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Smart devices

Sameer Al-Ghamdi
BACKGROUND: The present study aimed to investigate smart device medical apps currently preferred by physicians in Saudi Arabia and the perceived impact of the apps on patient care. METHODS: Questionnaires for this cross-sectional study on smart device medical apps were randomly emailed to 384 physicians registered in the Saudi Commission of Health Specialists database. A total of 300 physicians returned completed questionnaires, with a response rate of 78.5%. Physician demographics and their perceptions of medical apps were assessed, including questions on the purpose, impact, and types of medical apps used...
April 20, 2018: BMC Public Health
Hyeeun Yang, Yulhee Lee, Dong In Kim, Hyeon Jin Seo, Jung-Hoon Yu, Sang-Hun Nam, Jin-Hyo Boo
Color changes controlled by electronic energies have been studied for many years in order to fabricate energy-efficient smart windows. Reduction and oxidization of nickel oxide under the appropriate voltage can change the color of a window. For a superior nickel oxide (NiO) electrochromic device (ECD), it is important to control the chemical and physical characteristics of the surface. In this study, we applied polystyrene bead templates to nickel oxide films to fabricate a honeycomb-structured electrochromic (EC) layer...
September 1, 2018: Journal of Nanoscience and Nanotechnology
Wei-Qi Wang, Xiu-Li Wang, Xin-Hui Xia, Zhu-Jun Yao, Yu Zhong, Jiang-Ping Tu
Construction of multifunctional photoelectrochemical energy devices is of great importance to energy saving. In this study, we have successfully prepared a mesoporous WO3 film on FTO glass via a facile dip-coating sol-gel method; the designed mesoporous WO3 film exhibited advantages including high transparency, good adhesion and high porosity. Also, multifunctional integrated energy storage and optical modulation ability are simultaneously achieved by the mesoporous WO3 film. Impressively, the mesoporous WO3 film exhibits a noticeable electrochromic energy storage performance with a large optical modulation up to 75...
April 20, 2018: Nanoscale
Zhuoqi Cheng, Brian L Davies, Darwin G Caldwell, Leonardo S Mattos
Peripheral intravenous catheterization (PIVC) is frequently required for various medical treatments. Over 1 billion PIVC operations are performed per year in the United States alone. However, this operation is characterized by a very low success rate, especially amongst pediatric patients. Statistics show that only 53% of first PIVC attempts are successful in pediatric patients. Since their veins are small and readily rupture, multiple attempts are commonly required before successfully inserting the catheter into the vein...
April 19, 2018: Annals of Biomedical Engineering
Paul Grandgeorge, Natacha Krins, Aurélie Hourlier-Fargette, Christel Laberty-Robert, Sébastien Neukirch, Arnaud Antkowiak
Soft deformable materials are needed for applications such as stretchable electronics, smart textiles, or soft biomedical devices. However, the design of a durable, cost-effective, or biologically compatible version of such a material remains challenging. Living animal cells routinely cope with extreme deformations by unfolding preformed membrane reservoirs available in the form of microvilli or membrane folds. We synthetically mimicked this behavior by creating nanofibrous liquid-infused tissues that spontaneously form similar reservoirs through capillarity-induced folding...
April 20, 2018: Science
Biranche Tandon, Jonny J Blaker, Sarah H Cartmell
The process of bone repair and regeneration requires multiple physiological cues including biochemical, electrical and mechanical - that act together to ensure functional recovery. Myriad materials have been explored as bioactive scaffolds to deliver these cues locally to the damage site, amongst these piezoelectric materials have demonstrated significant potential for tissue engineering and regeneration, especially for bone repair. Piezoelectric materials have been widely explored for power generation and harvesting, structural health monitoring, and use in biomedical devices...
April 16, 2018: Acta Biomaterialia
Yu Jun Tan, Jiake Wu, Hanying Li, Benjamin C K Tee
The survivability of living organisms relies critically on their ability to self-heal from damage in unpredictable situations and environmental variability. Such abilities are most important in external facing organs such as the mammalian skin. However, the properties of bulk elemental materials are typically unable to perform self-repair. Consequently, most conventional smart electronic devices today are not designed to repair themselves when damaged. Thus, inspired by the remarkable capability of self-healing in natural systems, smart self-healing materials are being intensively researched to mimic natural systems to have the ability to partially or completely self-repair damages inflicted on them...
April 18, 2018: ACS Applied Materials & Interfaces
Juan Guerrero-Ibáñez, Sherali Zeadally, Juan Contreras-Castillo
Modern society faces serious problems with transportation systems, including but not limited to traffic congestion, safety, and pollution. Information communication technologies have gained increasing attention and importance in modern transportation systems. Automotive manufacturers are developing in-vehicle sensors and their applications in different areas including safety, traffic management, and infotainment. Government institutions are implementing roadside infrastructures such as cameras and sensors to collect data about environmental and traffic conditions...
April 16, 2018: Sensors
William F Pickard, Barbara Abraham-Shrauner
The heat exchanger is important in practical thermal processes, especially those of (i) the molten-salt storage schemes, (ii) compressed air energy storage schemes and (iii) other load-shifting thermal storage presumed to undergird a Smart Grid. Such devices, although central to the utilization of energy from sustainable (but intermittent) renewable sources, will be unfamiliar to many scientists, who nevertheless need a working knowledge of them. This tutorial paper provides a largely self-contained conceptual introduction for such persons...
March 2018: Royal Society Open Science
Yeting Guo, Fang Liu, Zhiping Cai, Nong Xiao, Ziming Zhao
Smart sensor-equipped mobile devices sense, collect, and process data generated by the edge network to achieve intelligent control, but such mobile devices usually have limited storage and computing resources. Mobile cloud storage provides a promising solution owing to its rich storage resources, great accessibility, and low cost. But it also brings a risk of information leakage. The encryption of sensitive data is the basic step to resist the risk. However, deploying a high complexity encryption and decryption algorithm on mobile devices will greatly increase the burden of terminal operation and the difficulty to implement the necessary privacy protection algorithm...
April 13, 2018: Sensors
Rikkert J Nap, Estefania Gonzalez Solveyra, Igal Szleifer
When engineering nanomaterials for application in biological systems, it is important to understand how multivalent ions, such as calcium, affect the structural and chemical properties of polymer-modified nanoconstructs. In this work, a recently developed molecular theory was employed to study the effect of surface curvature on the calcium-induced collapse of end-tethered weak polyelectrolytes. In particular, we focused on cylindrical and spherical nanoparticles coated with poly(acrylic acid) in the presence of different amounts of Ca2+ ions...
April 13, 2018: Biomaterials Science
Rodrigo Almeida, Rui Oliveira, Miguel Luís, Carlos Senna, Susana Sargento
A common concern in smart cities is the focus on sensing procedures to provide city-wide information to city managers and citizens. To meet the growing demands of smart cities, the network must provide the ability to handle a large number of mobile sensors/devices, with high heterogeneity and unpredictable mobility, by collecting and delivering the sensed information for future treatment. This work proposes a multi-wireless technology communication platform for opportunistic data gathering and data exchange with respect to smart cities...
April 12, 2018: Sensors
Dan Li, Huazhen Duan, Yadan Ma, Wei Deng
This study demonstrates a novel strategy for colorimetric/surface enhanced Raman scattering (SERS) dual-mode sensing of sulfur dioxide (SO2) by coupling headspace sampling (HS) with paper-based analytical device (PAD). The smart and multifunctional PAD is fabricated with a vacuum filtration method in which 4-mercaptopyridine (Mpy)-modified gold nanorods (GNRs)-reduced graphene oxide (rGO) hybrids (rGO/MPy-GNRs), anhydrous methanol and starch-iodine complex are immobilized into cellulose-based filter papers...
April 12, 2018: Analytical Chemistry
Oliver Carr, Kate E A Saunders, Amy C Bilderbeck, Athanasios Tsanas, Niclas Palmius, John R Geddes, Russell Foster, Maarten De Vos, Guy M Goodwin
It has long been proposed that diurnal rhythms are disturbed in bipolar disorder (BD). Such changes are obvious in episodes of mania or depression. However, detailed study of patients between episodes has been rare and comparison with other psychiatric disorders rarer still. Our hypothesis was that evidence for desynchronization of diurnal rhythms would be evident in BD and that we could test the specificity of any effect by studying borderline personality disorder (BPD). Individuals with BD (n = 36), BPD (n = 22) and healthy volunteers (HC, n = 25) wore a portable heart rate and actigraphy device and used a smart-phone to record self-assessed mood scores 10 times per day for 1 week...
April 12, 2018: Translational Psychiatry
Lucille Babel, Laure Guénée, Céline Besnard, Svetlana V Eliseeva, Stéphane Petoud, Claude Piguet
Metal-containing (bio)organic polymers are materials of continuously increasing importance for applications in energy storage and conversion, drug delivery, shape-memory items, supported catalysts, organic conductors and smart photonic devices. The embodiment of luminescent components provides a revolution in lighting and signaling with the ever-increasing development of polymeric light-emitting devices. Despite the unique properties expected from the introduction of optically and magnetically active lanthanides into organic polymers, the deficient control of the metal loading currently limits their design to empirical and poorly reproducible materials...
January 14, 2018: Chemical Science
Gyeong Woo Cheon, Berk Gonenc, Russell H Taylor, Peter L Gehlbach, Jin U Kang
In this study, we built and tested a handheld motion-guided micro-forceps system using common-path swept source optical coherence tomography (CP-SSOCT) for highly accurate depth controlled epiretinal membranectomy. A touch sensor and two motors were used in the forceps design to minimize the inherent motion artifact while squeezing the tool handle to actuate the tool and grasp, and to independently control the depth of the tool-tip. A smart motion monitoring and a guiding algorithm were devised to provide precise and intuitive freehand control...
December 2017: IEEE/ASME Transactions on Mechatronics
Nathalie Barroca, Ana Marote, Sandra I Vieira, Abílio Almeida, Maria H V Fernandes, Paula M Vilarinho, Odete A B da Cruz E Silva
Tissue engineering is evolving towards the production of smart platforms exhibiting stimulatory cues to guide tissue regeneration. This work explores the benefits of electrical polarization to produce more efficient neural tissue engineering platforms. Poly (l-lactic) acid (PLLA)-based scaffolds were prepared as solvent cast films and electrospun aligned nanofibers, and electrically polarized by an in-lab built corona poling device. The characterization of the platforms by thermally stimulated depolarization currents reveals a polarization of 60 × 10-10 C cm-2 that is stable on poled electrospun nanofibers for up to 6 months...
March 30, 2018: Colloids and Surfaces. B, Biointerfaces
Maria Leonora G Comello, Jeannette H Porter
BACKGROUND: Wearable/portable devices that unobtrusively detect smoking and contextual data offer the potential to provide Just-In-Time Adaptive Intervention (JITAI) support for mobile cessation programs. Little has been reported on the development of these technologies. INTRODUCTION: To address this gap, we offer a case report of users' experiences with a prototype "smart" cigarette case that automatically tracks time and location of smoking. Small-scale user-experience studies are typical of iterative product design and are especially helpful when proposing novel ideas...
April 5, 2018: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
Ravi M A P Lima, José Jarib Alcaraz-Espinoza, Fernando A G da Silva, Helinando P de Oliveira
Multifunctional wearable electronic textiles based on interfacial polymerization of polypyrrole on carbon nanotubes/cotton fibers offer advantages of simple and low-cost materials that incorporate bactericidal, good electrochemical performance and electrical heating properties. The high conductivity of doped polypyrrole/CNT composite provides textiles that reaches temperature in order of 70 °C with field of 5V/cm, superior electrochemical performance applied as electrodes of supercapacitor prototypes, reaching capacitance in order of 30 Fg-1 and strong bactericidal activity against Staphylococcus aureus...
April 5, 2018: ACS Applied Materials & Interfaces
Prabal Dev Bhuyan, Sanjeev K Gupta, Ashok Kumar, Yogesh Sonvane, P N Gajjar
Recent studies on the electronic, magnetic and optical properties of VO2 (vanadium dioxide) materials have motivated the exploration of one dimensional VO2 nanowires. First principles calculations were performed to investigate the structural, electronic, magnetic and optical properties of the monoclinic (M) and rutile (R) phases of VO2 nanowires. The monoclinic phase shows semiconducting behaviour with a band gap of 1.17 eV, whereas the rutile phase of VO2 nanowires behaves as a spin gapless semiconducting material, as band lines cross the Fermi level due only to up spin contribution...
April 5, 2018: Physical Chemistry Chemical Physics: PCCP
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