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https://www.readbyqxmd.com/read/28805692/real-time-rain-rate-evaluation-via-satellite-downlink-signal-attenuation-measurement
#1
Filippo Giannetti, Ruggero Reggiannini, Marco Moretti, Elisa Adirosi, Luca Baldini, Luca Facheris, Andrea Antonini, Samantha Melani, Giacomo Bacci, Antonio Petrolino, Attilio Vaccaro
We present the NEFOCAST project (named by the contraction of "Nefele", which is the Italian spelling for the mythological cloud nymph Nephele, and "forecast"), funded by the Tuscany Region, about the feasibility of a system for the detection and monitoring of precipitation fields over the regional territory based on the use of a widespread network of new-generation Eutelsat "SmartLNB" (smart low-noise block converter) domestic terminals. Though primarily intended for interactive satellite services, these devices can also be used as weather sensors, as they have the capability of measuring the rain-induced attenuation incurred by the downlink signal and relaying it on an auxiliary return channel...
August 12, 2017: Sensors
https://www.readbyqxmd.com/read/28800508/a-suspending-droplet-mode-paper-based-microfluidic-platform-for-low-cost-rapid-and-convenient-detection-of-lead-ii-ions-in-liquid-solution
#2
Han Sun, Wanbo Li, Zhen-Zhen Dong, Chong Hu, Chung-Hang Leung, Dik-Lung Ma, Kangning Ren
A paper-based microfluidic device based on unconventional principle was developed and used to detect lead ions through a two-step process including heated incubation and subsequent mixing. The device was made by generating a superhydrophobic pattern, which defines channel and reservoir barriers, on a water-impermeable paper substrate, followed by loading and drying the reagents in the defined reservoirs. Different from the conventional paper-based devices that are made of water-permeable paper, the as-prepared device holds water drops in discrete reservoirs, and the water drops will not move unless the device is titled along the direction of the predefined channels...
August 1, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28800221/graphene-paper-pressure-sensor-for-detecting-human-motions
#3
Lu-Qi Tao, Kun-Ning Zhang, He Tian, Ying Liu, Dan-Yang Wang, Yuan-Quan Chen, Yi Yang, Tian-Ling Ren
The pressure sensors should have an excellent sensitivity in the range of 0-20kPa when applied in wearable applications. Traditional pressure sensors can't achieve both a high sensitivity and a large working range simultaneously, which results to their limited applications in wearable fields. There is an urgent need to develop a pressure sensor to make a breakthrough in both sensitivity and working range. In this paper, a graphene-paper pressure sensor which shows excellent performance in the range of 0-20kPa is proposed...
August 11, 2017: ACS Nano
https://www.readbyqxmd.com/read/28799525/fast-light-induced-reversible-wettability-of-zinc-oxide-nanorod-array-coated-with-gold-thin-layer
#4
Yuefan Wei, Hejun Du, Junhua Kong, Van Thai Tran, Jia Kai Koh, Chenyang Zhao, Chaobin He
Zinc oxide (ZnO) has gained much attention nowadays due to its excellent physical and chemical properties, and been extensively studied in energy harvesting applications, such as photovoltaic and piezoelectric devices. In recent years, its reversible wettability has also been attracting increasing interests. The wettability of ZnO nanostructures with various morphologies was studied. However, to our best knowledge, there is still a lack of investigations on further modifications on ZnO to provide more benefits outweighed to pristine ZnO...
August 11, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28796753/comparative-study-of-radon-concentration-with-two-techniques-and-elemental-analysis-in-drinking-water-samples-of-the-jammu-district-jammu-and-kashmir-india
#5
Ajay Kumar, Manpreet Kaur, Rohit Mehra, Dinesh Kumar Sharma, Rosaline Mishra
The level of radon concentration has been assessed using the Advanced SMART RnDuo technique in 30 drinking water samples from Jammu district, Jammu and Kashmir, India. The water samples were collected from wells, hand pumps, submersible pumps, and stored waters. The randomly obtained 14 values of radon concentration in water sources using the SMART RnDuo technique have been compared and cross checked by a RAD7 device. A good positive correlation (R = 0.88) has been observed between the two techniques. The overall value of radon concentration in various water sources has ranged from 2...
August 7, 2017: Health Physics
https://www.readbyqxmd.com/read/28795753/single-wearable-sensing-energy-device-based-on-photoelectric-biofuel-cells-for-simultaneous-analysis-of-perspiration-and-illuminance
#6
You Yu, Junfeng Zhai, Yong Xia, Shaojun Dong
Wearable electronics are essential for the construction of epidermal energy supply and portable healthcare devices. Herein, a self-powered wearable electronic device based on a photoelectric biofuel cell has been introduced for the first time to simultaneously detect the perspiration lactate and monitor the ambient illuminance depending on independent parameters. The functions of harvesting energy, detection of body function and monitoring of ambient have been merged into a single wireless sensor. This novel design may provide a wide range of smart and exciting wearable electronics...
August 10, 2017: Nanoscale
https://www.readbyqxmd.com/read/28782029/eye-motion-triggered-self-powered-mechnosensational-communication-system-using-triboelectric-nanogenerator
#7
Xianjie Pu, Hengyu Guo, Jie Chen, Xue Wang, Yi Xi, Chenguo Hu, Zhong Lin Wang
Mechnosensational human-machine interfaces (HMIs) can greatly extend communication channels between human and external devices in a natural way. The mechnosensational HMIs based on biopotential signals have been developing slowly owing to the low signal-to-noise ratio and poor stability. In eye motions, the corneal-retinal potential caused by hyperpolarization and depolarization is very weak. However, the mechanical micromotion of the skin around the corners of eyes has never been considered as a good trigger signal source...
July 2017: Science Advances
https://www.readbyqxmd.com/read/28777010/information-and-communicative-technology-use-enhances-psychological-well-being-of-older-adults-the-roles-of-age-social-connectedness-and-frailty-status
#8
Yang Fang, Anson K C Chau, Anna Wong, Helene H Fung, Jean Woo
OBJECTIVES: Information and communicative technology (ICT) use is a potential vehicle for improving the psychological well-being (PWB) of older people. We examined the roles of age, frailty, and social connectedness in the relationship between ICT use and PWB. METHOD: Telephone interviews were conducted in mid-2016 with 1201 participants aged 50 and above (55.7% female) residing in Hong Kong, China. The participants reported PWB, ICT use (frequency of using the Internet and smart devices), frailty status, contact with family, friends, and neighbors, self-rated health, subjective financial sufficiency, education level, and employment status...
August 4, 2017: Aging & Mental Health
https://www.readbyqxmd.com/read/28774521/a-comparison-of-undergraduate-clinical-ophthalmology-learning-methods-smart-phone-television-display-versus-slit-lamp-teaching-telescope
#9
Sandy Zhou Wenting, Margaret Million Samin, Srinivasan Sanjay, Kumari Neelam, Khalil Shibli, Su Chang, Jason Cheng
OBJECTIVE: To compare medical students' preference of smart phone television display (SPTD) to a slit-lamp teaching telescope (SLTT) in undergraduate clinical ophthalmology education. METHODS: This is a randomized, crossover, comparative study. Pairs of medical students were randomly assigned to 2 teaching sessions using either SPTD first followed by SLTT or in reverse order. Students were asked to give feedback on the 2 teaching devices by answering 6 questions using a numeric rating score from 1 to 10...
August 2017: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/28774135/nano-inclusions-applied-in-cement-matrix-composites-a-review
#10
REVIEW
Guillermo Bastos, Faustino Patiño-Barbeito, Faustino Patiño-Cambeiro, Julia Armesto
Research on cement-based materials is trying to exploit the synergies that nanomaterials can provide. This paper describes the findings reported in the last decade on the improvement of these materials regarding, on the one hand, their mechanical performance and, on the other hand, the new properties they provide. These features are mainly based on the electrical and chemical characteristics of nanomaterials, thus allowing cement-based elements to acquire "smart" functions. In this paper, we provide a quantitative approach to the reinforcements achieved to date...
December 16, 2016: Materials
https://www.readbyqxmd.com/read/28773914/the-effect-of-4-octyldecyloxybenzoic-acid-on-liquid-crystalline-polyurethane-composites-with-triple-shape-memory-and-self-healing-properties
#11
Jianfeng Ban, Linjiang Zhu, Shaojun Chen, Yiping Wang
To better understand shape memory materials and self-healing materials, a new series of liquid-crystalline shape memory polyurethane (LC-SMPU) composites, named SMPU-OOBAm, were successfully prepared by incorporating 4-octyldecyloxybenzoic acid (OOBA) into the PEG-based SMPU. The effect of OOBA on the structure, morphology, and properties of the material has been carefully investigated. The results demonstrate that SMPU-OOBAm has liquid crystalline properties, triple-shape memory properties, and self-healing properties...
September 21, 2016: Materials
https://www.readbyqxmd.com/read/28772571/vibration-assisted-femtosecond-laser-drilling-with-controllable-taper-angles-for-amoled-fine-metal-mask-fabrication
#12
Wonsuk Choi, Hoon Young Kim, Jin Woo Jeon, Won Seok Chang, Sung-Hak Cho
This study investigates the effect of focal plane variation using vibration in a femtosecond laser hole drilling process on Invar alloy fabrication quality for the production of fine metal masks (FMMs). FMMs are used in the red, green, blue (RGB) evaporation process in Active Matrix Organic Light-Emitting Diode (AMOLED) manufacturing. The taper angle of the hole is adjusted by attaching the objective lens to a micro-vibrator and continuously changing the focal plane position. Eight laser pulses were used to examine how the hole characteristics vary with the first focal plane's position, where the first pulse is focused at an initial position and the focal planes of subsequent pulses move downward...
February 21, 2017: Materials
https://www.readbyqxmd.com/read/28771977/smart-amphiphilic-janus-microparticles-one-step-synthesis-and-self-assembly
#13
Xue-Hui Ge, Yu-Hao Geng, Jian Chen, Jianhong Xu
Self-assembly is the process to form ordered compound structures. The theories and experiments of nano-sized Janus particles have proved that the assembled cluster structures are related to the unit number. The micro-meter sized amphiphilic Janus particles could also act as surfactants to stabilize droplets and aggregate to the clusters. When the scale order increases to the millimeter size, the connection between particles are usually shape match mechanism. Similar to the millimeter sized particles, sub-millimeter sized particles are larger and heavier that their gravity could not be ignored while the Brownian motion could be neglected...
August 3, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28769822/template-based-quality-assessment-of-the-doppler-ultrasound-signal-for-fetal-monitoring
#14
Camilo E Valderrama, Faezeh Marzbanrad, Lisa Stroux, Gari D Clifford
One dimensional Doppler Ultrasound (DUS) is a low cost method for fetal auscultation. However, accuracy of any metrics derived from the DUS signals depends on their quality, which relies heavily on operator skills. In low resource settings, where skill levels are sparse, it is important for the device to provide real time signal quality feedback to allow the re-recording of data. Retrospectively, signal quality assessment can help remove low quality recordings when processing large amounts of data. To this end, we proposed a novel template-based method, to assess DUS signal quality...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28762222/-smart-medicine-and-healthcare
#15
Yen-Chiao Angel Lu, Li-Chin Chen
Innovation and rapid technological development in Smart Medicine or Smart Healthcare impact profoundly on many aspects of healthcare. It is believed that Health Information Technology (HIT) has the potential to improve integration between care providers, reduce administrative costs and burdens, reduce medical errors, and improve care quality and patient outcomes. However, issues such as interoperability, compatibility, and integration are critical to effectively integrating hardware and software in order to fully realize the benefits of HIT...
August 2017: Hu Li za Zhi the Journal of Nursing
https://www.readbyqxmd.com/read/28762220/-the-development-of-an-intelligent-long-term-care-services-system-that-integrates-innovative-information-and-communication-technologies
#16
Ean-Wen Huang, Shwu-Fen Chiou, Mei-Lien Pan, Hua-Huan Wu, Jia-Rong Jiang, Yi-De Lu
Rapid progress in information and communication technologies and the increasing popularity of healthcare-related applications has increased interest in the topic of intelligent medical care. This topic emphasizes the use of information and communication technologies to collect and analyze a variety of data in order to provide physicians and other healthcare professionals with clinical decision support. At present, so-called smart hospitals are the focal point of most intelligent-systems development activity, with little attention currently being focused on long-term care needs...
August 2017: Hu Li za Zhi the Journal of Nursing
https://www.readbyqxmd.com/read/28760211/implantable-cardiac-monitors-in-high-risk-post-infarction-patients-with-cardiac-autonomic-dysfunction-and-moderately-reduced-left-ventricular-ejection-fraction-design-and-rationale-of-the-smart-mi-trial
#17
Wolfgang Hamm, Konstantinos D Rizas, Lukas von Stülpnagel, Nikolay Vdovin, Steffen Massberg, Stefan Kääb, Axel Bauer
BACKGROUND: Most deaths after myocardial infarction (MI) occur in patients with left ventricular ejection fraction (LVEF) >35%, for whom no specific prophylactic strategies exist. Deceleration capacity (DC) of heart rate and periodic repolarization dynamics (PRD) are noninvasive electrophysiological markers depending on the vagal and sympathetic tone. The combination of abnormal DC and/or PRD identifies a new high-risk group among postinfarction patients with LVEF 36%-50%. This new high-risk group has similar characteristics with respect to prognosis and patient numbers to those of the established high-risk group identified by LVEF ≤ 35%...
August 2017: American Heart Journal
https://www.readbyqxmd.com/read/28759714/rationally-designed-self-healing-hydrogel-electrolyte-towards-a-smart-and-sustainable-supercapacitor
#18
Jingchen Wang, Fatang Liu, Feng Tao, Qinmin Pan
Excellent self-healability and renewability are crucial for the development of wearable/flexible energy-storage devices aiming for advanced personalized electronics. However, realizing low-temperature self-healing and harmless regeneration remains a big challenge for existing wearable/flexible energy-storage devices, which is fundamentally limited by conventional polymeric electrolytes that are intrinsically neither cryo-healable nor renewable. Here we rationally design a multifunctional polymer electrolyte based on the copolymer of vinylimidazole and hydroxypropyl acrylate, which exhibits all features solving the above-mentioned limitations...
July 31, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28753023/transparent-and-highly-responsive-phototransistors-based-on-a-solution-processed-nanometers-thick-active-layer-embedding-a-high-mobility-electron-transporting-polymer-and-a-hole-trapping-molecule
#19
Lorenzo Caranzi, Giuseppina Pace, Mauro Sassi, Luca Beverina, Mario Caironi
Organic materials are suitable for light sensing devices showing unique features such as low cost, large area and flexibility. Moreover, transparent photodetectors are interesting for smart interfaces, windows and display-integrated electronics. The ease of depositing ultra-thin organic films with simple techniques enables low light absorbing active layers, resulting in the realization of transparent devices. Here, we demonstrate a strategy to obtain high efficiency organic photodetectors and phototransistors based on transparent active layers with a visible transmittance higher than 90 %...
July 28, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28752228/the-dx-af-study-a-prospective-multicenter-randomized-controlled-trial-comparing-vdd-icd-to-vvi-icd-in-detecting-sub-clinical-atrial-fibrillation-in-defibrillator-patients
#20
Mohammed Shurrab, Amir Janmohamed, Jean-François Sarrazin, Felix Ayala-Paredes, Marcio Sturmer, Randall Williams, Satish Toal, Chris Lane, Kevin E Thorpe, Jeff S Healey, Eugene Crystal
PURPOSE: Atrial fibrillation (AF) is the most common cardiac dysrhythmia. Appropriate detection of AF and early initiation of oral anticoagulation therapy are critical to reduce the risk of stroke. Patients with implantable cardioverter defibrillators (ICD) are at high risk of developing AF. The purpose of the Dx-AF study is to demonstrate that a novel single-lead VDD-ICD system (Linox smart S DX) will facilitate adequate recognition of sub-clinical AF and ultimately stroke prevention with a comparable safety profile in comparison to VVI-ICD...
July 27, 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
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