortex for cavity closure conditions. For the range of ventilated conditions tested, the air flow rates required for ventilation are only a few percent of the equivalent flow rate swept out by the passage of the strut through the water. These flowrates could become much greater at lower pressures representative of shallower depths.
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Wang, Yun, and Xiaoguang Yang. "Transients of Polymer Electrolyte Fuel Cell and Hydrogen Tank." In ASME 2009 3rd International Conference on Energy Sustainability collocated with the Heat Transfer and InterPACK09 Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/es2009-90242.

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This paper seeks to develop 3D dynamic models for polymer electrolyte fuel cells (PEFCs) and hydrogen tanks, respectively. The dynamic model of PEFCs consists of multiple layers of a single PEFC and couples the various dynamic mechanisms in fuel cells, such as electrochemical double-layer discharging/charging, species transport, heat transfer, and membrane water uptake. The one of hydrogen tanks includes a 3D description of the hydride kinetics coupled with mass/heat transport in the hydrogen tank. Transient of fuel cell during step change in current is simulated. Dynamic responses of the cell voltage and heat generation rate are discussed. Hydrogen absorption process in the tank is considered. Temperature, reaction rate and heat rejection in the fuel tank are presented. Efforts are also made to discuss the coupling of these two systems in practice and associated issues.
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Kanadi, Marko, Muhammad Tahir Akhtar, and Wataru Mitsuhashi. "A variable step-size-based ICA method for a fast and robust acoustic echo cancellation system without requiring double-talk detector." In 2013 IEEE China Summit and International Conference on Signal and Information Processing (ChinaSIP). IEEE, 2013. http://dx.doi.org/10.1109/chinasip.2013.6625310.

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