scholarly journals Optomechanics based soft artificial skin

2021 ◽  
Author(s):  
Abhijit Chandra Roy ◽  
Navin Kumar ◽  
Shreyas B S ◽  
Ananya Gupta ◽  
Aloke Kumar ◽  
...  
Keyword(s):  
Research Effort ◽  
Cost Effective ◽  
Artificial Skin ◽  
Large Area ◽  
Long Term Stability ◽  
Large Numbers ◽  
Fundamental Understanding ◽  
Extreme Sensitivity ◽  
Consistent Performance

Abstract Soft artificial skin capable of sensing touch, pressure and bending similar to soft human skin is important in many modern-day applications including socially interactive robotics, modern healthcare, augmented reality, etc. However, most of the research effort on soft artificial skin are confined to the lab-scale demonstration. We have demonstrated how a fundamental understanding of the contact mechanics of soft material and a specially constructed soft optical waveguide let us develop a highly efficient, resilient, and large-area soft artificial skin for futuristic applications. The soft artificial skin capable of detect touch, load and bending shows extreme sensitivity (up to \({150 \text{k}\text{P}\text{a}}^{-1}\)) to touch, and load, which is 750 times higher than earlier work. The soft-a-skin shows excellent long-term stability i.e. it shows consistent performance up to almost a year. In addition, we describe a 3D printing process capable of producing large areas, large numbers yet cost-effective soft artificial skin. We have shown the functioning of the soft-a-skin in various means.

scholarly journals An approach for long-term, multi-probe Neuropixels recordings in unrestrained rats

eLife ◽  
2020 ◽  
Vol 9 ◽  
Author(s):  
Thomas Zhihao Luo ◽  
Adrian Gopnik Bondy ◽  
Diksha Gupta ◽  
Verity Alexander Elliott ◽  
Charles D Kopec ◽  
...  
Keyword(s):  
Cost Effective ◽  
New Approach ◽  
Neural Recordings ◽  
Chronic Recording ◽  
Long Term Stability ◽  
Multiple Cycles ◽  
Single Unit Recordings ◽  
Freely Moving ◽  
High Yields

The use of Neuropixels probes for chronic neural recordings is in its infancy and initial studies leave questions about long-term stability and probe reusability unaddressed. Here, we demonstrate a new approach for chronic Neuropixels recordings over a period of months in freely moving rats. Our approach allows multiple probes per rat and multiple cycles of probe reuse. We found that hundreds of units could be recorded for multiple months, but that yields depended systematically on anatomical position. Explanted probes displayed a small increase in noise compared to unimplanted probes, but this was insufficient to impair future single-unit recordings. We conclude that cost-effective, multi-region, and multi-probe Neuropixels recordings can be carried out with high yields over multiple months in rats or other similarly sized animals. Our methods and observations may facilitate the standardization of chronic recording from Neuropixels probes in freely moving animals.

Thermal treatment of plutonium contaminated material (PCM) waste

MRS Advances ◽  
2017 ◽  
Vol 2 (13) ◽  
pp. 735-740
Author(s):  
Luke Boast ◽  
M.C. Stennett ◽  
Neil C. Hyatt
Keyword(s):  
Thermal Treatment ◽  
Long Term Stability ◽  
Treatment Processes ◽  
Matrix Interactions ◽  
Fundamental Understanding ◽  
Treatment Technologies ◽  
Key Drivers ◽  
The Impact

ABSTRACTKey drivers for the application of thermal treatment processes include the reduced volume, improved passive safety, and superior long term stability of the vitrified wasteform products. These advantages have led to a renewed interest in thermally treating various UK ILW streams. To support the increased investment in thermal treatment technologies a fundamental understanding of the processes and the impact of waste inventory needs to be established. The research described in this report aims to provide the evidence necessary to support a major investment in thermal treatment of Plutonium Contaminated Materials (PCM). The report describes the use of laboratory scale waste simulants to develop an understanding of the waste and matrix interactions during thermal treatment of PCM waste. The report includes the thermal treatment process and characterization of the vitrified product.

Surface Processes Limiting the High Rate Deposition of High Electronic Quality a-Si

1991 ◽  
Vol 219 ◽  
Author(s):  
S. Veprek ◽  
O. Anibacher ◽  
M. Riickschloβ
Keyword(s):  
Amorphous Silicon ◽  
High Rate ◽  
Surface Processes ◽  
Large Area ◽  
Plasma Parameters ◽  
Long Term Stability ◽  
Scaling Parameters ◽  
Gap States ◽  
Rate Limiting

ABSTRACTAmorphous silicon of a high electronic quality with Odatk 10-10, σPh ≈ 1·10-4 (Ωcm)-3 and density of gap states of about 0.3 to 2.1016 eV-1cm-3 is deposited at rates up to 17 Å/sec. The rate limiting steps are identified and their control via the plasma parameters is explained. This allows one to establish the fundamental scaling parameters for large-area high-rate deposition of a-Si. Long term stability of the films in terms of postoxidation and photode-gradation is briefly addressed.

An instantly usable paper-based screen-printed solid-state KCl/Ag/AgCl reference electrode with long-term stability

The Analyst ◽  
2015 ◽  
Vol 140 (19) ◽  
pp. 6481-6484 ◽  
Author(s):  
Isao Shitanda ◽  
Masato Komoda ◽  
Yoshinao Hoshi ◽  
Masayuki Itagaki
Keyword(s):  
Solid State ◽  
Reference Electrode ◽  
Cost Effective ◽  
Term Stability ◽  
Long Term Stability ◽  
Screen Printed

An instantly usable screen-printed paper-based Ag/AgCl electrode was fabricated for use as a cost-effective disposable reference electrode.

scholarly journals Triple-Mesoscopic Carbon Perovskite Solar Cells: Materials, Processing and Applications

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 386
Author(s):  
Simone M. P. Meroni ◽  
Carys Worsley ◽  
Dimitrios Raptis ◽  
Trystan M. Watson
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Low Cost ◽  
Perovskite Solar Cells ◽  
Future Research ◽  
Large Area ◽  
Long Term Stability ◽  
Comparable Performance ◽  
Indoor And Outdoor

Perovskite solar cells (PSCs) have already achieved comparable performance to industrially established silicon technologies. However, high performance and stability must be also be achieved at large area and low cost to be truly commercially viable. The fully printable triple-mesoscopic carbon perovskite solar cell (mCPSC) has demonstrated unprecedented stability and can be produced at low capital cost with inexpensive materials. These devices are inherently scalable, and large-area modules have already been fabricated using low-cost screen printing. As a uniquely stable, scalable and low-cost architecture, mCPSC research has advanced significantly in recent years. This review provides a detailed overview of advancements in the materials and processing of each individual stack layer as well as in-depth coverage of work on perovskite formulations, with the view of highlighting potential areas for future research. Long term stability studies will also be discussed, to emphasise the impressive achievements of mCPSCs for both indoor and outdoor applications.

scholarly journals Multi-Odor Discrimination by Rat Sniffing for Potential Monitoring of Lung Cancer and Diabetes

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3696
Author(s):  
Yunkwang Oh ◽  
Ohseok Kwon ◽  
Sun-Seek Min ◽  
Yong-Beom Shin ◽  
Min-Kyu Oh ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Cost Effective ◽  
Performance Criterion ◽  
Odor Discrimination ◽  
Long Term Stability ◽  
Quantitative Measurements ◽  
Behavior Response ◽  
Odor Monitoring ◽  
Sensing Performance

The discrimination learning of multiple odors, in which multi-odor can be associated with different responses, is important for responding quickly and accurately to changes in the external environment. However, very few studies have been done on multi-odor discrimination by animal sniffing. Herein, we report a novel multi-odor discrimination system by detection rats based on the combination of 2-Choice and Go/No-Go (GNG) tasks into a single paradigm, in which the Go response of GNG was replaced by 2-Choice, for detection of toluene and acetone, which are odor indicators of lung cancer and diabetes, respectively. Three of six trained rats reached performance criterion, in 12 consecutive successful tests within a given set or over 12 sets with a success rate of over 90%. Through a total of 1300 tests, the trained animals (N = 3) showed multi-odor sensing performance with 88% accuracy, 87% sensitivity and 90% specificity. In addition, a dependence of behavior response time on odor concentrations under given concentration conditions was observed, suggesting that the system could be used for quantitative measurements. Furthermore, the animals’ multi-odor sensing performance has lasted for 45 days, indicating long-term stability of the learned multi-odor discrimination. These findings demonstrate that multi-odor discrimination can be achieved by rat sniffing, potentially providing insight into the rapid, accurate and cost-effective multi-odor monitoring in the lung cancer and diabetes.

scholarly journals An approach for long-term, multi-probe Neuropixels recordings in unrestrained rats

2020 ◽  
Author(s):  
Thomas Zhihao Luo ◽  
Adrian G. Bondy ◽  
Diksha Gupta ◽  
Verity A. Elliott ◽  
Charles D. Kopec ◽  
...  
Keyword(s):  
Cost Effective ◽  
New Approach ◽  
Neural Recordings ◽  
Chronic Recording ◽  
Long Term Stability ◽  
Multiple Cycles ◽  
Single Unit Recordings ◽  
Freely Moving ◽  
High Yields

AbstractThe use of Neuropixels probes for chronic neural recordings is in its infancy and initial studies leave questions about long-term stability and probe reusability unaddressed. Here we demonstrate a new approach for chronic Neuropixels recordings over a period of months in freely moving rats. Our approach allows multiple probes per rat and multiple cycles of probe reuse. We found that hundreds of units could be recorded for multiple months, but that yields depended systematically on anatomical position. Explanted probes displayed a small increase in noise compared to unimplanted probes, but this was insufficient to impair future single-unit recordings. We conclude that cost-effective, multi-region, and multi-probe Neuropixels recordings can be carried out with high yields over multiple months in rats or other similarly sized animals. Our methods and observations may facilitate the standardization of chronic recording from Neuropixels probes in freely moving animals.

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