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High quality factor resonances play a significant role in sensor technology. We excite shape trapped-mode resonances in polarization conversion metasurfaces (PCMs) by introducing resonance cavities gaped by two split elliptical ring resonators (SERRs). The quality factor of the resonances can achieve 370.75, and the resonances are angle-independent and polarization independent. Moreover, the resonance...
In this paper results of dynamic tests performed on a bell tower located in Ficarolo (Italy) are reported. After the Emilia earthquake that occurred in 2012, the bell tower reported a serious damage pattern and, as a consequence, retrofitting interventions were carried out. Dynamic tests before and after the strengthening were performed to investigate the modal properties of the bell tower and to...
MRI compatibility, which often is a requirement for the new medical soft robot projects, greatly reduces available actuation methods and sensors. An example of such project is STIFF-FLOP, which aims to develop a soft silicone manipulator actuated by pressure. The current arm construction and method of actuation cause several undesirable effects, which pose problems for actuation and sensing. In this...
Computing grasps for an object is challenging when the object geometry is not known precisely. In this paper, we explore the use of Gaussian process implicit surfaces (GPISs) to represent shape uncertainty from RGBD point cloud observations of objects. We study the use of GPIS representations to select grasps on previously unknown objects, measuring grasp quality by the probability of force closure...
In this paper, we present an object-centric, fixed-dimensional 3D shape representation for robust matching of partially observed object shapes, which is an important component for object categorization from 3D data. A main problem when working with RGB-D data from stereo, Kinect, or laser sensors is that the 3D information is typically quite noisy. For that reason, we accumulate shape information...
Ultrasonic guided wave (GW) techniques have been used widely for structural health monitoring applications in various engineering structures such as rods, tubes, pipes and plates [1]. Magneto-strictive sensors/transducers [2] provide an attractive alternative to piezoelectric transducers for generating and detecting GWs because there are some advantages such as cost-effectiveness, flexibility, durability,...
Needle insertions are common during surgical procedures. Accurately delivering the needle at a specific location in the human body is of importance for the clinical outcome of the procedure. Studies have already shown that robotically inserting traditional needles with a bevel tip can improve targeting accuracy. However, steering of such needles requires spinning the needle, which may lead to additional...
We present a maneuverable antenna array that adapts to the interfering environment of the wireless base station. It delivers best estimates of the directions of the system users, an information of the utmost importance to the so-called smart base stations. Closed-form expressions are provided that determine the shape of the optimum antenna array. In the worst case scenario, when the system user may...
Fast and accurate detection of action potentials from neurophysiological data is key to the study of information processing in the nervous system. Previous work has shown that finite rate of innovation (FRI) theory can be used to successfully reconstruct spike trains from noisy calcium imaging data. This is due to the fact that calcium imaging data can be modeled as streams of decaying exponentials...
This paper investigates effect of substrate thickness on energy drift from anchor of mechanical resonators. A finite element (FE) method is utilized to capture energy loss from the anchor. To eliminate wave reflection from the outer boundaries of the resonator substrate model, a perfectly matched layer is used. This artificial layer absorbs waves before they reach to the outer boundaries of truncated...
Exhibition content has been used a touch panel for the user's convenience. Touch panel are not good recognition. And errors may occur when you use a long time. In addition there occurs a malfunction due to contamination. In the present study, such problems want to improve. We designed the Exhibition contents to recognize the swipe gesture of Kinect. Gesture recognition is constructed in three steps...
Recently, developing an autonomous navigating vehicle becomes more attention. It is equipped by multiple sensors, such as radar, laser, GPS, and camera. Among these sensors, utilization vision technique is the most adopted method for constructing such a system. It is because the camera provides a lot of information and is low-cost device rather than other sensors. Traffic signs, as one of the most...
In dense mobile wireless sensor networks, it is desirable to reduce traffic for data gathering as much as possible while satisfying an application requirement. In this paper, focusing on an application which monitors the time-variant shape of events, we discuss an approach to achieve an efficient monitoring with small traffic in dense mobile wireless sensor networks.
In this paper the authors consider the software implementation of three-dimensional visualization of the underwater environment using height maps via Windows Presentation Foundation. In addition, the problems of constructing a realistic 3D model of the surface topography have been described. In order to construct 3D model of the surface topography the authors have proposed the use of height maps and...
Applications in smart environments can make use of a user positioning service for various purposes such as activity recognition, context awareness and indoor navigation. We propose a novel solution to the user positioning problem based on inplane detection, which employs infrared light emitters and sensors placed horizontally on fixed positions along the circumference. The presented solution outputs...
Non-destructive techniques represent a very relevant tool in many engineering fields and play a relevant role in the case of preservation of cultural heritage and historical structures. This is particularly true in those countries exposed to seismic risk and other relevant natural hazards. Health conditions of masonry constructions often depend on the interaction between curved structures, such as...
This paper reports on a feasibility study of contactless hand biometrics using an RGB-Depth (RGB-D) camera such as the Kinect v2 prototype. The RGB, depth, and near-infrared (near-IR) spectra provide access to information such as palm print, hand shape, finger joint location, and vein patterns. Extraction of the hand is first done using depth data. The frames with the best palm position are selected,...
Partial discharges (PDs) phenomena in medium-voltage switchgears usually exist and are worth being paid more attention. In this paper, a kind of special switchgear cabinet and two kinds of typical PD sources is designed for the PD measurements. Based on the two typical PD models, measurement sensitivity and influence factors of above four kinds of detection methods are researched and analyzed. The...
Quasi-periodic signals can be modeled by their second order statistics as Gaussian process. This work presents a non-parametric method to model such signals. ECG, as a quasi-periodic signal, can also be modeled by such method which can help to extract the fetal ECG from the maternal ECG signal, using a single source abdominal channel. The prior information on the signal shape, and on the maternal...
Measuring the geometric structural traits of plants, especially the shape of leaves, plays an important role in the agricultural science. However, most existing techniques and systems have limited overall performance in accuracy, efficiency and descriptive ability, which is insufficient for the requirements in many real applications. In this study, a new kind of sensing device, the Kinect depth sensor...
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