scholarly journals A Washable Silver-Printed Textile Electrode for ECG Monitoring

2021 ◽  
Vol 6 (1) ◽  
pp. 63
Author(s):  
Abreha Bayrau Nigusse ◽  
Benny Malengier ◽  
Desalegn Alemu Mengistie ◽  
Lieva Van Langenhove
Keyword(s):  
Screen Printing ◽  
Static Condition ◽  
Polyester Fabric ◽  
Diagnostic Methods ◽  
Pet Fabric ◽  
Silver Ink ◽  
Textile Electrodes ◽  
Textile Electrode ◽  
Flat Screen ◽  
Before And After

Electrocardiography (ECG) is one of the most widely used diagnostic methods to examine heart situations. This paper focuses on the development of a textile-based electrode and the study its ECG-detecting performance. We developed silver-printed textile electrodes via a the flat-screen printing of silver ink on knitted polyester fabric. The silver-printed PET fabric stayed reasonably conductive after washing and stretching, which makes it suitable for wearable applications. Moreover, the ECG measurements in static condition showed that the signal quality collected before and after washing was comparable with standard Ag/AgCl electrodes.

DUAL-ENERGY CT WITH XENON IN PATIENTS WITH LUNG PATHOLOGY. FIRST DATA

2018 ◽  
pp. 47-51
Author(s):  
O. E. Karpov ◽  
O. Yu. Bronov ◽  
V. M. Kitaev ◽  
P. S. Vetshev ◽  
D. A. Pikhuta ◽  
...  
Keyword(s):  
Surgical Intervention ◽  
Lung Ventilation ◽  
Dual Energy ◽  
Diagnostic Methods ◽  
Dual Energy Ct ◽  
Lung Pathology ◽  
Preoperative Preparation ◽  
Before And After ◽  
Pulmonary Pathology ◽  
Postoperative Lung Function

Routine diagnostic methods have limitations in terms of predicting the ventilation function of the lungs before and after surgery. It was decided to investigate the possibilities of dual-energy CT (DECT) using xenon in assessment of lung ventilation function.Objective: to master the methods of examination of patients with pulmonary pathology, evaluate the possibility of justifying the volume of operative intervention and prediction of postoperative lung function based on the hybrid images.Materials and methods. For the study, 12 patients with different pulmonary pathologies were selected (COPD – 5, lung cancer – 4, bronchiectasis – 3). Results. It was found that the use of DECT with xenon reflects the functional state of lung tissue.Conclusions. DECT with xenon have potential for planning surgical intervention and introducing the method into modern protocols of preoperative preparation.

Surface Interface Treatment of Conveyer Belt

2011 ◽  
Vol 332-334 ◽  
pp. 295-298
Author(s):  
Jia Huang Hu ◽  
Chiu Chun Lai ◽  
Wen Hao Hsing ◽  
Yi Kui Wang
Keyword(s):  
Adhesion Strength ◽  
Oxygen Plasma ◽  
High Strength ◽  
Far Infrared ◽  
Conveyor Belt ◽  
Polyester Fabric ◽  
Rubber Layer ◽  
Pet Fabric ◽  
Pre Treatment ◽  
Interface Treatment

This Research Is to Study the High Strength Polyester Fabric Pre-treatment by Oxygen Plasma and Far-infrared, in the Rfl Chemical Solid Composition and Methylenediphenylisocyanate Concentration of 4% for Adding. Analysis Adhesion Strength between Fabric to Fabric and Fabric to Rubber of the Conveyor Belt, and the Effect of Pet Fabric Mechanical Properties. from the Result, the Best Treatment Condition Is Oxygen Plasma Treated 1min 120w and Add 4% Methylenediphenylisocyanate(mdi). in the Adhesion Strength of Fabric and Fabric Layer Compared with the Untreated Has Raised up to 21.5kgf (25.0%), and Fabric and Rubber Layer Has Raised up to 23.7kgf (55.9%). Heating 20 Seconds, after Stop 10 Seconds and then Heat 20 Seconds and Add 4% Methylenediphenylisocyanate(mdi) Fabric-fabric Adhesion Strength Is 13.4 Kgf, Fabric-rubber Adhesion Strength Is 15.8 Kgf, Fabric-fabric and Fabric-rubber Adhesion Strength that Improve 24.1%, 43.6%.

Study on the Properties of Polyester Fabric by Ni/Co/Fe Multilayer Electroless Plating Technology

2012 ◽  
Vol 602-604 ◽  
pp. 1729-1732
Author(s):  
Jian Chao Zhan
Keyword(s):  
Crystal Structure ◽  
Surface Morphology ◽  
Microwave Absorption ◽  
Electroless Plating ◽  
Surface Resistance ◽  
Polyester Fabric ◽  
Pet Fabric ◽  
Element Ratios ◽  
Absorption Performance ◽  
Microwave Absorption Performance

The Ni/Co/Fe plated fabric was obtained by electroless plating. The surface morphology, crystal structure, composition,surface resistance and microwave absorption performance of Ni/Co/Fe plated PET fabric were investigated. The results show that the composites possess effective microwave absorption. The characteristics of microwave absorption can be controlled by adjusting element ratios in composition. This kind of composite has great potential and investigation value in microwave absorbing fields.

scholarly journals Development of Continuous Roll-to-Roll Screen Printing System Using a Flat Screen

2016 ◽  
Vol 25 (3) ◽  
pp. 217-223 ◽  
Author(s):  
Ga Eul Kim ◽  
Yong Ho Jeon ◽  
Moon Gu Lee ◽  
Min Sung Hong ◽  
Taik Min Lee ◽  
...  
Keyword(s):  
Screen Printing ◽  
Roll To Roll ◽  
Flat Screen ◽  
Printing System

scholarly journals Influence of the surface finishing on ultrasound velocity in wood

2008 ◽  
Vol 56 (2) ◽  
pp. 211-216
Author(s):  
Tomáš Špaček ◽  
Mária Kotlínová ◽  
Michal Kloiber ◽  
Josef Polášek
Keyword(s):  
Ultrasound Velocity ◽  
Diagnostic Methods ◽  
Surface Finishing ◽  
Detector Surface ◽  
Before And After ◽  
Non Destructive ◽  
Ultrasound Testing

Non-destructive diagnostic methods are very useful for monumental buildings. This paper deals with one of these technique, namely with ultrasound testing and influence of surface finishing on ultrasound velocity measured by means of device the Arborsonic Decay Detector. Surface finishing (Primalex – thick synthetic film of the surface finishing, Luxol – Extra – thin synthetic film of the surface finishing and Impranal Profi SL – thick acryl film the surface finishing) were selected and tested in this research. The transmittion time was measured and velocity was converted from it. This was compared before and after application of surface finishing.

Screen Printing Fine Pitch Stretchable Silver Inks onto a Flexible Substrate for Wearable Applications

2018 ◽  
Vol 2018 (1) ◽  
pp. 000665-000671
Author(s):  
Jianbiao Pan ◽  
Malcolm Keif ◽  
Joshua Ledgerwood ◽  
Xiaoying Rong ◽  
Xuan Wang
Keyword(s):  
Sheet Resistance ◽  
Flexible Electronics ◽  
Screen Printing ◽  
Flexible Substrate ◽  
Thermoplastic Polyurethane ◽  
Organic Substrate ◽  
Printing Process ◽  
Silver Ink ◽  
Fine Pitch

Abstract The lightweight and bendable features of printed flexible electronics are increasingly attractive. Currently stretchable silver inks are formulated for wide traces, typically larger than 2 mm. To attach ultra-thin silicon chips that have fine pitch onto printed organic substrate, it is necessary to print fine trace width/space that matches the pitch of the chips, which may be less than 200 microns. This paper presents the development and optimization of the screen printing process for printing stretchable silver ink onto stretchable thermoplastic polyurethane (TPU) substrate. A test vehicle was designed including 50 μm/5 mm (line width/line length) to 350 μm/35 mm lines (at 4 biases). The stretchable ink selected was DuPont PE 873 and Dupont's PE 5025 ink (non-stretchable conductive flake silver) was used as a “control” to baseline the printing process. The substrate used was Bemis TPU ST604. The experiment was done on a DEK Horizon 03i printer. A DEK squeegee 200 (Blue) and a DEK 265 flood bar (200 mm) were used. A 2-level factorial design with three replicates was selected to investigate the effect of process parameters on the quality of prints. The quality of the prints is characterized by 1) resistance of traces, 2) sheet resistance, 3) z-axis height, and 4) trace width/spacing. We observed significant noise in the z-axis printed silver ink height measured by profilometry and concluded z-axis height is not a good response variable for characterizing screen printing stretchable silver ink onto TPU substrate, mainly due to high roughness of the TPU substrate. We proposed calculated sheet resistance based on the measured resistance value, trace width, and trace length, which can replace trace height measurements on rough profile substrates. We found that squeegee pressure and emulsion thickness have statistically significant effects on calculated sheet resistance of print traces while print speed does not have statistically significant effects. In our experiment setting levels, the lower the squeegee pressure, the lower the calculated sheet resistance that is achieved. The emulsion with higher emulsion over mesh (EOM) is better than the emulsion with lower EOM since it can achieve lower sheet resistance. After optimizing the screen printing process, we were able to print 100 μm (4 mils) trace width and spacing with high consistency.

Screen Printing Fine Pitch Stretchable Silver Inks onto a Flexible Substrate for Wearable Applications

2018 ◽  
Vol 15 (4) ◽  
pp. 179-186
Author(s):  
Jianbiao Pan ◽  
Malcolm Keif ◽  
Joshua Ledgerwood ◽  
Xiaoying Rong ◽  
Xuan Wang
Keyword(s):  
Sheet Resistance ◽  
Screen Printing ◽  
Flexible Substrate ◽  
Thermoplastic Polyurethane ◽  
Line Length ◽  
Printing Process ◽  
Silver Ink ◽  
Fine Pitch ◽  
Measured Resistance ◽  
High Consistency

Abstract This article presents the development and optimization of the screen printing process for printing stretchable silver ink onto a stretchable thermoplastic polyurethane substrate. A test vehicle was designed including 50 μm/5 mm (line width/line length) to 350 μm/35 mm lines (at four biases). A two-level factorial design with three replicates was selected to investigate the effect of process parameters on the quality of prints. We proposed calculated sheet resistance based on the measured resistance value, trace width, and trace length, which can replace trace height measurements on rough profile substrates. We found that squeegee pressure and emulsion thickness have statistically significant effects on calculated sheet resistance of print traces, whereas print speed does not have statistically significant effects. In our experiment setting levels, the lower the squeegee pressure, the lower the calculated sheet resistance that is achieved. The emulsion with higher emulsion over mesh (EOM) is better than the emulsion with lower EOM because it can achieve lower sheet resistance. After optimizing the screen printing process, we were able to print 100 μm (4 mils) trace width and spacing with high consistency.

scholarly journals The Efficacy of Polymer Coatings for the Protection of Electroless Copper Plated Polyester Fabric

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1277 ◽  
Author(s):  
Alenka Ojstršek ◽  
Natalija Virant ◽  
Daryl Fox ◽  
Latha Krishnan ◽  
Andrew Cobley
Keyword(s):  
Screen Printing ◽  
Base Material ◽  
Polyester Fabric ◽  
Polymer Coatings ◽  
Mechanical Characterisation ◽  
Polyurethane Resin ◽  
Colour Changes ◽  
Acrylate Resin ◽  
Photo Stability

The selective metallisation of textiles is becoming a very important process in the development of electronic or e-textiles. This study investigated the efficacy of polymer coatings for the protection of copper (Cu) conductive tracks electroless plated on polyester (PES) fabric against laundering and rubbing, without essentially affecting the physical-mechanical and optical properties of the base material. After the electroless deposition of a consistent layer of Cu onto PES, four polymers were applied individually by screen-printing or padding. The physical-mechanical characterisation of coated textiles revealed that polyurethane resin (PUR) and modified acrylate resin (AR) had little effect on the air permeability, tensile strength and breaking tenacity of the PES, as compared to silicone elastomer polydimethylsiloxane (PDMS) and epoxy resin (ER). On the other hand, PUR and PDMS had higher abrasion resistance and photo-stability under prolonged UV irradiation, as compared to AR and ER. In addition, freshly Cu plated samples were coated with polymers, washed up to 30 cycles and characterised by measuring their electrical resistivity, determination of colour changes and the examination of the surface morphology. Based on these results, PUR presented the most suitable protection of Cu tracks on PES, with the lowest impact on physical-mechanical properties. ER is not recommended to be used for protection of Cu tracks on fabrics, due to its rigidity, low photo-stability, washing and wear durability.

Intermediate results 2016 of a search study of translational diagnostic methods Mitochondrial dysfunction in patients with chronic myocardial ischemia and/or head Brain

2017 ◽  
Author(s):  
Виктория Киреева ◽  
Viktoriya Kireeva ◽  
Ю. Усольцев ◽  
Yu. Usolcev ◽  
Ж. Капустенская ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Heart Disease ◽  
Cerebral Ischemia ◽  
Cell Damage ◽  
Diagnostic Methods ◽  
Cellular Damage ◽  
Rank Test ◽  
Clinical Test ◽  
Chronic Cerebral Ischemia ◽  
Before And After

Purpose of the study. To rate prognostic properties of changes in mitochondrial DNA concentration in the blood plasma of patients with chronic cerebral ischemia and ischemic heart disease in relation to the disease and the effectiveness of the therapy. Materials and methods. The study involved patients suffering from coronary heart disease (CHD) and chronic cerebral ischemia (CCI) with stable and unstable atherosclerotic plaques, who have signed informed consent to the data processing within the framework of scientific research. The patients were admitted to the hospital for examination and treatment of CHD and CCI in Cardiology and Neurology Unit of the Hospital of ISC SB RAS. The subjects underwent laboratory and instrumental examination and analysis of the level of free circulating serum mitochondrial DNA by real-time PCR (copies/ml). The examination results considered as satisfactory were compared with the mtDNA levels before and after the treatment. Results. The average value of the mtDNA levels before and after the treatment in patients of neurological and cardiological profile were significantly different: 1 093 686 copies/ml vs 418 046 copies/ml, respectively (p = 0.02). Unlike women, men mtDNA levels statistically significantly (p = 0.03) decreased after the treatment. We revealed statistically significant differences in mtDNA level indicators before and after the treatment, depending on the definition of the series (p = 0.0010) for rank test Kruskal – Wallis test. The results of the proposed research will help to identify prognostic factors of destabilization of cell damage and plaques in endothelial dysfunction, atherosclerosis and its complications, to conduct clinical test of the method for predicting and diagnostics of cellular damage in chronic ischemia on a background of atherosclerosis.

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