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https://www.readbyqxmd.com/read/28230707/low-cost-3d-printing-orbital-implant-templates-in-secondary-orbital-reconstructions
#1
Alison B Callahan, Ashley A Campbell, Carisa Petris, Michael Kazim
PURPOSE: Despite its increasing use in craniofacial reconstructions, three-dimensional (3D) printing of customized orbital implants has not been widely adopted. Limitations include the cost of 3D printers able to print in a biocompatible material suitable for implantation in the orbit and the breadth of available implant materials. The authors report the technique of low-cost 3D printing of orbital implant templates used in complex, often secondary, orbital reconstructions. METHODS: A retrospective case series of 5 orbital reconstructions utilizing a technique of 3D printed orbital implant templates is presented...
February 22, 2017: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28230340/all-inkjet-printed-metal-oxide-thin-film-transistor-array-with-good-stability-and-uniformity-using-surface-energy-patterns
#2
Yuzhi Li, Linfeng Lan, Sheng Sun, Zhenguo Lin, Peixiong Gao, Wei Song, Erlong Song, Peng Zhang, Junbiao Peng
An array of inkjet-printed metal-oxide thin-film transistors (TFTs) is demonstrated for the first time with the assistance of surface-energy patterns prepared by printing pure solvent to etch the ultrathin hydrophobic layer. The surface-energy patterns not only restrained the spreading of inks but also provided a facile way to regulate the morphology of metal oxide films without optimizing ink formulation. The fully printed InGaO TFT devices in the array exhibited excellent electron transport characteristics with a maximum mobility of 11...
February 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28227479/a-low-cost-3-d-printed-stethoscope-connected-to-a-smartphone
#3
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/28227188/conformai-electronics-for-longitudinal-bio-sensing-in-at-home-assistive-and-rehabilitative-devices
#4
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/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
#5
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/28226499/origami-microfluidic-paper-analytical-devices-ompad-for-sensing-and-diagnostics
#6
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/28222591/a-universal-strategy-to-reduce-noise-current-for-sensitive-organic-photodetectors
#7
Sixing Xiong, Lingliang Li, Fei Qin, Lin Mao, Bangwu Luo, Youyu Jiang, Zaifang Li, Jinsong Huang, Yinhua Zhou
Low noise current is critical for achieving high-detectivity organic photodetectors. Inserting charge blocking layers is an effective approach to suppress the reverse-biased dark current. However, in solution-processed organic photodetectors, the charge transport material needs to be dissolved in solvents that don't dissolve the underneath light-absorbing layer, which is not always possible for all kinds of light absorbing materials developed. Here, we introduce a universal strategy of transfer-printing a conjugated polymer poly(3-hexylthiophene) (P3HT) as the electron-blocking layer to realize highly sensitive photodetectors...
February 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28218507/enabling-inkjet-printed-graphene-for-ion-selective-electrodes-with-post-print-thermal-annealing
#8
Qing He, Suprem R Das, Nathaniel T Garland, Dapeng Jing, John A Hondred, Allison A Cargill, Shaowei Ding, Chandran Karunakaran, Jonathan C Claussen
Inkjet printed graphene (IPG) has recently shown tremendous promise in reducing the cost and complexity of graphene circuit fabrication. Herein we demonstrate, for the first time, the fabrication of an ion selective electrode (ISE) with IPG. A thermal annealing process in a nitrogen ambient environment converts the IPG into a highly conductive electrode (sheet resistance changes from 52.8 ± 7.4 MΩ/☐ for unannealed graphene to 172.7 ± 33.3Ω/☐ for graphene annealed at 950°C). Raman spectroscopy and field emission scanning electron microscopy (FESEM) analysis reveals that the printed graphene flakes begin to smooth at an annealing temperature of 500°C and then become more porous and more electrically conductive when annealed at temperatures of 650°C and above...
February 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28218485/mechanically-milled-irregular-zinc-nanoparticles-for-printable-bioresorbable-electronics
#9
Bikram K Mahajan, Xiaowei Yu, Wan Shou, Heng Pan, Xian Huang
Bioresorbable electronics is predominantly realized by complex and time-consuming anhydrous fabrication processes. New technology explores printable methods using inks containing micro- or nano-bioresorbable particles (e.g., Zn and Mg). However, these particles have seldom been obtained in the context of bioresorbable electronics using cheap, reliable, and effective approaches with limited study on properties essential to printable electronics. Here, irregular nanocrystalline Zn with controllable sizes and optimized electrical performance is obtained through ball milling approach using polyvinylpyrrolidone (PVP) as a process control agent to stabilize Zn particles and prevent cold welding...
February 20, 2017: Small
https://www.readbyqxmd.com/read/28207331/a-systematic-review-of-cardiovascular-disease-in-sexual-minorities
#10
Billy A Caceres, Abraham Brody, Rachel E Luscombe, Jillian E Primiano, Peter Marusca, Edward M Sitts, Deborah Chyun
BACKGROUND: Mental health and HIV disparities are well documented among sexual minorities, but there is a dearth of research on other chronic conditions. Cardiovascular disease remains the leading cause of death worldwide. Although sexual minorities have high rates of several modifiable risk factors for cardiovascular disease (including stress, tobacco use, and alcohol consumption), there is a paucity of research in this area. OBJECTIVES: In this systematic review, we synthesized and critiqued the existing evidence on cardiovascular disease among sexual minority adults...
February 16, 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/28206760/nano-engineered-eggshell-silver-tailored-co-polyester-polymer-blend-film-with-antimicrobial-properties
#11
Boniface J Tiimob, Gregory Mwinyelle, Woubit Abdela, Temesgen Samuel, Shaik Jeelani, Vijaya K Rangari
In this study, the reinforcement effect of different proportions of eggshell/silver nanomaterial (ES-Ag) on structural and antimicrobial properties of 70/30 poly (butylene-co-adipate terephthalate)/polylactic acid (PBAT/PLA) immiscible blends were investigated. The ES-Ag was synthesized using a single step ball milling process, and characterized with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). These results confirmed the existence of silver nanoparticles (Ag NPs) in the interstitial spaces of the eggshell particles...
February 16, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28206671/surgery-for-cataracts-in-people-with-age-related-macular-degeneration
#12
REVIEW
Heather Casparis, Kristina Lindsley, Irene C Kuo, Shameema Sikder, Neil M Bressler
BACKGROUND: Cataract and age-related macular degeneration (AMD) are common causes of decreased vision that often occur simultaneously in people over age 50. Although cataract surgery is an effective treatment for cataract-induced visual loss, some clinicians suspect that such an intervention may increase the risk of worsening of underlying AMD and thus have deleterious effects on vision. OBJECTIVES: The objective of this review was to evaluate the effectiveness and safety of cataract surgery compared with no surgery in eyes with AMD...
February 16, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28198059/gigahertz-electromagnetic-structures-via-direct-ink-writing-for-radio-frequency-oscillator-and-transmitter-applications
#13
Nanjia Zhou, Chengye Liu, Jennifer A Lewis, Donhee Ham
Radio-frequency (RF) electronics, which combine passive electromagnetic devices and active transistors to generate and process gigahertz (GHz) signals, provide a critical basis of ever-pervasive wireless networks. While transistors are best realized by top-down fabrication, relatively larger electromagnetic passives are within the reach of printing techniques. Here, direct writing of viscoelastic silver-nanoparticle inks is used to produce a broad array of RF passives operating up to 45 GHz. These include lumped devices such as inductors and capacitors, and wave-based devices such as transmission lines, their resonant networks, and antennas...
February 15, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28195832/four-dimensional-printing-hierarchy-scaffolds-with-highly-biocompatible-smart-polymers-for-tissue-engineering-applications
#14
Shida Miao, Wei Zhu, Nathan J Castro, Jinsong Leng, Lijie Grace Zhang
The objective of this study was to four-dimensional (4D) print novel biomimetic gradient tissue scaffolds with highly biocompatible naturally derived smart polymers. The term "4D printing" refers to the inherent smart shape transformation of fabricated constructs when implanted minimally invasively for seamless and dynamic integration. For this purpose, a series of novel shape memory polymers with excellent biocompatibility and tunable shape changing effects were synthesized and cured in the presence of three-dimensional printed sacrificial molds, which were subsequently dissolved to create controllable and graded porosity within the scaffold...
October 2016: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28195705/top-contact-self-aligned-printing-for-high-performance-carbon-nanotube-thin-film-transistors-with-sub-micron-channel-length
#15
Xuan Cao, Fanqi Wu, Christian Lau, Yihang Liu, Qingzhou Liu, Chongwu Zhou
Semiconducting single-wall carbon nanotubes are ideal semiconductors for printed thin-film transistors due to their excellent electrical performance and intrinsic printability with solution-based deposition. However, limited by resolution and registration accuracy of current printing techniques, previously reported fully printed nanotube transistors had rather long channel lengths (>20 μm) and consequently low current-drive capabilities (<0.2 μA/μm). Here we report fully inkjet printed nanotube transistors with dramatically enhanced on-state current density of ∼4...
February 14, 2017: ACS Nano
https://www.readbyqxmd.com/read/28195694/laser-lithography-of-a-tube-in-a-tube-nanostructure
#16
Allen L Ng, Yanmei Piao, YuHuang Wang
Carbon nanotubes hold vast potential for device innovations because their optical and electronic properties can be synthetically tailored at a length scale unattainable by lithographic techniques. However, lithographic patterning of carbon nanotubes with electronic-type control remains one of the major problems for the integration of these nanomaterials for practical device applications. In this work, we propose a laser lithography method for direct-write patterning of devices on thin films of outer wall selectively functionalized double-walled carbon nanotubes (Tube^2)...
February 17, 2017: ACS Nano
https://www.readbyqxmd.com/read/28193355/a-paper-based-nanomodified-electrochemical-biosensor-for-ethanol-detection-in-beers
#17
Stefano Cinti, Mattia Basso, Danila Moscone, Fabiana Arduini
Herein, we report the first example of a paper-based screen-printed biosensor for the detection of ethanol in beer samples. Common office paper was adopted to fabricate the analytical device. The properties of this paper-based screen-printed electrode (SPE) were investigated by cyclic voltammetry, electrochemical impedance spectroscopy, and scanning electron microscopy, and they were compared with the well-established polyester-based SPEs as well. Paper demonstrated similar properties when compared with polyester, highlighting suitability towards its utilization in sensor development, with the advantages of low cost and simple disposal by incineration...
April 1, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28192644/perioperative-antibiotics-for-prevention-of-acute-endophthalmitis-after-cataract-surgery
#18
REVIEW
Emily W Gower, Kristina Lindsley, Samantha E Tulenko, Afshan A Nanji, Ilya Leyngold, Peter J McDonnell
BACKGROUND: Endophthalmitis is a severe inflammation of the anterior or posterior (or both) chambers of the eye that may be sterile or associated with infection. It is a potentially vision-threatening complication of cataract surgery. Prophylactic measures for endophthalmitis are targeted against various sources of infection. OBJECTIVES: To evaluate the effects of perioperative antibiotic prophylaxis for endophthalmitis following cataract surgery compared with no prophylaxis or other form of prophylaxis...
February 13, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28183607/anti-microbial-surfaces-an-approach-for-deposition-of-zno-nanoparticles-on-pva-gelatin-composite-film-by-screen-printing-technique
#19
J V Meshram, V B Koli, M R Phadatare, S H Pawar
Initially micro-organisms get exposed to the surfaces, this demands development of anti-microbial surfaces to inhibit their proliferation. Therefore, herein, we attempt screen printing technique for development of PVA-GE/ZnO nanocomposite (PG/ZnO) films. The synthesis of PG/ZnO nanocomposite includes two steps as: (i) Coating of Zinc Oxide nanoparticles (ZnO NPs) by poly ethylene glycol in order to be compatible with organic counterparts. (ii) Deposition of coated nanoparticles on the PG film surface. The results suggest the enhancement in anti-microbial activity of PG/ZnO nanocomposite over pure ZnO NPs against both Gram positive Bacillus subtilis and Gram negative Escherichia coli from zone of inhibition...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28182461/reflections-on-the-journal-of-applied-psychology-for-1989-to-1994-changes-in-major-research-themes-and-practices-over-25-years
#20
Neal Schmitt
Informal observations concerning journal content indicates that research investigating organizational behavior topics, including work on the structure of groups and determinants and consequences of group process along with the role of leadership in groups, has increased. Some topics have disappeared (e.g., job analysis, human factors, union-related work, consumer behavior) and others are declining (e.g., research methods, psychometrics). Perhaps the biggest change is in the length of articles, which is mostly a function of the inclusion of greater numbers of references and appendix material...
February 9, 2017: Journal of Applied Psychology
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