the models of software implementation of the system of cryptographic protection of information (SCPI) withthe given characteristics are described. this system is intended for using in systems and networks of informat...
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ISBN:
(纸本)9781941763001
the models of software implementation of the system of cryptographic protection of information (SCPI) withthe given characteristics are described. this system is intended for using in systems and networks of information transmission and storage. In the created system of cryptographic protection of information, the nonconventional algorithms of encryption and digital signature developed on the basis of nonpositional polynominal notations (NPNs) are implemented. Synonyms of NPNs are notations in residual classes. Given characteristics are the length of the message or the digital signature, as well as cryptostrength of algorithms.
Bat wings contain dozens of joints that enable the animal to perform aggressive maneuvers by means of changing the wing shape during flight. there is evidence that the inertial forces produced by their wings during fl...
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ISBN:
(纸本)9789897580406
Bat wings contain dozens of joints that enable the animal to perform aggressive maneuvers by means of changing the wing shape during flight. there is evidence that the inertial forces produced by their wings during flapping have a key role in the attitude movements of the animal, i.e. aerial rotations. In fact, bats efficiently generate net body forces to manoeuvre by taking advantage of their large wing-to-body mass ratio. In this paper, the following question is formulated: Could a Micro Aerial Vehicle (MAV) inspired by the biomechanics of bats take advantage of the morphing-wings aimed at increasing net body forces? Using BaTboT, a novel bat-like MAV with highly articulated wings actuated by shape memory alloy actuators, our goal is to quantify the effects of different wing modulation patterns on the generation of net body forces. Experiments are carried out to confirm the important physical role that changing the wing shape enables: the contraction time of the wings (upstroke) should be faster than the extension time (downstroke), taking about 37.5% of the wingbeat period. this modulation pattern has enabled a lift force increment of 22% (from L = 0.92N to L = 1.12N), abrupt drag reduction (from D = 0.22N to D = 0.11N) and also an increase of net body forces (Fnet) about 28% compared to those wing modulation patterns defined with equal periods for contraction/extension. these findings can be useful for accurate dynamics modelling and efficient design of flight controllers applied to morphing-wing micro aerial vehicles.
We propose a traffic prediction algorithm that reduces the packets delay in Ethernet Passive Optical Networks (EPONs). the algorithm relies on Multi-Point control Protocol (MPCP) message and traffic monitoring at the ...
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ISBN:
(纸本)9789897580444
We propose a traffic prediction algorithm that reduces the packets delay in Ethernet Passive Optical Networks (EPONs). the algorithm relies on Multi-Point control Protocol (MPCP) message and traffic monitoring at the Optical Network Units (ONUs) and utilizes the monitoring information to predict the accumulated burst size using higher order least-mean-square polynomial approximations. the simulation of the algorithm shows that it achieves a delay improvement of over 30% without any further modification in the communication and bandwidth assignment procedure of the EPON.
Among the many features of muscles, their softness, (the ability to deform to accommodate uncertainty in the environment), and their ability to continue functioning despite disturbances, even partial damage, are quali...
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ISBN:
(纸本)9781479931262
Among the many features of muscles, their softness, (the ability to deform to accommodate uncertainty in the environment), and their ability to continue functioning despite disturbances, even partial damage, are qualities one would desire to see in robotic actuators. these properties are intimately related to the manner in which muscles work since they arise from the progressive recruitment of many motor units. this differs greatly from current robotic actuator technologies. We present an actuation platform prototype that can support experimental validation of algorithms for muscle fiber recruitment-inspired control, and where further ways to exploit discretization and redundancy in muscle-like control can be discovered. this platform, like muscles, is composed of discretely activated motor units with an integrated compliant coupling. the modular, cellular structure endows the actuator with good resilience in response to damage. It can also be repaired or modified to accommodate changing requirements in situ rather than replaced. Several performance metrics particular to muscle-like actuators are introduced and calculated for one of these units. the prototype has a blocked force of 2.51 N, a strain rate of 21.1 %, and has an input density of 5.46 x 10(3) motor units per square meter. It consumes 18 W of electrical power during a full isometric contraction. the actuator unit is 41.0 mm(3) in size. the force during isometric contractions as it varies with activation is evaluated experimentally for two configurations of modules.
In this paper, we investigate the feasibility of employing robotics, high-density electroencephalography (EEG), and surface electromyography (EMG) for ankle rehabilitation in a subject with multiple sclerosis (MS). A ...
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ISBN:
(纸本)9781479931262
In this paper, we investigate the feasibility of employing robotics, high-density electroencephalography (EEG), and surface electromyography (EMG) for ankle rehabilitation in a subject with multiple sclerosis (MS). A single session of seated, interactive ankle robot ("Anklebot") training with concurrent 60-channel EEG and 2-channel EMG monitoring was conducted. the task entailed pointing withthe ankle while playing a video game that synchronized ankle movements to guide a screen cursor through 560 moving gates. Practice-induced improvements in multiple motor control measures were accompanied by changes in EEG measures of activation and networking, and in EMG measures indicating greater muscle activity. Our results suggest that Anklebot training and concurrent EEG-EMG monitoring is a feasible approach that may be deployed clinically to advance understanding of the neurophysiological mechanisms in motor-learning based recovery in persons with ankle motor deficits secondary to MS and other neurologic injuries.
this paper introduces a system for chaotic traffic control;the proposed system is a simple, sophisticated and robust version of the Intelligent Traffic Light Flow control System Using Wireless Sensors Networks propose...
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In this paper, a tool is described for visualising the Coupling Between Objects (CBO) metric for Java systems, decomposing it into coupling collaborators and using colour to denote the object-oriented mechanisms at wo...
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ISBN:
(纸本)9789897580055
In this paper, a tool is described for visualising the Coupling Between Objects (CBO) metric for Java systems, decomposing it into coupling collaborators and using colour to denote the object-oriented mechanisms at work for each couple. the resulting visualisation is also envisaged to be useful for general program comprehension and is integrated into Java development in the Eclipse IDE. Evidence is also given that the visualisation may help detect classes tending to be less fault-prone than would be expected from inspection of their CBO values alone.
the proceedings contain 186 papers. the topics discussed include: on-body inertial and magnetic sensing for assessment of hand and finger kinematics;using Kinect for upperlimb functional evaluation in home rehabilitat...
ISBN:
(纸本)9781479931262
the proceedings contain 186 papers. the topics discussed include: on-body inertial and magnetic sensing for assessment of hand and finger kinematics;using Kinect for upperlimb functional evaluation in home rehabilitation: a comparison with a 3D stereoscopic passive marker system;knowledge discovery, rehabilitation robotics, and serious games: examining training data;high-accuracy recognition of muscle activation patterns using a hierarchical classifier;use of surface electromyography for human amplification using an exoskeleton driven by artificial pneumatic muscles;position and velocity cursor mappings contribute to distinct muscle forces in simulated isometric and movement reaching;experimental assessment of a coincident timing motor task of the arm under a passive mechanical perturbation;and a novel muscle synergy extraction method to explain the equilibrium-point trajectory and endpoint stiffness during human upperlimb movements on a horizontal plane.
this paper presents an approach to motion analysis for robotics in which a quantitative definition of "style of motion" is used to classify movements. In particular, we present a method for generating a &quo...
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ISBN:
(纸本)9781479949304
this paper presents an approach to motion analysis for robotics in which a quantitative definition of "style of motion" is used to classify movements. In particular, we present a method for generating a "best match" signal for empirical data via a two stage optimal control formulation. the first stage consists of the generation of trajectories that mimic empirical data. In the second stage, an inverse problem is solved in order to obtain the "stylistic parameters" that best recreate the empirical data. this method is amenable to human motion analysis in that it not only produces a matching trajectory but, in doing so, classifies its quality. this classification allows for the production of additional trajectories, between any two endpoints, in the same style as the empirical reference data. the method not only enables robotic mimicry of human style but can also provide insights into genres of stylized movement, equipping cyber-physical systems with a deeper interpretation of human movement.
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