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The extremely cold environment experienced by outboard cables used in the Earth's polar regions necessitates careful selection of polymers for use as jackets. The U.S. Navy has two specifications for neoprene (polychloroprene) cable jackets — one designated “Arctic neoprene” because of its extreme low temperature flexibility requirement (−54°C) and the other designated by default as “standard neoprene”...
An octopus arm is boneless and mostly composed of muscles placed in the various directions around the nerve. The muscle is placed in three directions mainly, the octopus arm can perform multiple functions such as the contracting, bending, torsion, and stiffness change by driving the muscles selectively. We have developed a flexible manipulator using thin McKibben actuators by imitating the structure...
Water droplets on the surface of silicon rubber were investigated under the influence of non-uniform electric fields. Several parameters of water droplets were investigated, such as the positioning of the droplets regarding the electrodes. The most striking conclusion is that the flashover voltage and electric field distribution depends on the positioning of the droplets from the electrodes.
Targets with known target strength are widely used in underwater acoustic experiments. Scattering theory shows that the target strength of objects made with regular material falls rapidly with the decrease of incident field frequency. The low-frequency target strength of air-filled objects is much higher than rigid objects with the same size because of resonance inside. Therefore air-filled objects...
The section size of the tread is an important index to judge the quality of the tread. To avoid the disadvantages of the contact-type manual measuring method, this paper designs a kind of on-line tread section scanning system based on the laser triangulation technique. Through the formula derivation, the measurement model is established, and the measurement precision is analyzed from both the theory...
Currently, poor sitting posture has been proven to be the cause of many diseases, such as pressure sore, spinal injury, lumbar disc. For this reason, in order to achieve the detection of body posture pressure to prevent the bad posture, this paper presents an effective monitoring system of the human body sitting posture pressure based on the flexible tactile sensor — conductive rubber. The results...
Science and Education is an elective course for all undergraduates of Universidad de los Andes, a Colombian institution. This course is designed to promote a scientific mindset while learning how to teach STEM concepts. During the third week of the course, students must identify teammates for a 3-month project. Because the team lasts almost the entire term, it is important to be able to identify complementary...
In order to further improve the riding comfort of trackless rubber tire vehicle, to ensure the safety of coal mine underground transportation, a quarter vehicle of the dynamics equation was established for two-degree of freedom suspension system. And the underground road roughness value of the input signal was calculated. Then based on the Simulink module of MATLAB software, the mathematical simulation...
With the wide use of rubber as high performance sealing material in aerospace field, an effective nondestructive testing method is urgently needed to detect the product quality and thickness distribution of rubber materials. In this paper, the sample made by rubber material and metal plate bonding was detected by the reflective THz time-domain spectroscopy system. In order to avoid the problem of...
This study extends existing Rubber Hand Illusion (RHI) experiments to employ life-size full-body humanlike android robot to investigate body ownership illusion and the sense of agency. For this study, we designed a novel experimental setting. The android robot moved synchronously with a participant's head and arm motion. Furthermore, a stereoscopic camera was mounted on the android's head and the...
This paper presents a method to deliver soft tactile textures on a hard touch panel, using an electrostatic tactile feedback display, which produces high-frequency frictional textures with extremely low-frequency friction stimuli. Through experiments involving several participants, we found that low frequency signals are effective at transmitting soft sensations. Although the underlying mechanism...
It was estimated that annual cost of measurable medical errors was higher than $17 billion in 2008. Phantoms are objects manufactured using a tissue mimicking material (TMM) and largely used to test protocols and mimic clinical environment for medical training. TMM should reproduce at least one biological property to allow the association with clinical situation. The gel made by the copolymer styrene-ethylene/butylene-styrene...
Phantoms are objects manufactured using a tissue mimicking material (TMM) and largely used to test protocols and mimic clinical environment for medical training. The TMM should reproduce at least one biological property to allow the association with clinical situation. The gel made by the copolymer styrene-ethylene/butylene-styrene (SEBS) in mineral oil previously reported by our group is a stable...
Gas insulated switchgear (GIS) is a compact metal encapsulated switchgear consisting of high-voltage components such as circuit-breakers and disconnectors, which can be safely set up in confined spaces. However, some GISs have been used for more than 40 years, so characteristic of sealing rubber is considered to be degraded. We find possibility of aging of the sealing rubber by comparing surface characteristics...
Erosion of weathershed composite materials is one of the key failure modes in outdoor insulators and it can adversely impact on the reliability of power system networks. To enhance resistance against erosion and dry band arcing, inorganic particles are often added to base polymeric matrix. This paper investigates the erosion resistance of micron-AlN and hybrid micron-AlN + nano-silica filled silicone...
This manuscript evaluates an influence of our basic idea of a long arrow-mouse cursor and visibility of the hand on a sense of self-ownership for improving the performance of mouse manipulation. A long arrow-mouse cursor is a designed mouse cursor represented by a long arrow that starts closely at your body and ends to a target. A sense of self-ownership is a feeling of belonging to ones body. This...
Designing a multi-robot system provides numerous advantages for many applications such as low cost, multi-tasking and more efficient group work. However, the rigidity of the robots used in industrial and medical applications increases the probability of injury. Therefore, lots of research is done to increase the safety factor for robot-human interaction. As a result, either separation between the...
Silicone rubber is widely used in power equipment such as cable joint. In order to get better performance of insulator, it is significant to evaluate the insulation condition of aged silicone rubber insulators. Thus in this paper, surface potential decay measurement has been applied to investigate the performance of pristine and aged silicone rubber. Pristine and aged silicone rubber samples are charged...
An endoscopic soft robot, capable of assisting medical professionals during Gastrointestinal Tract (GIT) procedures was developed. The endoscope was designed and built using soft robotics technology to provide a low cost solution to the public healthcare sector. The endoscope functionality was aimed at providing imaging, biopsy and automatic navigation capabilities. The final product was evaluated...
The aim of this study is to develop new room temperature vulcanization (RTV) silicone rubber nanocomposites for application to outdoor polymer insulator. This paper deals with effects of addition of nano-scale boehmite filler on tracking, erosion resistance and arcing resistance of silicone rubber. The inclined plane test and the arc resistance test were performed. As a result, it was elucidated that...
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