The perceptual abilities to be aware of the state of the outside world are indispensable for all living things to keep on living. Humans gather information through the five senses of sight, hearing, taste, smell, and touch. We use that information to recognize and understand the situation surrounding us with our superior intelligence. We then perform advanced actions and judgments. Looking at it comprehensively, the perceptual abilities of humans are probably among the best in the living world.However, if we focus on individual perceptual abilities, we find that there are many living things with abilities superior to those of humans. We are no match for the compound eyes of dragonflies when it comes to a sense of sight, whereby the movements of things are perceived in the surroundings. Furthermore, we can't compete with dogs in terms of our senses of hearing and smell. There are even living things that have the ability to capture information that cannot be detected by humans in the first place. Examples of these include migratory birds that determine their direction of flight by perceiving geomagnetism. If we stretch our imaginations further, there may even be perceptive abilities that capture information that living things in existence cannot detect.If we could acquire perception beyond the five senses of humans with the assistance of machines, how would it change our lives and society? We introduce trends in the development and utilization of technologies that realize the super-five senses.<h2>Extending Our Perceptual Abilities Utilizing Evolving Sensors and AI</h2>Sensors are electronic devices with the function to acquire information from the outside world. There are already a wide variety of sensors that can reproduce the five senses of humans. Image sensors, microphones, accelerometers, and temperature sensors are examples of those. There are also many sensors that have performance that exceeds the abilities of humans. For instance, there are infrared ray image sensors capable of detecting the existence of things in the dark. Furthermore, there are also sensors that can acquire information that cannot be detected by humans. Examples include geomagnetic sensors and CO2 sensors.Advances in sensor technologies have made it possible to realize the ability to gather information far beyond the abilities of humans. Nevertheless, even if the range of information we can obtain expands and diversifies, it does not mean it is possible to extend the perceptual abilities of humans. We cannot improve our perceptual abilities without also improving our ability to appropriately process the information we have collected at the same time.&nbsp;For example, facial recognition technology has come to be used for the personal verification of visitors when holding sports and other events. It has also become possible for visitors to gain admission to venues using a face pass without the need for a ticket by registering their image data in advance. Furthermore, in recent years, it has become possible to simultaneously recognize those who can enter and those who have not purchased a ticket by collectively recognizing images of crowds captured by cameras. This has made it possible to smoothly guide people into the venue without lines. In addition, technology has evolved to the point where it is possible to estimate the age and gender of visitors.<img src="https://s3-us-west-1.amazonaws.com/wevolver-project-images/froala%2F1696846836897-super5sense6-01.jpg" style="width: 766px;" class="fr-fic fr-dib">It can be said that such advanced perceptual abilities using machines are the super-five senses beyond the abilities of humans. However, in this example, the super-five senses have not been realized by an evolution in the performance of the sensors that collect the information; or, in other words, the performance of the cameras. The super-five senses have been realized by the evolution of the artificial intelligence (AI), which is utilized in the recognition processing of the acquired images.&nbsp;<h2>Detecting Machine Failures from Noises and Vibrations and Cancer from Exhaled Breath</h2>The advanced perceptual abilities of humans are realized by combining the detection abilities of the sensory organs like the eyes and ears and the cognitive abilities of the brain (Fig. 1). In a similar scheme, the super-five senses will be realized by advancing sensors and AI and then utilizing those technologies in combination. We would now like to introduce just a few examples from among those of the super-five senses already being put into practical use or under development.<img src="https://s3-us-west-1.amazonaws.com/wevolver-project-images/froala%2F1696846855213-super5sense6-02_en.png" style="width: 766px;" class="fr-fic fr-dib">Fig. 1: The perceptual abilities of both humans and machines comprise a combination of detection (information gathering) and cognition (information processing) abilitiesThe super-five senses are already being utilized in many cases in the field of monozukuri. Some factories that produce industrial products employ experienced workers with the ability to sense signs of failure in devices. They do that by identifying the slightest abnormal sounds mixed in with the sounds of those devices operating. This is a personal skill acquired through experience over many years. It can be said that this is an advanced perceptual ability that regular people do not possess. However, high-precision accelerometers are nowadays being mounted to such devices. This has enabled the detection of signs of failure by utilizing AI from the slightest changes in the vibrations of those devices. Moreover, technologies are also being put into practical use that pinpoint the place where abnormal sounds are being emitted on images captured by cameras through catching the slightest abnormal sounds. This is an example of the realization of perceptual abilities not possessed by humans in terms of converting auditory information into visual information.The super-five senses are also starting to be utilized in the field of medicine. A variety of information that reflects the physical and health condition of humans is contained in the things we excrete from our bodies. One of those is the air we exhale when we breathe. It is known that exhaled breath contains components that indicate signs of cancer, appearing as a change in odor. Nevertheless, the change in odor is extremely slight. Accordingly, it is difficult to detect such a change with the human sense of smell. However, there are cases of specially trained dogs called "cancer detecting dogs" being used to detect cancer. That is because dogs have a superior sense of smell that can discern such a change. Many companies and research institutions are carrying out R&amp;D to mechanize this ability by combining a gas sensor that detects the components contained in exhaled breath with AI and other information processing systems. If such a function is installed on a smartphone where exhaled breath is blown during a phone call, it may be possible to achieve a state as though the user was undergoing cancer screening on a daily basis. In addition, attempts are also underway to analyze acetone contained in exhaled breath and to then utilize that analysis in lifestyle-related disease prevention, dieting, and other areas of health.<h2>HSI That Finds Valuable Information from Invisible Light</h2>Furthermore, technologies that acquire information that cannot be obtained from visible light are being developed and utilized. This is done by combining image sensors that detect light with wavelengths that cannot be detected by humans such as ultraviolet rays and infrared rays with AI and other advanced information processing technologies. This technology is called hyperspectral imaging.It may be possible to acquire unexpectedly high-added-value information depending on the method of processing the information obtained from visible light as well. For instance, the nutrient of lycopene contained in tomatoes absorbs blue and green light. Therefore, tomatoes that contain lots of lycopene have a bright red appearance. In other words, we can detect nutrients from color. We can acquire even more diverse information without contact by also applying techniques with similar principles to light other than visible light.For example, it is possible to identify or otherwise recognize the state of pollution in the land, atmosphere, and water and the types of trees growing on the surface from images taken with visible light and infrared rays from an artificial satellite. In addition, it is also possible to discover contamination by foreign substances or abnormal ingredients in food production lines and to evaluate the content of specific amino acids including oleic acid, which is an umami (savory) ingredient. We can also check the health condition of people based on changes in their complexion that cannot be detected by the human eye.There is still room for significant advances in both sensors and AI. As a result, it seems there are infinite possibilities for what kind of super-five senses humans will acquire in the future.<hr><img src="https://s3-us-west-1.amazonaws.com/wevolver-project-images/froala%2F1696846884169-1696846884169.png" class="fr-fic fr-dii">If you have any questions based on this article that you would like to discuss with an expert at Murata, don't hesitate to reach out. There's an entire team ready to support you with your question.<a href="https://www.murata.com/en-eu/contactform?&Detail=Wevolver%20request" target="_blank" rel="nofollow" class="button-main-action">GET IN TOUCH</a>

Sensors are electronic devices with the function to acquire information from the outside world. There are already a wide variety of sensors that can reproduce the five senses of humans. Image sensors, microphones, accelerometers, and temperature sensors are examples of those.

Super-Five Senses Created by Combining and Utilizing Sensors and AI

Knowing the distance between two short-range transceivers is useful for many applications. Examples include proximity measurement for making sure people maintain a set distance apart for safety reasons, indoor navigation, and tracking items in a warehouse.There are several techniques for measuring distance from straightforward received signal strength indicator (RSSI) and time-of-flight (ToF), through more complex phase-based measurements to advanced techniques such as Inverse Fast Fourier Transform (IFFT) and estimation of multipath channel impulse response from frequency spectrum measurements. Each trades off some combination of accuracy, resolution, calculation time, processing resource, and energy.It&#39;s possible to try out each of these techniques to find out which is best for your applications using the Nordic Distance Toolbox (NDT). NDT is a proprietary technology that&rsquo;s an easy-to-use development tool for measuring the distance between two Nordic short-range radios. It is included in Nordic&rsquo;s <a href="https://www.nordicsemi.com/Products/Development-software/nRF-Connect-SDK?utm_campaign=2021%20wevolver" rel="noopener noreferrer" target="_blank">nRF Connect SDK</a>, the company&rsquo;s scalable and unified software development kit. Let&rsquo;s take a closer look at these various distance measuring techniques.<h2>Using signal intensity to estimate distance</h2>While not able to focus a signal nor determine the direction from which it has come, a short-range radio such as a Bluetooth LE transceiver with a single antenna can measure signal strength, the frequency of the incoming signal, its phase, and its time of arrival. This information is useful for estimating the distance to the transmitter.When transmitting, the short-range radio broadcasts a 2.402 to 2.480 GHz signal that forms a sphere expanding at the speed of light. As the sphere propagates, the intensity (power per unit area) of the signal in a vacuum and without obstructions drops off according to the formula 1/r2 (where &ldquo;r&rdquo; is the radius of the sphere). With knowledge of the original transmission power and incoming signal strength, the receiver can therefore work out approximately how far it is from the transmitter.But a vacuum without obstructions is not the usual operating environment for a short-range radio. In typical use, for example, in a house or an office, the intensity drop will be greater. To compensate and improve distance measurement accuracy, engineers instead use the formula 1/rn where &ldquo;n&rdquo; is the &ldquo;path loss factor&rdquo;. For example, in a home with walls made of wood, n is around 4.5.RSSI is a cheap and inexpensive way to estimate the distance between two transceivers. The downside is that the path loss factor introduces errors even if it has been carefully assessed for an anticipated operating scenario. Nordic conducted some tests in an office environment that compared the distance between two short-range radios measured very precisely using LIDAR with those obtained from RSSI measurements. RSSI proved precise up to a few meters, but beyond that distance estimates became increasingly inaccurate. When people were moving through the measurement area, RSSI precision deteriorated markedly, and the useable range dropped to half a meter.<h2>Time-of-Flight and phase measurements</h2>A second technique that brings greater precision to distance measurement is ToF. The technique measures the time it takes for a signal to travel from the transmitter to the receiver and back, and then calculates the distance based on the speed of light. (ToF (seconds)/2 x c (meters per second) = distance to object (meters).) There is a small correction, because the receiving radio will require a short but finite time to switch from receive to transmit and &ldquo;reflect&rdquo; the signal back. However, such a correction is easily included in the distance calculation.A third technique that also offers greater accuracy than RSSI is phase measurement. It&rsquo;s a technique that has been used for many years in radar installations. The math is complex, but in essence the measurement relies on different radio frequencies having different wavelengths. A 2.4 GHz signal, for example, has a wavelength of 12.5 cm, whereas a 2.48 GHz signal has a slightly shorter wavelength of 12.1 cm.Over two meters, for example, a 2.4 GHz signal will oscillate exactly (2/0.125) 16 times so its phase at the receiver will be the same as when it left the transmitter. However, a 2.48 GHz signal will oscillate (2/0.121) 16.53 times. That extra 0.53 of a cycle will mean that the received signal is (2&pi; x 0.53) 1.06&pi; out of phase compared with the transmitted signal.For a given distance, phase measurements across a range of frequencies results in a linear phase variation with a measurable gradient. Changing the distance alters the gradient of the phase variation with a steeper gradient representing a greater range. With knowledge of the gradient change for a set of reference distances, in a practical situation, it is relatively simple to correlate a measured gradient to the actual distance between the two transmitters. &nbsp; &nbsp;Nordic&rsquo;s tests using the LIDAR comparison showed that both ToF and phase measurement offer reasonable accuracy and are not affected by the signal attenuation that plagues RSSI measurements. For shorter distances (up to ten meters), phase measurement offers greater precision. Over long distances (up to several hundred meters), phase measurement tends to become less precise and ToF is a better way to measure the distance between the radios. Note that both the ToF and phase change techniques require a two-way connection between transmitter and receiver, unlike RSSI.<h2>Greater precision but increased complexity</h2>If the precision offered by ToF or phase measurement is still not adequate for an application, there are two more methods supported by Nordic Distance Toolbox that offer even greater accuracy. One uses Inverse Fast Fourier Transform (IFFT) techniques and the other uses an estimation of multipath channel impulse response from frequency spectrum measurements.These techniques are complex, and both rely on sophisticated analysis of the transmitted and received signals. However, the result is a precise and repeatable measurement of the distance between the short range radios. The trade-off with both techniques is that they demand a high level of computing resources and long processing time that consumes energy and hence impacts battery life.Nordic&#39;s tests revealed that IFFT produces a good correlation to the actual distance measured by LIDAR and is more accurate than RSSI, ToF and phase measurement, although some outlier filtering is likely to be required to get the best results. The estimation of multipath channel impulse response measurement is even better than IFFT, producing high precision results; but it also requires outlier filtering and features longer processing times than the other techniques. However, if the highest precision distance measurement is needed for the application, then the energy trade-off could be worth it.<h2>Nordic Distance Toolbox does all the work</h2>The Nordic Distance Toolbox included with Nordic&rsquo;s nRF Connect SDK is useful for testing various distance measurement techniques with Nordic short-range radio SoCs and includes a quality indicator to provide a degree of confidence in how accurate the measurement data is likely to be. Distance is computed based on all intensity, frequency, and phase information available to the transceiver and all calculations are completed inside the toolbox.Nordic Distance Toolbox currently offers experimental support for <a href="https://www.nordicsemi.com/Products/nRF52833?utm_campaign=2021%20wevolver" rel="noopener noreferrer" target="_blank">nRF52833</a>, <a href="https://www.nordicsemi.com/Products/nRF52840?utm_campaign=2021%20wevolver" rel="noopener noreferrer" target="_blank">nRF52840</a>, and <a href="https://www.nordicsemi.com/Products/nRF5340?utm_campaign=2021%20wevolver" rel="noopener noreferrer" target="_blank">nRF5340</a> and includes measurement support for: RSSI; ToF; phase slope estimation; IFFT; and estimation of multipath channel impulse response from frequency spectrum measurements.<hr id="isPasted">This article was first published on Nordic&#39;s <a href="https://blog.nordicsemi.com/getconnected" target="_blank" rel="nofollow"></a><a href="https://blog.nordicsemi.com/getconnected?utm_campaign=2021%20wevolver" target="_blank" rel="nofollow">Get Connected Blog</a>. &nbsp;

Knowing the distance between two short-range transceivers is useful for many applications. Examples include proximity measurement for making sure people maintain a set distance apart for safety reasons, indoor navigation, and tracking items in a warehouse.

Using the Nordic Distance Toolbox to measure the distance between short-range radios

In this episode, we discuss the accidental discovery of how amputees can sense temperature in their phantom limbs and how EPFL researchers have exploited this to develop the first generation of prosthetics that can feel.

Podcast: Amputees Feel Warmth In Their Missing Hand

In this article, we will dive deep into the world of simultaneous localization and mapping using Lidar technology. Lidar SLAM has been gaining popularity in recent years, thanks to its versatility and applications across various domains, including autonomous vehicles, mobile robotics, and indoor mapping.

Lidar SLAM: The Ultimate Guide to Simultaneous Localization and Mapping

Lidar and Radar are two popular remote sensing technologies used for detecting and measuring the distance of objects. Lidar works by emitting a laser beam and measuring the time it takes for the reflected light to return to the sensor, while Radar uses radio waves to detect and locate objects. In this article, we’ll focus on the differences between Lidar and Radar. Lidar is more accurate and provides more detailed 3D mapping, while Radar is more versatile and can operate in a wider range of conditions. Both technologies have their own advantages and are used in a variety of applications.

Lidar vs. Radar: Comprehensive Comparison and Analysis

 Innovations such as biomimicry, software inspired by insect brains, smart skin, neuromorphic computing, and other emerging technologies further expand robots' capabilities and push the boundaries of robotics hardware.

The 2023 Manufacturing Robotics Report: Hardware

If you&rsquo;ve ever tried giftwrapping an odd-shaped present like a teddy bear, you can appreciate the challenge that surgeons face when grafting artificial skin onto an injured body part. Like wrapping paper, engineered skin comes in flat pieces, which can be difficult and time-consuming to stitch together around an irregularly shaped body part.Bioengineers at Columbia University appear to have solved this problem by devising a way to grow engineered skin in complex, three-dimensional shapes, making it possible to construct, for example, a seamless &ldquo;glove&rdquo; of skin cells that can be easily slipped onto a severely burned hand.The researchers reported their findings in a paper published Jan. 27 in&nbsp;<a data-extlink="" href="https://www.science.org/doi/10.1126/sciadv.ade2514" rel="noopener noreferrer" target="_blank">Science Advances(link is external and opens in a new window)</a>.&ldquo;Three-dimensional skin constructs that can be transplanted as &lsquo;biological clothing&rsquo; would have many advantages,&rdquo; says lead developer&nbsp;<a href="https://www.dermatology.columbia.edu/profile/hasan-e-abaci-phd" target="_blank">Hasan Erbil Abaci, PhD</a>, assistant professor of dermatology at Columbia University Vagelos College of Physicians and Surgeons. &ldquo;They would dramatically minimize the need for suturing, reduce the length of surgeries, and improve aesthetic outcomes.&rdquo;The current study also revealed that the continuous 3D grafts have better mechanical and functional properties than conventional, pieced-together grafts.<h2>3D scaffolding</h2>The process of creating the new skin grafts begins with a 3D laser scan of the target structure, such as a human hand. Next, a hollow, permeable model of the hand is crafted using computer-aided design and 3D printing. The exterior of the model is then seeded with skin fibroblasts, which generate the skin&rsquo;s connective tissue, and collagen (a structural protein). Finally, the outside of the mold is coated with a mixture of keratinocytes (cells that comprise most of the outer skin layer, or epidermis) and the inside is perfused with growth media, which support and nourish the developing graft.Except for the 3D scaffold, the researchers employed the same procedures used to make flat engineered skin and the entire process took the same time, about three weeks.In a first test of the 3D engineered skin, constructs composed of human skin cells were successfully grafted onto the hind limbs of mice. &ldquo;It was like putting a pair of shorts on the mice,&rdquo; Abaci says, &ldquo;The entire surgery took about 10 minutes.&rdquo; Four weeks later, the grafts had completely integrated with the surrounding mouse skin, and the mice reacquired full functions of the limb.Mouse skin heals differently than human skin, so the researchers next plan to test the grafts on larger animals with skin biology that more closely matches that of humans. Clinical trials on humans are likely years away.<h2>Redesigning engineered skin</h2>The 3D grafts are the first major re-design of engineered skin grafts since they were first introduced in the early 1980s. &ldquo;Engineered skin started with only two cell types, but human skin has around 50 types of cells. Most research had focused on mimicking the cellular components of human skin,&rdquo; Abaci says. &ldquo;As a bioengineer, it&rsquo;s always bothered me that the skin&rsquo;s geometry was overlooked and grafts have been made with open boundaries, or edges. We know from bioengineering other organs that geometry is an important factor that affects function.&rdquo;Abaci and his team realized they could make more lifelike grafts when 3D printers became available and could create three-dimensional scaffolds necessary for making the engineered skin.&ldquo;We hypothesized that a 3D fully enclosed shape would more closely mimic our natural skin and be stronger mechanically, and that&rsquo;s what we found,&rdquo; Abaci says. &ldquo;Simply remaining faithful to the continuous geometry of human skin significantly improves the composition, structure, and strength of the graft.&rdquo;In the future, Abaci envisions grafts could be custom-made from a patient&rsquo;s own cells. With only a 4X4 mm skin sample, enough cells can be cultured and multiplied to create enough skin to cover a human hand.&ldquo;Another compelling use would be face transplants, where our wearable skin would be integrated with underlying tissues like cartilage, muscle, and bone, offering patients a personalized alternative to cadaver transplants,&rdquo; Abaci says.<hr>The study is titled &ldquo;<a href="https://epicure.cumc.columbia.edu/content/about-epicure-center" target="_blank">Engineering Edgeless Human Skin with Enhanced Biomechanical Properties</a>.&rdquo;The other contributors (all at Columbia University): Alberto Pappalardo, David Alvarez Cespedes, Shuyang Fang, Abigail R. Herschman, Eun Young Jeon, Kristin M. Myers, and Jeffrey W. Kysar.

Creating a "glove" of engineered skin begins with a 3D-printed scaffold and ends three weeks later with a construct ready for grafting. Images: Alberto Pappalardo and Hasan Erbil Abaci / Columbia University Vagelos College of Physicians and Surgeons.

Columbia University devising a way to grow engineered skin in complex, three-dimensional shapes, making it possible to construct, for example, a seamless “glove” of skin cells that can be easily slipped onto a severely burned hand.

Bioengineered Skin Grafts that Fit Like a Glove

Announcing TechBlick&#39;s&nbsp;open free-to-attend&nbsp;virtual conference and exhibition day on 2 DEC 2022 from 13:00 CET to 19:00 CET. The conference will offer the following two parallel tracks:<ul><li dir="ltr">Track 1: &nbsp;Printed, Flexible, Hybrid, 3D Electronics: Innovation Showcase Day</li><li dir="ltr">Track 2: Wearable Sensors and Therapeutics, E-Textiles, and Continuous Vital Signs Monitoring</li></ul>You can view the combined agenda&nbsp;and register free&nbsp;<a href="https://techblick-dot-yamm-track.appspot.com/2ISOs9hOMy2x8pbhQhl6KSSvgJLWIkOrG6xamhF4N_XNJc7g4hAHrTK3lmPs6viFvxTWpwv-ZckWPjtUPOAWzWbCua0Z6ORGl6JITifLNV7zXxNP6u2slSvhW_RP_2SY2c1JW8AOJI3cmvLbxsAYYVpfxKU3_2gHjvUnYyyQoFx3X0bYTw_lxzeKOy3sdQyPw0xfcZeUBrfUVgA" target="_blank">here.</a>&nbsp; It is a unique event with two-parallel live tracks, a live engaging exhibition floor, and 400+ attendees. &nbsp;The exhibiting companies include the likes of Voltera, Epishine, Dupont Teijin Films, DoMicro, Copprint, InnovationLab, NovaCentrix, PulseForge, Fujikura Kasei, ImageXpert, Panacol, Neotech AMT, Celanese, Applied Materials, Coatema, Sateco, IDS, Ames Goldsmith, Kimoto, Encres Dubuit, Raymor, Quad Industries, Ynvisible, Brilliant Matters, CondAlign, DTI, and many moreFull AgendaThe times below is Central European Times (CET) / Berlin time.<img src="https://s3-us-west-1.amazonaws.com/wevolver-project-images/froala%2F1668430736253-speakers+lpogos.jpg" style="width: 695px;" class="fr-fic fr-dib">1:00pm &nbsp;ATT Advanced Thermal Technologies | How to keep Cameras, RADAR &amp; LiDAR Sensors free of Snow &amp; Ice by means of Printed Electronics &nbsp; 01:00pm&nbsp;&nbsp;DTI |&nbsp;Advance printed electronics and standardization within the smart wearables industry.01:15pm&nbsp;&nbsp;Singapore Institute of Manufacturing Technology (SIMTech) |&nbsp;Development of smart apparel for bio-signal measurement &nbsp;&nbsp;01:15pm&nbsp;&nbsp;VTT |&nbsp;Pilot factory for converting of next generation wearables towards high quality manufacturing processes &nbsp;&nbsp;01:30pm&nbsp;&nbsp;NexStem |&nbsp;Wearable Brain-Computer Interfaces (BCIs) - Measuring Signals Beyond Patches &nbsp;&nbsp;01:30pm&nbsp;&nbsp;Silicon Austria |&nbsp;Advancements in hybrid flexible electronics towards ultra-fine pitch chip bonding &nbsp;&nbsp;01:45pm&nbsp;&nbsp;ISRA |&nbsp;Fab-as-a-Service: prototyping &amp; manufacturing of copper based printed electronics devices &nbsp;&nbsp;01:45pm CondAlign&nbsp;| (TBC)02.00pm &nbsp;Exhibition &amp; Networking Break &nbsp;&nbsp;02:45pm &nbsp;Encres DUBUIT | Transparent and conductive films based on nanocellulose.&nbsp;02:45pm &nbsp;Zimmer Peacock | Printed Wearable Sensors for Sports and Athletic Performance &nbsp;03:00pm &nbsp;Binder ITZ | Printed sensors on 3D surfaces &nbsp;&nbsp;03:00pm &nbsp;EastPrint | (TBC) Wearable Biosensors: Overview of Printing Techniques03:15pm&nbsp;&nbsp;FLEEP Technologies |&nbsp;PrintIC: integrated circuits can be printed! &nbsp;&nbsp;03:15pm&nbsp;&nbsp;X-trodes |&nbsp;Soft electrode array for skin electro-physiology: New opportunities in sleep studies and rehabilitation &nbsp;&nbsp;03:30pm&nbsp;&nbsp;EERS Global Technologies/ &Eacute;cole de technologie sup&eacute;rieure |&nbsp;(TBC) In-Ear Sensors To Measure Biometric Data and Brain Signals: Present and Future &nbsp;&nbsp;03:30pm&nbsp;&nbsp;Marquardt Group |&nbsp;Fully printed organic photo sensor to supervise display functionality &nbsp;&nbsp;03:45pm&nbsp;&nbsp;University of Chicago |&nbsp;Skin-like wearable electronics with artificial-intelligence computing &nbsp;&nbsp;03:45pm&nbsp;&nbsp;e2ip |&nbsp;(TBC) InMold Electronics: Achieving ultra complex shapes with molecular inks &nbsp;&nbsp;4.00pm &nbsp;Exhibition &amp; Networking Break &nbsp;&nbsp;04:55pm&nbsp;&nbsp;Georgia Institute of Technology |&nbsp;Soft Wearable Bioelectronics for Human Healthcare and Human-Machine Interfaces &nbsp;&nbsp;04:55pm&nbsp;&nbsp;Murata Manufacturing |&nbsp;Highly Conductive MXene for Electronics &nbsp;&nbsp;05:10pm&nbsp;&nbsp;NAMICS Technologies |&nbsp;Low temperature sintering nano silver paste &nbsp;&nbsp;05:10pm&nbsp;&nbsp;University of Texas |&nbsp;Graphene based electronic tattoo technologies for complex electrophysiology &nbsp;&nbsp;05:25pm&nbsp;&nbsp;Tampere University |&nbsp;Arterial Pulse Wave Monitoring: Self-Powered, Highly Unobtrusive, Low-Cost and Accurate &nbsp;&nbsp;05:25pm MacDermid&nbsp;| (TBC) Ultralow temperature solder and pastes for InMold Electronics and Flexible Hybrid Electronics05:40pm&nbsp;&nbsp;MesoMat |&nbsp;Stretchable piezo-resitive yarns for strain sensing in high deformation systems &nbsp;&nbsp;05:40pm&nbsp;&nbsp;NanoPrintek |&nbsp;Dry Multimaterial Printer: An Ink-less Technology with On-Demand Generation and Real-time Sintering of Pure Nanoparticles &nbsp;&nbsp;05:55pm&nbsp;&nbsp;Cardiomo Care |&nbsp;(TBC) Continous Non-Invastive ECG Monitoring: Hardware and Software &nbsp;&nbsp;05:55pm&nbsp;CPI | Flexible Electronics for HealthTech06.10pm &nbsp;Exhibition &amp; Networking Break &nbsp;&nbsp;06:45pm&nbsp;&nbsp;Theranica Bio Electronics |&nbsp;Remote Electrical Neuromodulation: Wearable Medical DevicesYou can view the combined agenda and register free&nbsp;<a href="https://techblick-dot-yamm-track.appspot.com/2ISOs9hOMy2x8pbhQhl6KSSvgJLWIkOrG6xamhF4N_XNJc7g4hAHrTK3lmPs6viFvxTWpwv-ZckWPjtUPOAWzWbCua0Z6ORGl6JITifLNV7zXxNP6u2slSvhW_RP_2SY2c1JW8AOJI3cmvLbxsAYYVpfxKU3_2gHjvUnYyyQoFx3X0bYTw_lxzeKOy3sdQyPw0xfcZeUBrfUVgA" target="_blank">here.</a>&nbsp;

Announcing TechBlick's free-to-attend virtual conference and exhibition covering innovations in Wearable Sensors | E-Textiles | Printed Electronics & Beyond. It is a unique event with two-parallel live tracks, a live engaging exhibition floor, and 400+ attendees. See details & registration link here

Innovations: Wearable Sensors, E-Textiles, Printed Flexible Electronics

In general, silicone based conductive pastes are rare and the versions with AgCl fillers- needed for many medical wearable applications- are even rarer! <a data-attribute-index="0" data-entity-hovercard-id="urn:li:fs_miniProfile:ACoAACBPPG0BiuMqPPP9xTDFydt590kiUA2t-Us" data-entity-type="MINI_PROFILE" href="https://www.linkedin.com/in/ACoAACBPPG0BiuMqPPP9xTDFydt590kiUA2t-Us" id="isPasted" target="_blank">David Dewey</a> from <a data-attribute-index="2" data-entity-hovercard-id="urn:li:fs_miniCompany:27073286" data-entity-type="MINI_COMPANY" href="https://www.linkedin.com/company/fujikura-kasei-co-ltd/" target="_blank">FUJIKURA KASEI Co Ltd</a> unveiled this paste for the first time in June at <a data-attribute-index="4" data-entity-hovercard-id="urn:li:fs_miniCompany:71510477" data-entity-type="MINI_COMPANY" href="https://www.linkedin.com/company/techblick/" target="_blank">TechBlick</a>. The pastes can offer 1-10 E-4 ohm/sqr when cured at 150C for 30min or so on substrates such as PET or silicone sheet.&nbsp;These inks are compatible with other silicone-based (insulator, adhesive, etc) out of Fujikura&#39;s portfolio, enabling one to print complex multi-layer medical wearable devices on stretchable substrates like silicone!The short video below offers further information<iframe src="https://player.vimeo.com/video/739956599" frameborder="0" allowfullscreen="" class="fr-draggable" data-lf-yt-playback-inspected-kn9eq4roawkarlvp="true" style="width: 774px; height: 476px;"></iframe>

In general, silicone based conductive pastes are rare and the versions with AgCl fillers- needed for many medical wearable applications- are even rarer! 

Stretchable silicone-based medical devices with AgCl fillers?

In this episode, we talk about how Toyota and Stanford are collaborating to utilize AI for drifting controls and the efforts behind a team at TUM which has resulted in an autonomous race car performing at the capacity of an amateur F1 driver.&nbsp;<iframe height="200px" width="100%" frameborder="no" scrolling="no" seamless="" src="https://player.simplecast.com/3793ff13-dbcd-4d01-bee8-121b58085bba?dark=false" class="fr-draggable" data-lf-yt-playback-inspected-kn9eq4roawkarlvp="true"></iframe><hr>This podcast is sponsored by <a href="https://www2.mouser.com/" id="isPasted" rel="nofollow" target="_blank">Mouser Electronics</a>. &nbsp; &nbsp; &nbsp;<img src="https://s3-us-west-1.amazonaws.com/wevolver-project-images/froala%2F1662459182875-Mouser-sponsor-1-a.jpg" style="width: 766px;" class="fr-fic fr-dib"><hr><h3 id="isPasted">EPISODE NOTES</h3>(3:55) -&nbsp;<a href="https://www.wevolver.com/article/researchers-program-an-autonomous-vehicle-to-drift-around-obstacles-using-nonlinear-model-predictive-control-nmpc" target="_blank">Drifting Autonomous Vehicle</a>🚗(16:50) -&nbsp;<a href="https://www.wevolver.com/article/formula-1-could-see-driverless-race-cars-as-early-as-2025" target="_blank">Autonomous F1 Races By 2025</a>🏎Episode 86 was brought to you by Mouser Electronics, Farbod &amp; Daniel&rsquo;s favorite electronics distributor. Click <a href="https://resources.mouser.com/automotive/formula-e-racers-help-advance-ev-design" target="_blank">here</a> to read about the Mouser technical resource discussing Formula racing!<hr>As always, you can find these and other interesting &amp; impactful engineering articles on Wevolver.com.To learn more about this show, please visit our<a href="https://www.wevolver.com/profile/the.next.byte" target="_blank">&nbsp;shows page</a>. By following the page, you will get automatic updates by email when a new show is published. Be sure to give us a follow and review on<a href="https://podcasts.apple.com/nl/podcast/the-next-byte/id1548255861?l=en" target="_blank">&nbsp;Apple&nbsp;</a>podcasts,<a href="https://open.spotify.com/show/6lPPsRtegnivsRUEsQ09R7?si=IPMiah7xT_apJtPjqvXMlA" target="_blank">&nbsp;Spotify</a>, and most of your favorite podcast platforms!

In this episode, we talk about how Toyota and Stanford are collaborating to utilize AI for drifting controls and the efforts behind a team at TUM which has resulted in an autonomous race car performing at the capacity of an amateur F1 driver.

Podcast: The Autonomous Race & Drift Cars Of The Not So Distant Future

This article was first published on <a href="https://news.mit.edu/2022/sensor-electronic-chipless-0818" id="isPasted" rel="noopener noreferrer" target="_blank">MIT News</a>. &nbsp;<hr>Wearable sensors are ubiquitous thanks to wireless technology that enables a person&rsquo;s glucose concentrations, blood pressure, heart rate, and activity levels to be transmitted seamlessly from sensor to smartphone for further analysis.Most wireless sensors today communicate via embedded Bluetooth chips that are themselves powered by small batteries. But these conventional chips and power sources will likely be too bulky for next-generation sensors, which are taking on smaller, thinner, more flexible forms.Now MIT engineers have devised a new kind of wearable sensor that communicates wirelessly without requiring onboard chips or batteries. Their design, detailed today in the journal&nbsp;Science, opens a path toward chip-free wireless sensors.The team&rsquo;s sensor design is a form of electronic skin, or &ldquo;e-skin&rdquo; &mdash; a flexible, semiconducting film that conforms to the skin like electronic Scotch tape. The heart of the sensor is an ultrathin, high-quality film of gallium nitride, a material that is known for its piezoelectric properties, meaning that it can both produce an electrical signal in response to mechanical strain and mechanically vibrate in response to an electrical impulse.The researchers found they could harness gallium nitride&rsquo;s two-way piezoelectric properties and use the material simultaneously for both sensing and wireless communication.In their new study, the team produced pure, single-crystalline samples of gallium nitride, which they paired with a conducting layer of gold to boost any incoming or outgoing electrical signal. They showed that the device was sensitive enough to vibrate in response to a person&rsquo;s heartbeat, as well as the salt in their sweat, and that the material&rsquo;s vibrations generated an electrical signal that could be read by a nearby receiver. In this way, the device was able to wirelessly transmit sensing information, without the need for a chip or battery.&ldquo;Chips require a lot of power, but our device could make a system very light without having any chips that are power-hungry,&rdquo; says the study&rsquo;s corresponding author, Jeehwan Kim, an associate professor of mechanical engineering and of materials science and engineering, and a principal investigator in the Research Laboratory of Electronics. &ldquo;You could put it on your body like a bandage, and paired with a wireless reader on your cellphone, you could wirelessly monitor your pulse, sweat, and other biological signals.&rdquo;Kim&rsquo;s co-authors include first author and former MIT postdoc Yeongin Kim, who is now an assistant professor at the University of Cincinnati; co-corresponding author Jiyeon Han of the Korean cosmetics company AMOREPACIFIC, which helped motivate the current work; members of the Kim Research Group at MIT; and other collaborators at the University of Virginia, Washington University in St. Louis, and multiple institutions across South Korea.<h2>Pure resonance</h2>Jeehwan Kim&rsquo;s group previously developed a technique, called&nbsp;<a href="https://news.mit.edu/2018/study-flexible-electronics-made-exotic-materials-1008" target="_blank">remote epitaxy</a>, that they have employed to quickly grow and peel away ultrathin, high-quality semiconductors from wafers coated with graphene. Using this technique, they have fabricated and explored various flexible, multifunctional electronic films.In their new study, the engineers used the same technique to peel away ultrathin single-crystalline films of gallium nitride, which in its pure, defect-free form is a highly sensitive piezoelectric material.The team looked to use a pure film of gallium nitride as both a sensor and a wireless communicator of surface acoustic waves, which are essentially vibrations across the films. The patterns of these waves can indicate a person&rsquo;s heart rate, or even more subtly, the presence of certain compounds on the skin, such as salt in sweat.The researchers hypothesized that a gallium nitride-based sensor, adhered to the skin, would have its own inherent, &ldquo;resonant&rdquo; vibration or frequency that the piezoelectric material would simultaneously convert into an electrical signal, the frequency of which a wireless receiver could register. Any change to the skin&rsquo;s conditions, such as from an accelerated heart rate, would affect the sensor&rsquo;s mechanical vibrations, and the electrical signal that it automatically transmits to the recever.&nbsp;&ldquo;If there is any change in the pulse, or chemicals in sweat, or even ultraviolet exposure to skin, all of this activity can change the pattern of surface acoustic waves on the gallium nitride film,&rdquo; notes Yeongin Kim. &ldquo;And the sensitivity of our film is so high that it can detect these changes.&rdquo;<h2>Wave transmission</h2>To test their idea, the researchers produced a thin film of pure, high-quality gallium nitride and paired it with a layer of gold to boost the electrical signal. They deposited the gold in the pattern of repeating dumbbells &mdash; a lattice-like configuration that imparted some flexibility to the normally rigid metal. The gallium nitride and gold, which they consider to be a sample of electronic skin, measures just 250 nanometers thick &mdash; about 100 times thinner than the width of a human hair.They placed the new e-skin on volunteers&rsquo; wrists and necks, and used a simple antenna, held nearby, to wirelessly register the device&rsquo;s frequency without physically contacting the sensor itself. The device was able to sense and wirelessly transmit changes in the surface acoustic waves of the gallium nitride on volunteers&rsquo; skin related to their heart rate.The team also paired the device with a thin ion-sensing membrane &mdash; a material that selectively attracts a target ion, and in this case, sodium. With this enhancement, the device could sense and wireless transmit changing sodium levels as a volunteer held onto a heat pad and began to sweat.The researchers see their results as a first step toward chip-free wireless sensors, and they envision that the current device could be paired with other selective membranes to monitor other vital biomarkers.&ldquo;We showed sodium sensing, but if you change the sensing membrane, you could detect any target biomarker, such as glucose, or cortisol related to stress levels,&rdquo; says co-author and MIT postdoc Jun Min Suh. &ldquo;It&rsquo;s quite a versatile platform.&rdquo;<hr>&quot;Reprinted with permission of&nbsp;<a href="https://news.mit.edu/2022/sensor-electronic-chipless-0818" id="isPasted" rel="noopener noreferrer" target="_blank">MIT News</a>&quot;&nbsp;

The device senses and wirelessly transmits signals without bulky chips or batteries. Courtesy of the researchers

The device senses and wirelessly transmits signals related to pulse, sweat, and ultraviolet exposure, without bulky chips or batteries.

Engineers fabricate a chip-free, wireless electronic "skin"

Following the breakthrough with their first sweating artificial skin two years ago, Danqing Liu&rsquo;s multidisciplinary team hasn&rsquo;t been sitting still. Their goal: an artificial skin that sweats as naturally as possible. They have succeeded in this, as can be read in their article in Angewandte Chemie. There, they explain how they managed to be the first team in the world to be able to accurately control where, when and how much an artificial skin sweats and also where the liquid collects.&nbsp;<h2><img src="https://s3-us-west-1.amazonaws.com/wevolver-project-images/froala%2F1660531451306-csm_illustration+2_paper_a9f6306874.jpg" style="width: 766px;" class="fr-fic fr-dib">Schematic representation of the secretion of liquid by the artificial skin with different external stimuli. Photo: Danqing Liu.&nbsp;Sweating robots</h2>In the previous breakthrough by the team, it became apparent that an artificial skin that can sweat on command could have numerous practical applications. Back then, the artificial skin could secrete the fluid evenly and equally everywhere. An evenly sweating artificial skin can help cool the surface of robots. In social applications, it could help make the robot as human-like as possible, which includes sweating. Or consider special bandages that can deliver controlled drugs to human skin or to a wound surface such as a burn.These applications will only become more tangible as this new invention allows them to control where the artificial skin excretes fluid within a few micrometer. Not only that, but the researchers now control how much and for how long the fluid is released by the artificial skin, as well as where the fluid collects and when it is time to reabsorb it.The release of fluid is stimulated by UV light. By then applying voltage to the underlying electrical grid, the fluid collects in the desired places. Through clever design of the grid, this can be completely controlled and creates a very natural sweat pattern. Think about yourself: on a hot day, sweat also collects in specific places on your face. This artificial skin brings us a big step closer to imitating the natural behavior of the skin.<h2 id="isPasted">Multidisciplinary team</h2><a href="https://www.tue.nl/en/research/researchers/danqing-liu/" target="_blank">Danqing Liu</a>, assistant professor at the department of&nbsp;<a href="https://www.tue.nl/en/our-university/departments/chemical-engineering-and-chemistry/" target="_blank">Chemical Engineering &amp; Chemistry</a> and affiliated with the&nbsp;<a href="https://www.tue.nl/en/research/institutes/institute-for-complex-molecular-systems/" target="_blank">ICMS institute</a>, and het postdoc&nbsp;<a href="https://www.tue.nl/en/research/researchers/yuanyuan-zhan/" target="_blank">YuanYuan Zhan</a>&rsquo;s drive and enthusiasm are infectious to anyone who speaks to her. In Liu&rsquo;s&nbsp;<a href="https://assets.tue.nl/fileadmin/icms/Highlights%20magazine/TUE_ECHT%204391_ICMS%20magazine_juni_2022_LR.pdf#page=10" target="_blank">special lab</a>, she has gathered a unique multidisciplinary team around her. The lab also has the equipment to do electrotechnical, chemical and physical research in conjunction with industrial design, which is fairly exceptional within the university. Together, they are doing research on several promising materials based on liquid crystals, better known for LCD screens.&ldquo;It&rsquo;s so cool to see what our team can accomplish with these materials based on outside stimuli!&rdquo; Liu enthusiastically explains. &ldquo;I have a very broad technical background, so I can brainstorm with each team member. Still, everybody&rsquo;s specialisms were essential to achieving the results that we are now demonstrating.&rdquo;<iframe src="https://www.youtube.com/embed/yixbRf5RRDY?&wmode=opaque&rel=0&enablejsapi=1&origin=https://www.wevolver.com" frameborder="0" allowfullscreen="" class="fr-draggable" data-lf-yt-playback-inspected-kn9eq4roawkarlvp="true" style="width: 767px; height: 404px;"></iframe>SWEATING ARTIFICIAL SKIN.&nbsp;In the video presented here, the different phases of liquid secretion are visualized for clarification. The first secretion of the chosen liquid is stimulated with UV-light. Next, the liquid collects where the electrical grid dictates. Finally the liquid is reabsorbed through the pores in the skin, when the electricity and UV-light are switched off.<h2 id="isPasted">Unique combination of properties</h2>What makes this new iteration of artificial skin by Liu&rsquo;s team so unique is the far-reaching control that they have over the skin&rsquo;s behavior: secreting, dispersing or collecting and reabsorbing the liquid, a process which they control via free UV light and electricity. Unsurprisingly, their work is generating excitement in materials science.&ldquo;My motivation is to develop useful materials. I therefore like to start a project with a clear goal in mind. In this case, we&rsquo;re looking for a new material for a useful medical application,&rdquo; says Liu. &ldquo;And that takes time. It may seem like it&rsquo;s now going quickly, but from the first inspired idea to where we are now with this breakthrough has taken us over ten years. And we&rsquo;re not done yet.&ldquo;We started with the idea of seeing what we could do with liquid crystals in soft robotics in 3D. The focus then shifted to a 2D robot skin. We were keen to complement traditional robotics rather than compete with it. With the skin, we found that we could control the topology (mountains and valleys at the micrometer scale).&ldquo;We could use that as a coating to shake sand off of the Mars Rover&rsquo;s solar panels, for instance. Another application we&rsquo;ve worked out is alternating between sticky and non-sticky sections of the coating. By choosing which material is on the tops of the mountains and which is in the valleys, we could ensure that something is sticky or not. This could be a better method than a vacuum cup, especially for fragile or delicate parts like thin glass.&rdquo;And this brings us to Liu&rsquo;s team&#39;s current research. Together, they are working on that one dream: not simply imitating nature but helping it to evolve by adding to what is already possible. And it seems fair to conclude that they are succeeding in doing so with their unique liquid crystal materials.Yuanyuan Zhan and Danqing Liu&rsquo;s article &ldquo;<a href="https://onlinelibrary.wiley.com/doi/10.1002/anie.202207468" target="_blank">Light- and Field-Controlled Diffusion, Ejection, Flow and Collection of Liquid at a Nanoporous Liquid Crystal Membrane</a>&rdquo; appeared as a top 5%early access online article in Angewandte Chemie on July 5th,2022.<hr>This article was first published here:&nbsp;<a href="https://www.tue.nl/en/news-and-events/news-overview/27-07-2022-artificial-skin-sweats-on-command/" id="isPasted" rel="noopener noreferrer" target="_blank">https://www.tue.nl/en/news-and-events/news-overview/27-07-2022-artificial-skin-sweats-on-command/</a>

Yuanyuan Zhan with experimental results. Photo: Yuanyuan Zhan

The sophisticated artificial skin sweats where and how much the researchers want it to. This was reported in an Angewandte Chemie article by Danqing Liu and first author Yuanyuan Zhan.

Artificial skin sweats on command

<a data-attribute-index="0" data-entity-hovercard-id="urn:li:fs_miniProfile:ACoAAAFeVQkBW6afBYfUUh_JYbfniwGE2Y7yljQ" data-entity-type="MINI_PROFILE" href="https://www.linkedin.com/in/ACoAAAFeVQkBW6afBYfUUh_JYbfniwGE2Y7yljQ" id="isPasted" target="_blank">Daniel Haefliger</a> from&nbsp;<a data-attribute-index="2" data-entity-hovercard-id="urn:li:fs_miniCompany:3072981" data-entity-type="MINI_COMPANY" href="https://www.linkedin.com/company/sateco-ag/" target="_blank">Sateco Group</a> presents its non-printed technology based on multilayers of moulded conductive silicone. &nbsp; This is a unique technology. The sensor typically has a size of 10-40mm with a thickness of &gt;3mm. It can measure forces in the range of 10-100 N with a resolution of around 0.1 N. The sensor can follow the direction of applied force for some 1mm.&nbsp; Interestingly, the exact behaviour of the sensor can be designed and adjusted by controlling the spaces between the layers to suit specific application requirements.&nbsp; The technology is reliable. It is shown that at room temperature, it experiences only 5% driff when subjected to 5,000,000 cycles of 20N force. It experiences only 20% drift over full scale when subjected to 100k cycles of 20N force at much harsher conditions&nbsp;(T range: -40 - 85C | RH: 0-90%) In clip from Daniel&#39;s full presentation given at&nbsp;<a data-attribute-index="4" data-entity-hovercard-id="urn:li:fs_miniCompany:71510477" data-entity-type="MINI_COMPANY" href="https://www.linkedin.com/company/techblick/" target="_blank">TechBlick</a> in March 2022, you learn about some unique applications of this technology, including: 1- Collaborative robots: these robots work alongside or in close proximity to humans. They are not caged as are typically industrial robots. As such, they require integrated soft 3D sensors to measure proximity as well as impact. This Sateco technology is uniquely suited to this application. 2- Smart steering wheel: the moulded silicone force sensor technology can be integrated within the centre of the steering wheel.&nbsp;They provide soft touch input and still enable the airbag to be deployed. 3- Wearable devices: in this example, developed with&nbsp;<a data-attribute-index="6" data-entity-hovercard-id="urn:li:fs_miniCompany:1576237" data-entity-type="MINI_COMPANY" href="https://www.linkedin.com/company/fraunhofer-iao/" target="_blank">Fraunhofer Institute for Industrial Engineering IAO</a>, they show how the sensor can be integrated into pagbacks to measure the load that children bear when carrying their bags Join us on 12-13 OCT 2022 to learn more about this super exciting technology and how it can enable 3D soft touch and force sensors &nbsp;<a href="https://www.techblick.com/" id="isPasted" rel="noopener noreferrer" target="_blank">https://www.techblick.com/</a>Application Info in the Video<iframe src="https://player.vimeo.com/video/737506180" frameborder="0" allowfullscreen="" class="fr-draggable" data-lf-yt-playback-inspected-kn9eq4roawkarlvp="true" style="width: 727px; height: 437px;"></iframe> Technical Info in the Images Below <img src="https://s3-us-west-1.amazonaws.com/wevolver-project-images/froala%2F1659976672664-1.png" style="width: 556px;" class="fr-fic fr-dib"><img src="https://s3-us-west-1.amazonaws.com/wevolver-project-images/froala%2F1659976685332-2.png" style="width: 523px;" class="fr-fic fr-dib"><img src="https://s3-us-west-1.amazonaws.com/wevolver-project-images/froala%2F1659976696777-3.png" style="width: 550px;" class="fr-fic fr-dib"><img src="https://s3-us-west-1.amazonaws.com/wevolver-project-images/froala%2F1659976709296-4.png" style="width: 576px;" class="fr-fic fr-dib"><img src="https://s3-us-west-1.amazonaws.com/wevolver-project-images/froala%2F1659976725317-5.png" style="width: 590px;" class="fr-fic fr-dib"> Meet the Sateco team at TechBlick in Eindhoven on 11-13 OCT 2022<img src="https://s3-us-west-1.amazonaws.com/wevolver-project-images/froala%2F1659976795489-1.emil-banner-v1+%281%29.jpg" style="width: 766px;" class="fr-fic fr-dib">

Technology for creating 3D force and proximity sensors based on silicone, offering also the ability to customize shape and characteristcs.  Key application is in collaborative robots



3D-shaped mechanically-compliant soft force, pressure, or proximity sensor with ease of integration and good reliability data?

The skin of cephalopods, such as octopuses, squids and cuttlefish, is stretchy and smart, contributing to these creatures&rsquo; ability to sense and respond to their surroundings. A Penn State-led collaboration has harnessed these properties to create an artificial skin that mimics both the elasticity and the neurologic functions of cephalopod skin, with potential applications for neurorobotics, skin prosthetics, artificial organs and more.  &nbsp;Led by&nbsp;<a href="https://www.bme.psu.edu/department/directory-detail-g.aspx?q=cmy5358" target="_blank">Cunjiang Yu</a>, Dorothy Quiggle Career Development Associate Professor of Engineering Science and Mechanics and Biomedical Engineering, the team published its findings on June 1 in the&nbsp;<a href="https://www.pnas.org/doi/abs/10.1073/pnas.2204852119" target="_blank">Proceedings of the National Academy of Sciences</a>. &nbsp;Cephalopod skin is a soft organ that can endure complex deformations, such as expanding, contracting, bending and twisting. It also possesses cognitive sense-and-respond functions that enable the skin to sense light, react and camouflage its wearer. While artificial skins with either these physical or these cognitive capabilities have existed previously, according to Yu, until now none has simultaneously exhibited both qualities &mdash; the combination needed for advanced, artificially intelligent bioelectronic skin devices.  &nbsp;&ldquo;Although several artificial camouflage skin devices have been recently developed, they lack critical noncentralized neuromorphic processing and cognition capabilities, and materials with such capabilities lack robust mechanical properties,&rdquo; Yu said. &ldquo;Our recently developed soft synaptic devices have achieved brain-inspired computing and artificial nervous systems that are sensitive to touch and light that retain these neuromorphic functions when biaxially stretched.&rdquo;  &nbsp;To simultaneously achieve both smartness and stretchability, the researchers constructed synaptic transistors entirely from elastomeric materials. These rubbery semiconductors operate in a similar fashion to neural connections, exchanging critical messages for system-wide needs, impervious to physical changes in the system&rsquo;s structure. The key to creating a soft skin device with both cognitive and stretching capabilities, according to Yu, was using elastomeric rubbery materials for every component. This approach resulted in a device that can successfully exhibit and maintain neurological synaptic behaviors, such as image sensing and memorization, even when stretched, twisted and poked 30% beyond a natural resting state.  &nbsp;&ldquo;With the recent surge of smart skin devices, implementing neuromorphic functions into these devices opens the door for a future direction toward more powerful biomimetics,&rdquo; Yu said. &ldquo;This methodology for implementing cognitive functions into smart skin devices could be extrapolated into many other areas, including neuromorphic computing wearables, artificial organs, soft neurorobotics and skin prosthetics for next-generation intelligent systems.&rdquo; &nbsp;The Office of Naval Research Young Investigator Program and the National Science Foundation supported this work.&nbsp;Yu is also affiliated with the Material Research Institute and the Department of Materials Science and Engineering in the College of Earth and Mineral Sciences. &nbsp;Co-authors include Hyunseok Shim, Seonmin Jang and Shubham Patel, Penn State Department of Engineering Science and Mechanics; Anish Thukral and Bin Kan, University of Houston Department of Mechanical Engineering; Seongsik Jeong, Hyeson Jo and Hai-Jin Kim, Gyeongsang National University School of Mechanical and Aerospace Engineering; Guodan Wei, Tsinghua-Berkeley Shenzhen Institute; and Wei Lan, Lanzhou University School of Physical Science and Technology. &nbsp;

A Penn State-led collaboration developed an artificial skin made completely of rubber that mimics both the elasticity and cognitive characteristics found in octopuses and other cephalopods.    Credit: Volodymyr Ivanenko/iStock. All Rights Reserved.

Penn State-led researchers develop first artificial skin to maintain cognitive characteristics when deformed.

Rubbery camouflage skin exhibits smart and stretchy behaviors

Erbium-doped fiber amplifiers (EDFAs) are devices that can provide gain to the optical signal power in optical fibers, often used in long-distance communication fiber optic cables and fiber-based lasers. Invented in the 1980s, EDFAs are arguably one of the most important inventions, and have profoundly impacted our information society enabling signals to be routed across the Atlantic and replacing electrical repeaters.What is interesting about erbium ions in optical communications is that they can amplify light in the 1.55 mm wavelength region, which is where silica-based optical fibers have the lowest transmission loss. The unique electronic intra-4-f shell structure of erbium &ndash; and rare-earth ions in general &ndash; enables long-lived excited states when doped inside host materials such as glass. This provides an ideal gain medium for simultaneous amplification of multiple information-carrying channels, with negligible cross-talk, high temperature stability and low noise figure.Optical amplification is also used in virtually all laser applications, from fiber sensing and frequency metrology, to industrial applications including laser-machining and LiDAR. Today, optical amplifiers based on rare-earth ions have become the workhorse for optical frequency combs (2005 Nobel Prize in Physics), which are used to create the world&rsquo;s most precise atomic clocks.Achieving light amplification with rare-earth ions in photonic integrated circuit can transform integrated photonics. Already in the 1990s, Bell Laboratories were looking into erbium-doped waveguide amplifiers (EDWAs), but ultimately abandoned them because their gain and output power could not match fiber-based amplifiers, while their fabrication doesn&rsquo;t work with contemporary photonic integration manufacturing techniques.Even with the recent rise of integrated photonics, renewed efforts on EDWAs have only been able to achieve less than 1 mW output power, which is not enough for many practical applications. The problem here has been high waveguide background loss, high cooperative upconversion &ndash; a gain-limiting factor at high erbium concentration, or the long-standing challenge in achieving meter-scale waveguide lengths in compact photonic chips.Now, researchers at EPFL, led by Professor Tobias J. Kippenberg, have built an EDWA based on silicon nitride (Si3N4) photonic integrated circuits of a length up to half meter on a millimeter-scale footprint, generating a record output power of more than 145 mW and providing a small-signal net gain above 30 dB, which translates to over 1000-fold amplification in the telecommunication band in continuous operation. This performance matches the commercial, high-end EDFAs, as well as state-of-the-art heterogeneously integrated III-V semiconductor amplifiers in silicon photonics.﻿&ldquo;We overcame the longstanding challenge by applying ion implantation &ndash; a wafer-scale process that benefits from very low cooperative upconversion even at a very high ion concentration &ndash; to the ultralow-loss silicon nitrideintegrated photonic circuits,&rdquo; says Dr Yang Liu, a researcher in Kippenberg&rsquo;s lab, and the study&rsquo;s lead scientist.&ldquo;This approach allows us to achieve low loss, high erbium concentration, and a large mode-ion overlap factor in compact waveguides with meter-scale lengths, which have previously remained unsolved for decades,&rdquo; says Zheru Qiu, a PhD student and co-author of the study.﻿&ldquo;Operating with high output power and high gain is not a mere academic achievement; in fact, it is crucial to the practical operation of any amplifier, as it implies that any input signals can reach the power levels that are sufficient for long-distance high-speed data transmission and shot-noise limited detection; it also signals that high-pulse-energy femtosecond-lasers on a chip can finally become possible using this approach,&rdquo; says Kippenberg.The breakthrough signals a renaissance of rare-earth ions as viable gain media in integrated photonics, as applications of EDWAs are virtually unlimited, from optical communications and LiDAR for autonomous driving, to quantum sensing and memories for large quantum networks. It is expected to trigger follow-up studies that cover even more rare-earth ions, offering optical gain from the visible up to the mid-infrared part of the spectrum and even higher output power.<hr>ReferencesYang Liu, Zheru Qiu, Xinru Ji, Anton Lukashchuk, Jijun He, Johann Riemensberger, Martin Hafermann, Rui Ning Wang, Junqiu Liu, Carsten Ronning, and Tobias J. Kippenberg. A photonic integrated circuit based erbium-doped amplifier. Science, 17 June 2022. DOI:&nbsp;<a href="https://dx.doi.org/10.1126/science.abo2631" rel="noopener" target="_blank">10.1126/science.abo2631</a>

An erbium-doped waveguide amplifier on a photonic integrated chip. Credit: EPFL Laboratory of Photonics and Quantum Measurements/Niels Ackerman

EPFL scientists have built a compact waveguide amplifier by successfully incorporating rare-earth ions into integrated photonic circuits. The device produces record output power compared to commercial fiber amplifiers, a first in the development of integrated photonics over the last decades.

Boosting light power revolutionizes communications and autopilot

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Sensors are ubiquitous in our modern world, playing pivotal roles in numerous sectors. This article delves into their fundamental principles, diverse types, and their significant impact across industries.

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