We discuss countermeasure against insider threats in network security aspect. In the context of countermeasure against insider threats, there is no perimeter for access control in a network and a traditional process b...
详细信息
3D reconstruction for freehand 3D ultrasound is a challenging issue because the recorded B-scans are not only sparse, but also non-parallel. Both conventional volume and surface reconstruction methods can39;t recons...
详细信息
The paper is concerned with the stability analysis and the ramp compensation of a permanent magnet dc drive system operated in two and four-quadrant. The stability analysis is based on the eigenvalues of the Jacobian ...
详细信息
This work deals with motion analysis of the human body, with robotic leg control and then with neuroprosthesis test bench. The issues raised in motion analysis are of interest for controlling motion-specific parameter...
详细信息
In this paper, robust preoperative planning of RAMICS is formulated. The intent of the proposed planning framework is to improve surgical outcomes by contemplating the intraoperative conditions of the surgical procedu...
详细信息
ISBN:
(纸本)9781612843858
In this paper, robust preoperative planning of RAMICS is formulated. The intent of the proposed planning framework is to improve surgical outcomes by contemplating the intraoperative conditions of the surgical procedure and the geometry of the patient's thoracic anatomy. This includes improvements in target reachability, instrument dexterity for critical surgical tasks, surgical task feasibility and visibility. Given the patient's preoperative computed tomography images of the chest, the planning framework aims to determine the optimal location of the access ports on the ribcage, along with the optimal pose of the robotic arms relative to the patient's anatomy. To minimize susceptibility of the results to intraoperative geometric uncertainty, the planning is formulated as a Generalized Semi-Infinite Program (GSIP) with a convex lower level problem and a multi-criteria objective function. By solving the GSIP, tolerable geometric uncertainty within the task space is increased by eliminating the likelihood of collisions and joint limit violation in a neighborhood of the surgical target.
The Reflexive Game Theory is based on decision-making principles similar to the ones used by humans. This theory considers groups of subjects and allows to predict which action from the set each subject in the group w...
详细信息
ISBN:
(纸本)9783642193842
The Reflexive Game Theory is based on decision-making principles similar to the ones used by humans. This theory considers groups of subjects and allows to predict which action from the set each subject in the group will choose. It is possible to influence subject's decision in a way that he will make a particular choice. The purpose of this study is to illustrate how robots can refrain humans from risky actions. To determine the risky actions, the Asimov's Three Laws of robotics are employed. By fusing the RGT's power to convince humans on the mental level with Asimov's Laws' safety, we illustrate how robots in the mixed groups of humans and robots can influence on human subjects in order to refrain humans from risky actions. We suggest that this fusion has a potential to device human-like motor behaving and looking robots with the human-like decision-making algorithms.
Biological experiments and drug screen require the transfer of individual zebrafish embryos into standard multi-well microplates. Manually pipetting embryos into wells is tedious and time consuming. This paper reports...
详细信息
ISBN:
(纸本)9781612843858
Biological experiments and drug screen require the transfer of individual zebrafish embryos into standard multi-well microplates. Manually pipetting embryos into wells is tedious and time consuming. This paper reports a prototype cooperative robotic system capable of transferring zebrafish embryos in parallel and depositing a single embryo per well in a 96-well microplate. A cell holding device was developed to trap multiple embryos in a regular pattern. The cell holding device and a microplate are positioned and aligned along multiple axes by the system. Embryo release strategies were systematically studied and compared. Experiments demonstrated that out of the 1,056 zebrafish embryos used in experiments (i.e., 44 times parallel transfer into 11 96-well plates), 996 wells were successfully filled with one and only one zebrafish embryo, representing a success rate of 94.3%. Further experiments confirmed that the transferred embryos were able to develop into zebrafish with 100% survival rate.
This paper presents the first prototype of a magnetic resonance imaging (MRI) compatible piezoelectric actuated robot integrated with a high-resolution fiber optic sensor for prostate brachytherapy with real-time in s...
详细信息
ISBN:
(纸本)9781612843858
This paper presents the first prototype of a magnetic resonance imaging (MRI) compatible piezoelectric actuated robot integrated with a high-resolution fiber optic sensor for prostate brachytherapy with real-time in situ needle steering capability in 3T MRI. The 6-degrees-of-freedom (DOF) robot consists of a modular 3-DOF needle driver with fiducial tracking frame and a 3-DOF actuated Cartesian stage. The needle driver provides needle cannula rotation and translation (2-DOF) and stylet translation (1-DOF). The driver mimics the manual physician gesture by two point grasping. To render proprioception associated with prostate interventions, a Fabry-Perot interferometer based fiber optic strain sensor is designed to provide high-resolution axial needle insertion force measurement and is robust to large range of temperature variation. The paper explains the robot mechanism, controller design, optical modeling and opto-mechanical design of the force sensor. MRI compatibility of the robot is evaluated under 3T MRI using standard prostate imaging sequences and average signal noise ratio (SNR) loss is limited to 2% during actuator motion. A dynamic needle insertion is performed and bevel tip needle steering capability is demonstrated under continuous real-time MRI guidance, both with no visually identifiable interference during robot motion. Fiber optic sensor calibration validates the theoretical modeling with satisfactory sensing range and resolution for prostate intervention.
The proceedings contain 73 papers. The topics discussed include: nonlinear effects in optical fibers: limitations and benefits;generalized approach for electronic circuits optimization;from droplets and particles to h...
ISBN:
(纸本)9789604742769
The proceedings contain 73 papers. The topics discussed include: nonlinear effects in optical fibers: limitations and benefits;generalized approach for electronic circuits optimization;from droplets and particles to hierarchical spatial organization: nanotechnological challenges for microfluidics;noble metal nanoparticles: from mass production to applications;solid-core and hollow nanostructures: synthesis, physicochemical characterizations and biological applications;implementation and application of a simple real-time OS for 8-bit microcontrollers;optimum mesh dependent diffusion coefficient proof from high to low order upwind schemes utilized in plasma discharges;implementation of SYMLET wavelets to removal of Gaussian additive noise from speech signal;final users perceived QoS on mobile convergent multimedia services;current status of nanotechnology in Mexico;and limited applicability of the constant optical power controller to the integrated intensity.
In scalable Distributed Virtual Environments (DVE), communication between the users can maintain the consistent state of system, but consume the network bandwidth at the same time. Message filtering is necessary to be...
详细信息
ISBN:
(纸本)9780769542966
In scalable Distributed Virtual Environments (DVE), communication between the users can maintain the consistent state of system, but consume the network bandwidth at the same time. Message filtering is necessary to be adopted in order to support more users in a large scale virtual environment. Existing message filtering algorithms are, in our opinion, somewhat deficient either in users' AOI management or consistency maintenance. In this paper, a knowledge-based message filtering algorithm is proposed. The knowledge base is built in order to divide effectively the user's vision domain. Users send update messages to receivers in its interaction area and in its perception area with different frequency to reduce the traffic and improve the consistency. Experimental results show that the knowledge-based message filtering algorithm can reduce the redundant traffic and save the consumption of network resources.
暂无评论