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https://www.readbyqxmd.com/read/28228002/custom-shaped-organic-photovoltaic-modules-freedom-of-design-by-printing
#1
M Välimäki, E Jansson, P Korhonen, A Peltoniemi, S Rousu
Freedom of design that was introduced as organic photovoltaic (OPV) modules were fabricated by printing. As proof-of-concept, we show OPV leaf fabrication in A5 size using gravure and rotary screen printing processes for the main active layers of the OPV structure. These printing methods allow direct printing of any kind of arbitrary, two-dimensional shapes including patterning of the electric contacts thus post-patterning stages are not needed. Fabrication of custom-shaped OPV modules requires detailed information about the technical boundaries set by the manufacturing process and materials which in turn influence the layout design and R2R upscaling...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28227950/designing-and-testing-a-wearable-wireless-fnirs-patch
#2
Mohammadreza Abtahi, Gozde Cay, Manob Jyoti Saikia, Kunal Mankodiya, Mohammadreza Abtahi, Gozde Cay, Manob Jyoti Saikia, Kunal Mankodiya, Manob Jyoti Saikia, Kunal Mankodiya, Gozde Cay, Mohammadreza Abtahi
Optical brain monitoring using near infrared (NIR) light has got a lot of attention in order to study the complexity of the brain due to several advantages as oppose to other methods such as EEG, fMRI and PET. There are a few commercially available functional NIR spectroscopy (fNIRS) brain monitoring systems, but they are still non-wearable and pose difficulties in scanning the brain while the participants are in motion. In this work, we present our endeavors to design and test a low-cost, wireless fNIRS patch using NIR light sources at wavelengths of 770 and 830nm, photodetectors and a microcontroller to trigger the light sources, read photodetector's output and transfer data wirelessly (via Bluetooth) to a smart-phone...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227645/myoelectric-intuitive-control-and-transcutaneous-electrical-stimulation-of-the-forearm-for-vibrotactile-sensation-feedback-applied-to-a-3d-printed-prosthetic-hand
#3
Enrique I Germany, Esteban J Pino, Pablo E Aqueveque, Enrique I Germany, Esteban J Pino, Pablo E Aqueveque, Enrique I Germany, Pablo E Aqueveque, Esteban J Pino
This paper presents the development of a myoelectric prosthetic hand based on a 3D printed model. A myoelectric control strategy based on artificial neural networks is implemented on a microcontroller for online position estimation. Position estimation performance achieves a correlation index of 0.78. Also a study involving transcutaneous electrical stimulation was performed to provide tactile feedback. A series of stimulations with controlled parameters were tested on five able-body subjects. A single channel stimulator was used, positioning the electrodes 8 cm on the wrist over the ulnar and median nerve...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227619/characterizing-graphene-modified-electrodes-for-interfacing-with-arduino%C3%A2-based-devices
#4
Farrah Aida Arris, Mohamad Hafiz Ithnin, Wan Wardatul Amani Wan Salim, Farrah Aida Arris, Mohamad Hafiz Ithnin, Wan Wardatul Amani Wan Salim, Mohamad Hafiz Ithnin, Wan Wardatul Amani Wan Salim, Farrah Aida Arris
Portable low-cost platform and sensing systems for identification and quantitative measurement are in high demand for various environmental monitoring applications, especially in field work. Quantifying parameters in the field requires both minimal sample handling and a device capable of performing measurements with high sensitivity and stability. Furthermore, the one-device-fits-all concept is useful for continuous monitoring of multiple parameters. Miniaturization of devices can be achieved by introducing graphene as part of the transducer in an electrochemical sensor...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227586/inductive-power-transmission-to-millimeter-sized-biomedical-implants-using-printed-spiral-coils
#5
Ahmed Ibrahim, Mehdi Kiani, Ahmed Ibrahim, Mehdi Kiani, Ahmed Ibrahim, Mehdi Kiani
The operation frequency (f) has been a key parameter in optimizing wireless power transmission links for biomedical implants with millimeter (mm) dimensions. This paper studies the feasibility of using printed spiral coils (PSCs) for powering mm-sized implants with high power transmission efficiency (PTE) at different fps. Compared to wire-wound coils (WWCs), using a PSC in the implant side allows batch fabrication on rigid or flexible substrates, which can also be used as a platform for integrating implant components...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227479/a-low-cost-3-d-printed-stethoscope-connected-to-a-smartphone
#6
Carlos Aguilera-Astudillo, Marx Chavez-Campos, Alan Gonzalez-Suarez, Jose L Garcia-Cordero, Carlos Aguilera-Astudillo, Marx Chavez-Campos, Alan Gonzalez-Suarez, Jose L Garcia-Cordero, Jose L Garcia-Cordero, Alan Gonzalez-Suarez, Marx Chavez-Campos
We demonstrate the fabrication of a digital stethoscope using a 3D printer and commercial off-the-shelf electronics. A chestpiece consists of an electret microphone embedded into the drum of a 3D printed chestpiece. An electronic dongle amplifies the signal from the microphone and reduces any external noise. It also adjusts the signal to the voltages accepted by the smartphones headset jack. A graphical user interface programmed in Android displays the signals processed by the dongle. The application also saves the processed signal and sends it to a physician...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227435/gelatin-methacrylamide-hydrogel-with-graphene-nanoplatelets-for-neural-cell-laden-3d-bioprinting
#7
Wei Zhu, Brent T Harris, Lijie Grace Zhang, Wei Zhu, Brent T Harris, Lijie Grace Zhang, Wei Zhu, Brent T Harris, Lijie Grace Zhang
Nervous system is extremely complex which leads to rare regrowth of nerves once injury or disease occurs. Advanced 3D bioprinting strategy, which could simultaneously deposit biocompatible materials, cells and supporting components in a layer-by-layer manner, may be a promising solution to address neural damages. Here we presented a printable nano-bioink composed of gelatin methacrylamide (GelMA), neural stem cells, and bioactive graphene nanoplatelets to target nerve tissue regeneration in the assist of stereolithography based 3D bioprinting technique...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227430/a-method-for-coronary-bifurcation-centerline-reconstruction-from-angiographic-images-based-on-focalization-optimization
#8
E Montin, S Migliori, C Chiastra, C Credi, R Fedele, C Aurigemma, M Levi, F Burzotta, F Migliavacca, L T Mainardi, E Montin, S Migliori, C Chiastra, C Credi, R Fedele, C Aurigemma, M Levi, F Burzotta, F Migliavacca, L T Mainardi, L T Mainardi, C Chiastra, E Montin, S Migliori, F Burzotta, C Credi, R Fedele, M Levi, C Aurigemma, F Migliavacca
A method for the reconstruction of a vessel centerline from angiographic images is outlined in this work. A typical coronary artery segment with bifurcations was emulated with a 3D printed static phantom and several angiograms were acquired at various angular positions on the C-Arm. The effectiveness of the reconstruction turned out to be largely influenced by the intrinsic parameters of the angiographic system, particularly the homogeneous coordinates system scaling factor λ. Therefore, recourse was made to a heuristic optimization method to estimate the optimal value of λ for each view...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227188/conformai-electronics-for-longitudinal-bio-sensing-in-at-home-assistive-and-rehabilitative-devices
#9
John C Batchelor, Stephen G Yeates, Alexander J Casson, John C Batchelor, Stephen G Yeates, Alexander J Casson, Stephen G Yeates, John C Batchelor, Alexander J Casson
Wearable electronics are revolutionizing personalized and preventative healthcare by allowing the easy, unobtrusive, and long term monitoring of a range of body parameters. Conformal electronics which attach directly to the skin in a very robust and long term manner are envisioned as the next generation of highly portable miniaturized computing devices, beyond wearables. In this paper we overview the state-of-the-art in conformal electronics created using silver nanoparticle inkjet printed techniques for home assistive and rehabilitative devices...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226932/novel-refractive-index-biosensing-of-microcontact-printed-molecules-on-lithium-niobate
#10
Nikhil Bhalla, Shivani Sathish, Amy Q Shen, Nikhil Bhalla, Shivani Sathish, Amy Q Shen, Shivani Sathish, Amy Q Shen, Nikhil Bhalla
This work demonstrates, for the first time, the use of lithium niobate as a biosensor that detects local refractive index changes triggered by the presence of biomolecules on its surface. The sensitivity of the sensor was found to be 242±16 nm/RIU. As a case study, we immobilized proteins (IgG antibodies) using micro-contact printing to demonstrate sensing capabilities of the device. The validated proof of concept lays a foundation for developing lithium niobate based novel optical biosensors.
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226906/a-new-crank-arm-based-load-cell-with-built-in-conditioning-circuit-and-strain-gages-to-measure-the-components-of-the-force-applied-by-a-cyclist
#11
Andre V Pigatto, Karina O A Moura, Gabriela W Favieiro, Alexandre Balbinot, Andre V Pigatto, Karina O A Moura, Gabriela W Favieiro, Alexandre Balbinot, Karina O A Moura, Gabriela W Favieiro, Alexandre Balbinot, Andre V Pigatto
This report describes the development of a force platform based on instrumented load cells with built-in conditioning circuit and strain gages to measure and acquire the components of the force that is applied to the bike crank arm during pedaling in real conditions, and save them on a SD Card. To accomplish that, a complete new crank arm 3D solid model was developed in the SolidWorks, with dimensions equivalent to a commercial crank set and compatible with a conventional road bike, but with a compartment to support all the electronics necessary to measure 3 components of the force applied to the pedal during pedaling...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226901/investigations-on-different-epoxies-for-electrical-insulation-of-microflex-structures
#12
P Cvancara, S Lauser, L Rudmann, T Stieglitz, P Cvancara, S Lauser, L Rudmann, T Stieglitz, P Cvancara, S Lauser, T Stieglitz, L Rudmann
The microflex interconnection (MFI) technique is often used to connect electrically and mechanically thin film ribbons or electrodes with a solid substrate like screen printed ceramics. For stabilization reasons epoxy is used to fix the MFI structure. As epoxy tends to form cracks when surrounded by water or electrolytes we are eager to find an epoxy which provides sufficient insulation between the single channels of the MFI structure also in a moist surrounding. Therefore we designed a device to investigate the insulating properties of different epoxies (Uhu Plus Endfest 300, Epo-Tek 353ND and 353ND-T) immersed in saline solution...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226885/a-graphene-oxide-ph-sensor-for-wound-monitoring
#13
B Melai, P Salvo, N Calisi, L Moni, A Bonini, C Paoletti, T Lomonaco, V Mollica, R Fuoco, F Di Francesco, B Melai, P Salvo, N Calisi, L Moni, A Bonini, C Paoletti, T Lomonaco, V Mollica, R Fuoco, F Di Francesco, F Di Francesco, L Moni, P Salvo, T Lomonaco, R Fuoco, V Mollica, C Paoletti, A Bonini, N Calisi, B Melai
This article describes the fabrication and characterization of a pH sensor for monitoring the wound status. The pH sensitive layer consists of a graphene oxide (GO) layer obtained by drop-casting 5 μΐ of GO dispersion onto the working electrode of a screen-printed substrate. Sensitivity was 31.8 mV/pH with an accuracy of 0.3 unit of pH. Open-circuit potentiometry was carried out to measure pH in an exudate sample. The GO pH sensor proved to be reliable as the comparison with results obtained from a standard glass electrode pH-meter showed negligible differences (<; 0...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226721/overcoming-spatio-temporal-limitations-using-dynamically-scaled-in-vitro-pc-mri-a-flow-field-comparison-to-true-scale-computer-simulations-of-idealized-stented-and-patient-specific-left-main-bifurcations
#14
Susann Beier, John Ormiston, Mark Webster, John Cater, Stuart Norris, Pau Medrano-Gracia, Alistair Young, Kathleen Gilbert, Brett Cowan, Susann Beier, John Ormiston, Mark Webster, John Cater, Stuart Norris, Pau Medrano-Gracia, Alistair Young, Kathleen Gilbert, Brett Cowan, Stuart Norris, Brett Cowan, Pau Medrano-Gracia, Kathleen Gilbert, Mark Webster, Alistair Young, Susann Beier, John Cater, John Ormiston
The majority of patients with angina or heart failure have coronary artery disease. Left main bifurcations are particularly susceptible to pathological narrowing. Flow is a major factor of atheroma development, but limitations in imaging technology such as spatio-temporal resolution, signal-to-noise ratio (SNRv), and imaging artefacts prevent in vivo investigations. Computational fluid dynamics (CFD) modelling is a common numerical approach to study flow, but it requires a cautious and rigorous application for meaningful results...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226711/computer-aided-planning-and-reconstruction-of-cranial-3d-implants
#15
Markus Gall, Xing Li, Xiaojun Chen, Dieter Schmalstieg, Jan Egger, Markus Gall, Xing Li, Xiaojun Chen, Dieter Schmalstieg, Jan Egger, Jan Egger, Markus Gall, Xing Li, Dieter Schmalstieg, Xiaojun Chen
In this contribution, a prototype for semiautomatic computer-aided planning and reconstruction of cranial 3D Implants is presented. The software prototype guides the user through the workflow, beginning with loading and mirroring the patient's head to obtain an initial curvature of the cranial implant. However, naïve mirroring is not sufficient for an implant, because human heads are in general too asymmetric. Thus, the user can perform Laplacian smoothing, followed by Delaunay triangulation, for generating an aesthetic looking and well-fitting implant...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226567/an-effective-3-fingered-augmenting-exoskeleton-for-the-human-hand
#16
C J Gearhart, B Varone, M H Stella, B F BuSha, C J Gearhart, B Varone, M H Stella, B F BuSha, M H Stella, B F BuSha, B Varone, C J Gearhart
Every year, thousands of Americans suffer from pathological and traumatic events that result in loss of dexterity and strength of the hand. Although many supportive devices have been designed to restore functional hand movement, most are very complex and expensive. The goal of this project was to design and implement a cost-effective, electrically powered exoskeleton for the human hand that could improve grasping strength. A 3-D printed thermoplastic exoskeleton that allowed independent and enhanced movement of the index, middle and ring fingers was constructed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226500/sensing-textile-seam-line-for-wearable-multimodal-physiological-monitoring
#17
M McKnight, T Agcayazi, H Kausche, T Ghosh, A Bozkurt, M McKnight, T Agcayazi, H Kausche, T Ghosh, A Bozkurt, T Ghosh, T Agcayazi, M McKnight, A Bozkurt, H Kausche
This paper investigates a novel multimodal sensing method by forming seam-lines of conductive textile fibers into commercially available fabrics. The proposed ultra-low cost micro-electro-mechanical sensor would provide, wearable, flexible, textile based biopotential signal recording, wetness detection and tactile sensing simultaneously. Three types of fibers are evaluated for their array-based sensing capability, including a 3D printed conductive fiber, a multiwall carbon nanotube based fiber, and a commercially available stainless steel conductive thread...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226499/origami-microfluidic-paper-analytical-devices-ompad-for-sensing-and-diagnostics
#18
Meera Punjiya, Chung Hee Moon, Yu Chen, Sameer Sonkusale, Meera Punjiya, Chung Hee Moon, Yu Chen, Sameer Sonkusale, Yu Chen, Chung Hee Moon, Sameer Sonkusale, Meera Punjiya
Recent research activities in the area of low-cost sensing and diagnostics that are realized on cellulosic paper substrate are presented. First a three-dimensional origami paper-based analytical device (omPAD) with multiple electrochemical sensors, an integrated sample reservoir and tight integration with a custom CMOS potentiostat is presented. Second, an optical sensor array with built-in microfluidic channel for sample delivery is presented. The sensors are fabricated using a combination of wax printing and screen-printing using a solution based approach in ambient conditions without the need for expensive fabrication equipment or a cleanroom...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226489/3d-printed-microfluidic-mixer-for-point-of-care-diagnosis-of-anemia
#19
Kimberly Plevniak, Matthew Campbell, Mei He, Kimberly Plevniak, Matthew Campbell, Mei He, Matthew Campbell, Mei He, Kimberly Plevniak
3D printing has been an emerging fabrication tool in prototyping and manufacturing. We demonstrated a 3D microfluidic simulation guided computer design and 3D printer prototyping for quick turnaround development of microfluidic 3D mixers, which allows fast self-mixing of reagents with blood through capillary force. Combined with smartphone, the point-of-care diagnosis of anemia from finger-prick blood has been successfully implemented and showed consistent results with clinical measurements. Capable of 3D fabrication flexibility and smartphone compatibility, this work presents a novel diagnostic strategy for advancing personalized medicine and mobile healthcare...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226303/got-yoga-a-longitudinal-analysis-of-thematic-content-and-models-appearance-related-attributes-in-advertisements-spanning-four-decades-of-yoga-journal
#20
Erin Vinoski, Jennifer B Webb, Jan Warren-Findlow, Kirstyn A Brewer, Katheryn A Kiffmeyer
Yoga has become an increasingly common health practice among U.S. adults over the past decade. With this growth in popularity, yoga-related print media have been criticized for shifting away from yoga's traditional philosophies and promoting a thin, lean ideal physique representing the "yoga body." The purpose of this study was to (a) analyze the presence and content of advertisements over the 40-year publication history of Yoga Journal magazine and (b) explore female advertisement models' socio-demographic and appearance-related attributes over time...
February 16, 2017: Body Image
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