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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/28227806/a-new-soft-material-based-in-the-ear-eeg-recording-technique
#2
Hao Dong, Paul M Matthews, Yike Guo, Hao Dong, Paul M Matthews, Yike Guo, Hao Dong, Paul M Matthews, Yike Guo
Long-term electroencephalogram (EEG) is important for seizure detection, sleep monitoring and etc. In-the- ear EEG device makes such recording robust to noise and privacy protected (invisible to other people). However, the state-of-art techniques suffer from various drawbacks such as customization for specific users, manufacturing difficulties and short life cycle. To address these issues, we proposed silvered glass silicone based in-the-ear electrode which can be manufactured using conventional compression moulding...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227793/experimental-validation-of-neutron-activation-simulation-of-a-varian-medical-linear-accelerator
#3
S Morato, B Juste, R Miro, G Verdu, S Diez, S Morato, B Juste, R Miro, G Verdu, S Diez, B Juste, S Diez, R Miro, S Morato, G Verdu
This work presents a Monte Carlo simulation using the last version of MCNP, v. 6.1.1, of a Varian CLinAc emitting a 15MeV photon beam. The main objective of the work is to estimate the photoneutron production and activated products inside the medical linear accelerator head. To that, the Varian LinAc head was modelled in detail using the manufacturer information, and the model was generated with a CAD software and exported as a mesh to be included in the particle transport simulation. The model includes the transport of photoneutrons generated by primary photons and the (n, γ) reactions which can result in activation products...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227513/in-vitro-assessment-of-long-term-reliability-of-low-cost-%C3%AE-ecog-arrays
#4
Kay Palopoli-Trojani, Virginia Woods, Chia-Han Chiang, Michael Trumpis, Jonathan Viventi, Kay Palopoli-Trojani, Virginia Woods, Chia-Han Chiang, Michael Trumpis, Jonathan Viventi, Kay Palopoli-Trojani, Virginia Woods, Chia-Han Chiang, Jonathan Viventi, Michael Trumpis
Micro-electrocorticographic (μECοG) electrode arrays provide a minimally invasive, high-resolution neural interface with broad cortical coverage. Previously, we fabricated μECoG arrays at a lower cost than commercially available devices using low-cost industrial processes [1], [2]. Here, we report the in vitro electrical performance of five μECoG designs undergoing an accelerated aging protocol. The impedance and yield of the μECoG arrays were tracked over time. The equivalent lifetime at 37°C depended on the manufacturer and material stack-up, and ranged between 30 and greater than 760 days (ongoing)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227503/suitability-of-nitinol-electrodes-in-neural-prostheses-such-as-endovascular-neural-interfaces
#5
Yan T Wong, Nicholas L Opie, Sam E John, Giulia Gerboni, Gil S Rind, Stephen M Ronayne, Kate E Fox, Thomas J Oxley, David B Grayden, Yan T Wong, Nicholas L Opie, Sam E John, Giulia Gerboni, Gil S Rind, Stephen M Ronayne, Kate E Fox, Thomas J Oxley, David B Grayden, Sam E John, Stephen M Ronayne, David B Grayden, Nicholas L Opie, Kate E Fox, Giulia Gerboni, Thomas J Oxley, Yan T Wong, Gil S Rind
A major challenge facing neural prostheses is the development of electrodes that are well tolerated by the brain and body. A novel way to circumvent the need to perform an invasive craniotomy and penetration of the blood-brain barrier to implant electrodes, is to guide electrodes up into the cerebral veins and place electrodes on the vessel walls adjacent to neuronal populations. To aid in the development of these stent based devices, microelectrodes manufactured from Nitinol would allow electrodes to be implanted via a catheter and then once deployed, alter their shape to conform to the vessel walls...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227161/in-to-out-body-path-loss-for-wireless-radio-frequency-capsule-endoscopy-in-a-human-body
#6
G Vermeeren, E Tanghe, A Thielens, L Martens, W Joseph, G Vermeeren, E Tanghe, A Thielens, L Martens, W Joseph, E Tanghe, A Thielens, L Martens, G Vermeeren, W Joseph
Physical-layer characterization is important for design of in-to-out body communication for wireless body area networks (WBANs). This paper numerically investigates the path loss of an in-to-out body radio frequency (RF) wireless link between an endoscopy capsule and a receiver outside the body using a 3D electromagnetic solver. A spiral antenna in the endoscopy capsule is tuned to operate in the Medical Implant Communication Service (MICS) band at 402 MHz, accounting for the properties of the human body. The influence of misalignment, rotation of the capsule, and human body model are investigated...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227155/teaching-biomedical-design-through-a-university-industry-partnership
#7
Lunal Khuon, Karl R Zum, Jane B Zurn, Gerald M Herrera, Lunal Khuon, Karl R Zum, Jane B Zurn, Gerald M Herrera, Gerald M Herrera, Karl R Zurn, Lunal Khuon
This paper describes a course that, as a result of a university-industry partnership, emphasizes bringing industry experts into the classroom to teach biomedical design. Full-time faculty and industry engineers and entrepreneurs teach the senior technical elective course, Biomedical System Design. This hands-on senior course in biomedical system design places varied but connected emphasis on understanding the biological signal source, electronics design, safety, patient use, medical device qualifications, and good manufacturing practices...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227097/effects-of-geometry-and-material-on-the-insertion-of-very-small-neural-electrode
#8
Shaun P Marshall, Wei-Chen Lin, Paras R Patel, Albert J Shih, Cynthia A Chestek, Shaun P Marshall, Wei-Chen Lin, Paras R Patel, Albert J Shih, Cynthia A Chestek, Wei-Chen Lin, Shaun P Marshall, Cynthia A Chestek, Albert J Shih, Paras R Patel
For neural probes to be used chronically for years in the human body, they must provoke minimal scarring. Recently, a number of groups have reported substantially reduced scar tissue using cellular scale electrodes below 15 μm in size. This size scale is accessible to manufacturing techniques, but can be very difficult to insert in the brain for most common electrode materials. In this study, we explore the design space available to cellular scale electrodes that will self-insert into the brain. First a mathematical model is developed using beam buckling equations for different materials and geometries...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227090/amplitude-based-beat-detection-for-atrial-fibrillation-in-pacemaker
#9
Seung Hwan Lee, Hyoun Seok Myoung, Chang Hoon Kang, Eue Keun Choi, Kyoung Joung Lee, Seung Hwan Lee, Hyoun Seok Myoung, Chang Hoon Kang, Eue Keun Choi, Kyoung Joung Lee, Chang Hoon Kang, Eue Keun Choi, Seung Hwan Lee, Kyoung Joung Lee, Hyoun Seok Myoung
Bradycardia is defined as a sinus rhythm of less than 60 beats per minute and atrial tachyarrhythmia including atrial fibrillation (AF) is frequently associated with bradycardia. Pacemaker is the only effective treatment for symptomatic bradycardia and automatic mode switching (AMS) function is built in pacemaker to switch mode in the presence of atrial tachyarrhythmia. AMS algorithms consider appropriate mode switching in case of undersensing or oversensing and this consideration makes their onset time and resynchronization time late...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227025/arguing-effectiveness-of-biomedical-signal-acquisition-devices-using-colored-petri-nets-models-and-assurance-cases-in-gsn-an-ecg-case-study
#10
Alvaro Sobrinho, Paulo Cunha, Leandro Dias da Silva, Angelo Perkusich, Thiago Cordeiro, Jarbas Segundo, Alvaro Sobrinho, Paulo Cunha, Leandro Dias da Silva, Angelo Perkusich, Thiago Cordeiro, Jarbas Segundo, Leandro Dias da Silva, Paulo Cunha, Alvaro Sobrinho, Angelo Perkusich, Jarbas Segundo, Thiago Cordeiro
Reported cases of adverse events and product recalls expose limitations of biomedical signal acquisition devices. Approximately, ninety percent of the 1.210 recalls reported by the US Food and Drug Administration (FDA) between 2006 and 2011 were of class 2 devices such as Electrocardiography (ECG) devices. We show in this paper how manufacturers of biomedical signal acquisition devices can argue effectiveness of these devices using Colored Petri Nets (CPN) models and assurance cases in Goal Structuring Notation (GSN) by means of an ECG case study...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226935/the-hybrid-bio-inspired-aerial-vehicle-concept-and-simscape-flight-simulation
#11
Tao Zhang, Steven Su, Hung T Nguyen, Tao Zhang, Steven Su, Hung T Nguyen, Steven Su, Tao Zhang, Hung T Nguyen
This paper introduces a Silver Gull-inspired hybrid aerial vehicle, the Super Sydney Silver Gull (SSSG), which is able to vary its structure, under different manoeuvre requirements, to implement three flight modes: the flapping wing flight, the fixed wing flight, and the quadcopter flight (the rotary wing flight of Unmanned Air Vehicle). Specifically, through proper mechanism design and flight mode transition, the SSSG can imitate the Silver Gull's flight gesture during flapping flight, save power consuming by switching to the fixed wing flight mode during long-range cruising, and hover at targeted area when transferring to quadcopter flight mode...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226921/hardware-image-assessment-for-wireless-endoscopy-capsules
#12
M A Khorsandi, N Karimi, S Samavi, M Hajabdollahi, S M R Soroushmehr, K Ward, K Najarian, M A Khorsandi, N Karimi, S Samavi, M Hajabdollahi, S M R Soroushmehr, K Ward, K Najarian, K Ward, S M R Soroushmehr, M Hajabdollahi, S Samavi, K Najarian, M A Khorsandi, N Karimi
Wireless capsule endoscopy is a new technology in the realm of telemedicine that has many advantages over the traditional endoscopy systems. Transmitted images should help diagnosis of diseases of the gastrointestinal tract. Two important technical challenges for the manufacturers of these capsules are power consumption and size of the circuitry. Also, the system must be fast enough for real-time processing of image or video data. To solve this problem, many hardware designs have been proposed for implementation of the image processing unit...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226568/design-of-a-spring-assisted-exoskeleton-module-for-wrist-and-hand-rehabilitation
#13
Joel C Perry, Shawn Trimble, Luiz Gustavo Castilho Machado, Jeremiah S Schroeder, Aitor Belloso, Cristina Rodriguez-de-Pablo, Thierry Keller, Joel C Perry, Shawn Trimble, Luiz Gustavo Castilho Machado, Jeremiah S Schroeder, Aitor Belloso, Cristina Rodriguez-de-Pablo, Thierry Keller, Cristina Rodriguez-De-Pablo, Joel C Perry, Jeremiah S Schroeder, Aitor Belloso, Luiz Gustavo Castilho Machado, Thierry Keller, Shawn Trimble
This paper reports on the development of a low-profile exoskeleton module to enable training of the fingers and thumb in grasp and release tasks. The design has been made as an add-on module for use with the ArmAssist arm rehabilitation system (Tecnalia, Spain). Variable-position springs and adjustable link lengths provide adaptability to fit a variety of users. Additive manufacturing has been utilized for the majority of components allowing easy modifications. A few structural components were machined from aluminum or steel to produce a functional prototype with sufficient strength for direct evaluation...
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
#14
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/28226272/automated-processing-extraction-and-detection-of-herpes-simplex-virus-types-1-and-2-a-comparative-evaluation-of-three-commercial-platforms-using-clinical-specimens
#15
Matthew J Binnicker, Mark J Espy, Brian Duresko, Cole Irish, Jay Mandrekar
BACKGROUND: Recently, automated platforms have been developed that can perform processing, extraction and testing for herpes simplex virus (HSV) nucleic acid on a single instrument. OBJECTIVES: In this study, we compared three commercially-available systems; Aptima(®)/Panther (Hologic, San Diego, CA), ARIES(®) (Luminex Corporation, Austin, TX), and cobas(®) 4800 (Roche Molecular Systems Inc, Pleasanton, CA) for the qualitative detection of HSV-1/2 in clinical samples...
February 14, 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/28225633/accuracy-evaluation-of-four-blood-glucose-monitoring-systems-in-the-hands-of-intended-users-and-trained-personnel-based-on-iso-15197-requirements
#16
Guido Freckmann, Annette Baumstark, Nina Jendrike, Delia Rittmeyer, Stefan Pleus, Cornelia Haug
BACKGROUND: Self-monitoring of blood glucose (BG) is an integral part in the therapy of people with diabetes, which is why blood glucose monitoring systems (BGMS) have to fulfill minimum accuracy requirements. However, accuracy is often assessed by trained operators, although such assessments do not necessarily allow for drawing conclusions on accuracy in the hands of lay users. METHODS: The accuracy of 4 different BGMS (Accu-Chek(®) Active, Accu-Chek(®) Performa, Contour(®)Plus, and OneTouch(®) SelectSimple™) in the hands of lay users and trained study personnel was assessed in this study...
February 22, 2017: Diabetes Technology & Therapeutics
https://www.readbyqxmd.com/read/28225316/adverse-event-reporting-in-patients-treated-with-thyroid-hormone-extract
#17
Rupendra T Shrestha, Alan Malabanan, Bryan R Haugen, Elliott G Levy, James V Hennessey
OBJECTIVE: Thyroid hormone extract is used for the treatment of thyroid disorders but limited data exist on adverse events commonly noted by the physicians associated with this use. The purpose of this survey was to report adverse events observed by expert physicians managing patients treated for thyroid disease with thyroid hormones. METHODS: Members of the American Thyroid Association, The Endocrine Society and the American Association of Clinical Endocrinologists developed a survey instrument modeled on the FDA's reported adverse events for levothyroxine that would effectively assess the clinical experience of frequent prescribers of thyroid hormone...
February 22, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28225261/structural-color-for-additive-manufacturing-3d-printed-photonic-crystals-from-block-copolymers
#18
Bret M Boyle, Tracy A French, Ryan Michael Pearson, Blaine G McCarthy, Garret M Miyake
The incorporation of structural color into 3D printed parts is reported, presenting an alternative to the need for pigments or dyes for colored parts produced through additive manufacturing. Thermoplastic build materials composed of dendritic block copolymers were designed, synthesized, and used to additively manufacture plastic parts exhibiting structural color. The reflection properties of the photonic crystals arise from the periodic nanostructure formed through block copolymer self-assembly during polymer processing...
February 22, 2017: ACS Nano
https://www.readbyqxmd.com/read/28225181/two-phase-reactions-in-microdroplets-without-the-use-of-phase-transfer-catalysts
#19
Xin Yan, Heyong Cheng, Richard N Zare
Many important chemical transformations occur in two-phase reactions, which are widely used in chemical, pharmaceutical, and polymer manufacturing. We present an efficient method for performing two-phase reactions in microdroplets sheared by sheath gas without using a phase-transfer catalyst. This avoids disadvantages such as thermal instability, high cost, and, especially, the need to separate and recycle the catalysts. We show that various alcohols can be oxidized to the corresponding aldehydes and ketones within milliseconds in moderate to good yields (50-75 %)...
February 22, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28225145/significant-variations-in-the-seroprevalence-of-c6-elisa-antibodies-in-a-highly-endemic-area-for-lyme-borreliosis-evaluation-of-age-sex-and-seasonal-differences
#20
Marcus Johansson, Lena Manfredsson, Annika Wistedt, Lena Serrander, Ivar Tjernberg
The purpose of this study was to assess the seroprevalence of C6 ELISA antibodies in healthy blood donors in Kalmar County, Sweden, in relation to age, sex and time of year (peak season vs off season). In addition, we wanted to assess serological status over time in a group of C6 ELISA seropositive blood donors. Sera were collected from 273 (131 women, 142 men) blood donors in autumn 2011 and 300 (144 women, 156 men) in winter 2014. All sera were analysed in the C6 ELISA and the results were interpreted according to the manufacturer's instructions...
February 22, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
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