functional neuroimaging plays a key role in addressing open questions in systems and motor neuroscience directly applicable to brain machine interfaces. Building on our low-cost motion capture technology (fMOVE), we d...
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ISBN:
(纸本)9781467363891
functional neuroimaging plays a key role in addressing open questions in systems and motor neuroscience directly applicable to brain machine interfaces. Building on our low-cost motion capture technology (fMOVE), we developed f2MOVE, an fMRI-compatible system for 6DOF goal-directed hand and wrist movements of human subjects enabling closed-loop sensorimotor haptic experiments with simultaneous neuroimaging. f2MOVE uses a high-zoom lens high frame rate camera and a motion tracking algorithm that tracks in real-time the position of special markers attached to a hand-held object in a novel customized haptic interface. the system operates with high update rate (120 Hz) and sufficiently low time delays (< 20 ms) to enable visual feedback while complex, goal-oriented movements are recorded. We present here boththe accuracy of our motion tracking against a reference signal and the efficacy of the system to evoke motor control specific brain activations in healthy subjects. Our technology and approach thus support the real-time, closed-loop study of the neural foundations of complex haptic motor tasks using neuroimaging.
Compressive sensing (CS) based cooperative transmissions is investigated in cognitive radio networks (CRN). Energy efficiency based optimal relay selection is implemented to determine the measurement numbers in CS. Ho...
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ISBN:
(纸本)9781467376877
Compressive sensing (CS) based cooperative transmissions is investigated in cognitive radio networks (CRN). Energy efficiency based optimal relay selection is implemented to determine the measurement numbers in CS. Homotopy reconstruction method that solves a bound constrained quadratic programming (BCQP) problem is studied for signal sparse reconstruction at secondary user destination (SUD) in CRN. Based on the determined measurement numbers, binary phase shift keying (BPSK) modulation signal is sparsely sampled by analog-to-information converters (AICs) equipped at the selected secondary user relays (SURs). the corresponding measurement matrix is constructed in CS-based cooperative transmissions. Homotopy reconstruction method is implemented to obtain dynamic update of the solution for BCQP problem. the updating critical value of homotopy parameter and the updating solution of the reconstructed signals' autocorrelation vector can be both achieved via iteration. Simulation results are presented to validate the effectiveness of the proposed approach. It is shown that, homotopy method recovers original signal approximately in low signal-to-noise ratio (SNR) region. Compared with orthogonal matching pursuit (OMP) reconstruction approach, it provides a balanced solution considering normalized mean square error (NMSE) performance versus computational complexity. More-over, spectrum sensing overhead plays significant role in CS based cooperative transmissions.
the author engaged in the research work of utilizing Shihmen Reservoir silt to make ceramic glazes. It was shown to be specific and feasible. But due to the different accumulation of layers or batches, it has more ins...
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ISBN:
(纸本)9783319209074;9783319209067
the author engaged in the research work of utilizing Shihmen Reservoir silt to make ceramic glazes. It was shown to be specific and feasible. But due to the different accumulation of layers or batches, it has more instability. the author had ever been three times to collect silt in different sedimentation pond, and was confirmed its chemical composition to be have obvious differences by instrumental analysis. If you used a direct replacement, you could find significant differences in appearance when silt content above 20 %. the "seger's formula" of ceramic glaze was used as the theoretical basis for the composition, and then calculated by Excel's Solver tool. It was always made the similar effect with original if you gave proper constraints and the substitution principle.
Feedback is important for cultivating creativity. Constructive feedback on design is crucial for helping design students and amateur designers iterate towards better solutions. However most of the current platforms do...
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Eye movements made when reading text are considered to be important clues for estimating both understanding and interest. To analyze gaze data captured by the eye tracker with respect to a text, we need a noise-robust...
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ISBN:
(纸本)9783319198576;9783319198569
Eye movements made when reading text are considered to be important clues for estimating both understanding and interest. To analyze gaze data captured by the eye tracker with respect to a text, we need a noise-robust mapping between a fixation point and a word in the text. In this paper, we propose a dynamic-programming-based method for effective fixation-to-word mappings that can reduce the vertical displacement in gaze location. the golden dataset is created using FixFix, our web-based manual annotation tool. We first divide the gaze data into a number of sequential reading segments, then attempt to find the best segment-to-line alignment. To determine the best alignment, we select candidates for each segment, and calculate the cost based on the length characteristics of boththe segment and document lines. We compare our method withthe naive mapping method, and show that it is capable of producing more accurate fixation-to-word mappings.
To make use of collective intelligence of many autonomous self-interested agents, it is important to form a team that all the agents agree. Two-sided matching is one of the basic approaches to form a team that consist...
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ISBN:
(纸本)9783319240695;9783319240688
To make use of collective intelligence of many autonomous self-interested agents, it is important to form a team that all the agents agree. Two-sided matching is one of the basic approaches to form a team that consists of agents from two disjoint agent groups. Traditional two-sided matching assumes that an agent has totally ordered preference list of agents to be paired with. However, it is unrealistic to have a totally ordered list for a large-scale two-sided matching problem. therefore, two-sided matching with indifferences is proposed. It allows indifferences in the preference list of agents. Two-sided matching with indifferences has two important characters weakly stable and Pareto efficiency. In this paper, we propose a new integer programming based algorithm "nucleolus" for two-sided matching with indifferences. this algorithm propose the matching which satisfies weakly stable and Pareto efficiency.
Web sites are most effective when they meet boththe contents and usability needs of their users. Due to tremendous growth of web application, it increases the complexity of web applications and web navigation. Websit...
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ISBN:
(纸本)9781509000760
Web sites are most effective when they meet boththe contents and usability needs of their users. Due to tremendous growth of web application, it increases the complexity of web applications and web navigation. Website design is easy task but, to navigate user efficiently is big challenge, one of the reason is user behavior is keep changing and web developer or designer not think according to user's behavior. Designing well-structured websites to facilitate effective user navigation patterns has long been a challenge in web usage mining with various applications like navigation prediction and improvement of website management. Different methods have been proposed to reorganize WebPages to improve users navigation using users navigation data but it still causes disorienting users and increases user's cognitive load. there is a need to improve the efficiency and the performance of a website for effective user navigation. through this Paper we will propose Mathematical programming model to improve user navigation while minimizing alteration to current structure. Optimal solution can be very quickly obtained. We are minimizing unnecessary changes to the present structure of a Web site and hence can be applied for Web site maintenance on a regular basis.
We present a framework for conceptual blending – a concept invention method that is advocated in cognitive science as a fundamental, and uniquely human engine for creative thinking. Herein, we employ the search capab...
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Current and future parallel programming models need to be portable and efficient when moving to heterogeneous multi-core systems. OmpSs is a task-based programming model with dependency tracking and dynamic scheduling...
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ISBN:
(纸本)9781450335591
Current and future parallel programming models need to be portable and efficient when moving to heterogeneous multi-core systems. OmpSs is a task-based programming model with dependency tracking and dynamic scheduling. this paper describes the OmpSs approach on scheduling dependent tasks onto the asymmetric cores of a heterogeneous system. the proposed scheduling policy improves performance by prioritizing the newly-created tasks at runtime, detecting the longest path of the dynamic task dependency graph, and assigning critical tasks to fast cores. While previous works use profiling information and are static, this dynamic scheduling approach uses information that is discoverable at runtime which makes it implementable and functional without the need of an oracle or profiling. the evaluation results show that our proposal outperforms a dynamic implementation of Heterogeneous Earliest Finish Time by up to 1.15x, and the default breadth-first OmpSs scheduler by up to 1.3x in an 8-core heterogeneous platform and up to 2.7x in a simulated 128-core chip.
this paper contains the findings about our ongoing research to make safe type system in C++ to avoid unwanted implicit casts. Our related research revealed vulnerabilities in current mainstream programming languages, ...
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