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Integrating thermal interactions in multimodal systems requires understanding both users sensory abilities and the thermal behaviors of the surrounding environement. Thermal feedback, as a part of haptic feedback can assist in object identification, or in the creation of a more complete haptic signature of a given object. However, the heat exchange occurring between a fingertip and a given touched...
In this paper attention is devoted on searching a proper model for characterizing the behavior of giant reeds. To aim at this, firstly, meticulous experimental tests have been performed in the Laboratory of structural materials of University of Palermo. Further, the novel aspect of this paper is that of using an advanced Euler-Bernoulli model to fit experimental data of bending tests. Such a model...
The influence of viscoelastic behavior of polybutylene terephthalate (PBT) on reliability of the thermal contact of a spotlight module is evaluated. The contact between a module and the heat sink is evaluated using non-linear finite element model. The viscoelastic behavior of PBT was obtained under multiple frequencies from single cantilever DMA experiments. The relevant viscoelastic parameters (i...
Haptic devices are dedicated to render virtual tactile stimulation. A limitation of these devices is the intrusiveness of their mechanical structures, i.e. the user need to hold or wear the device to interact with the environment. Here, we propose a concept of new tactile device named HAIR. The device is composed of a computer vision system, a mechatronic device and air jets that stimulate the skin...
While there has been a steady progression of research in robotic and mechatronic systems that utilize nickel titanium alloy (Nitinol) as an actuator, the design of the antagonistic element for the inherently “one-way” technology has not been thoroughly investigated and described. In this paper, we discuss the properties of Nitinol-based shape memory alloy actuators as they relate to the design of...
This paper presents a systematic method for experimental characterization of Bowden cable friction. A novel tension measurement method using a motion capture system and a spring is introduced. With the tension measurement method, the effects of nine variables on friction are investigated. Experimental results show that i) a combination of 7×19 FEP-coated stainless steel cable and double-sheaths has...
In this paper, tin whisker behaviour of electroplating tin coating was studied in different environments. Different thickness of electroplating tin coating on copper substrate had been tested. Two different environmental conditions had been applied :one temperature tests (70 °C)and one external force tests(70 °C /17.5N). The growth of tin whisker was studied by using scanning electron microscopy (SEM)...
This paper describes a methodology for capturing the tacit knowledge of the manual grinding and polishing process. Key Process Variables (KPVs) i.e. contact force, tool path, feed rate, etc. of the manual operator performing the task are captured with a ‘sensorised’ hand-held belt grinder, while the changes to the work-piece geometry is captured using a 3-D laser scanner. These KPVs are fed into an...
Solid-state bonding refers to the bonding of solid material A and solid material B. Numerous experimental data have shown this possibility. Neither principle nor theory at the atomic level has been reported. How is solid-state bonding possible? Fundamentally, it is possible only if materials A and B can be brought within atomic distance. Over the years, we have proposed the principle: “As A atoms...
Screw path drilling is an important process among many orthopedic surgeries. To guarantee the safety and correctness of this process, a model-based drilling state recognition method is proposed in this paper. The thrust force in the drilling process is modeled based on an accurate 3D bone model restructured by means of Micro-CT images. In theoretical modeling of the thrust force, the resistance and...
In this paper we study the possibility to use a transverse flux linear generator (TFG) because transverse flux technology presents the highest force density per volume index among the iron based electrical machines. This paper is organized as follows an introduction to describe “state of the art”of WEC's and TFG, in the Section II we find a summary description of the marine condition of the chosen...
In this study, a novel design of microneedle is proposed based on structural and fluidic analysis. For blood collection applications, a hollow microneedle is designed with optimal features. The features and size of this microneedle provide improved structural strength for optimal skin penetration. Mechanical evaluations are studied with intensive calculations of maximum allowance axial and transverse...
The purpose of this project is to develop a puncture proof surgical retraction device to aid in surgery, particularly abdominal/thoracic surgery. The client, Dr. Adam D Fox of the division of trauma surgery and critical care at Rutgers University School of Medicine asked for a surgical device to prevent common workplace needle stick injuries that occur during suturing due to the close proximity of...
The exceptional chemical, mechanical and thermal properties of diamond make this material the ideal choice for resonant MEMS. Cantilevers designed for biochemical applications have been fabricated using CVD diamond. In this work, the mechanical properties of these cantilevers were investigated by two different techniques: bending test using a Contact Surface Profilometer and resonant test, using a...
The main scope of this paper is to investigate the adhesion effect on the mechanical response of MEMS components from RF switch application by using an atomic force microscope (AFM). The occurrence and strength of adhesion effects in MEMS devices depend on a variety of environmental, geometrical and operational parameters (temperature, relative humidity, contact area, surface energies of contact materials,...
Since uncontrolled force can cause drill-bit break-age, excessive heat generation, and bone damage, prediction of the drilling force is important parts to increase success rate of implant operations. This paper presents a vibration model for prediction of the drilling vibration. The force from the drill is modeled by considering variation in force caused by CT value and feed velocity change. This...
Flexible actuator is a kind of actuator which consists of linear motor and thrust wire. Its characteristic is to transmit the force from tip to tip. Therefore, it is possible to design light weight robot without considering the location of actuator. Thanks to this advantage, it is useful for many kinds of robot - teleoperational robot, finger robot, and so on. However, force transmission ability of...
In this paper, we investigate various possibilities of applying an integrated approach to Concept Inventory (CI) in statistics classes. The paper defines Concept Inventory, states the basic principles and goals of the CIs and respective tests, and outlines current state of related research. The paper sketches possible uses of CIs in various Statistics classes and discusses introduction of the concept...
In this paper the architectural features of a remote laboratory for the study of mechanical properties of materials are considered and the role of the remote lab in the blended learning in Material Sciences
Remote Lab experiments are commonly used among universities and companies to provide access to setups that otherwise would not be available. In this paper different analytical and numerical procedures were used to extend the applications of a current remote system. The results are then compared with the experimental data obtained from the remote experiment, available in http://elabs.fe.up.pt. The...
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