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https://www.readbyqxmd.com/read/28318904/dual-memory-neural-networks-for-modeling-cognitive-activities-of-humans-via-wearable-sensors
#1
Sang-Woo Lee, Chung-Yeon Lee, Dong-Hyun Kwak, Jung-Woo Ha, Jeonghee Kim, Byoung-Tak Zhang
Wearable devices, such as smart glasses and watches, allow for continuous recording of everyday life in a real world over an extended period of time or lifelong. This possibility helps better understand the cognitive behavior of humans in real life as well as build human-aware intelligent agents for practical purposes. However, modeling the human cognitive activity from wearable-sensor data stream is challenging because learning new information often results in loss of previously acquired information, causing a problem known as catastrophic forgetting...
February 20, 2017: Neural Networks: the Official Journal of the International Neural Network Society
https://www.readbyqxmd.com/read/28306253/double-exchange-effect-in-two-dimensional-mno2-nanomaterials
#2
Xu Peng, Yuqiao Guo, Qin Yin, Junchi Wu, Jiyin Zhao, Chengming Wang, Shi Tao, Wangsheng Chu, Changzheng Wu, Yi Xie
Electronic state transition especially for metal-insulator transition (MIT) offers physical properties useful in intriguing energy applications and smart devices. But to-date very few simple metal oxide possessed electronic transition near room-temperature. Herein, we demonstrate experimentally that chemical introduction of double-exchange in 2D nanomaterials brings a metal-insulator transition near room-temperature. In our case, valence-state regulation of 2D MnO2 nanosheet induces Mn(III)-O-Mn(IV) structure with double-exchange effect, successfully triggering near-room-temperature electronic transition with an ultrahigh negative magnetoresistance...
March 17, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28306196/flexible-sensing-electronics-for-wearable-attachable-health-monitoring
#3
REVIEW
Xuewen Wang, Zheng Liu, Ting Zhang
Wearable or attachable health monitoring smart systems are considered to be the next generation of personal portable devices for remote medicine practices. Smart flexible sensing electronics are components crucial in endowing health monitoring systems with the capability of real-time tracking of physiological signals. These signals are closely associated with body conditions, such as heart rate, wrist pulse, body temperature, blood/intraocular pressure and blood/sweat bio-information. Monitoring such physiological signals provides a convenient and non-invasive way for disease diagnoses and health assessments...
March 17, 2017: Small
https://www.readbyqxmd.com/read/28302050/implementation-of-clinical-research-trials-using-web-based-and-mobile-devices-challenges-and-solutions
#4
EDITORIAL
Roy Eagleson, Luis Altamirano-Diaz, Alex McInnis, Eva Welisch, Stefanie De Jesus, Harry Prapavessis, Meghan Rombeek, Jamie A Seabrook, Teresa Park, Kambiz Norozi
BACKGROUND: With the increasing implementation of web-based, mobile health interventions in clinical trials, it is crucial for researchers to address the security and privacy concerns of patient information according to high ethical standards. The full process of meeting these standards is often made more complicated due to the use of internet-based technology and smartphones for treatment, telecommunication, and data collection; however, this process is not well-documented in the literature...
March 17, 2017: BMC Medical Research Methodology
https://www.readbyqxmd.com/read/28301010/effect-of-sonic-vibrations-on-bond-strength-of-fiberglass-posts-bonded-to-root-dentin
#5
Amanda Mahammad Mushashe, Rodrigo Otavio Jatahy Ferreira do Amaral, Carlos Eduardo Edwards Rezende, Flares Baratto Filho, Leonardo Fernandes da Cunha, Carla Castiglia Gonzaga
Sonic vibrations may improve the bond strength and durability of fiberglass posts by improving adhesive penetration into dentin as well as the cement flow. The objective of this study was to evaluate the effect of sonic vibrations on the bond strength between fiberglass posts and root dentin using the pull-out test. Bovine roots were endodontically treated and divided randomly into four groups (n=12): Group C - conventional cementation (control); Group SA - sonic vibration (Smart Sonic Device, FGM) of the adhesive system and conventional post accommodation; SP group - conventional adhesive application and sonic vibration of the post during accommodation; and SASP - sonic vibration of the system adhesive and the post during accommodation...
January 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/28299697/monitoring-the-cellular-binding-events-with-quartz-crystal-microbalance-qcm-biosensors
#6
Abdul Rehman, Xiangqun Zeng
Quartz crystal microbalance (QCM) biosensors have been demonstrated as noninvasive and label-free tools for cell based measurements. However, the complexity of biofilms composed of cells with the associated liquid environments is preventive towards forming explicit relationship between the added mass and the change in the frequency output signal. Therefore, the protocols of interface design (surface chemistry, interaction mechanism, and data acquisition), data interpretation, and device fabrication, all need to be finely refined in order to make these biosensors prevail in real life...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28294279/smart-wearable-kevlar-based-safeguarding-electronic-textile-with-excellent-sensing-performance
#7
Sheng Wang, Shouhu Xuan, Mei Liu, Linfeng Bai, Shuaishuai Zhang, Min Sang, Wanquan Jiang, Xinglong Gong
A novel S-ST/MWCNT/Kevlar-based wearable electronic textile (WET) with enhanced safeguarding performance and force sensing ability was fabricated. Stab resistance performance tests under quasi-static and dynamic conditions show that the maximum resistance force and penetration impact energy for the WET are 18 N and 11.76 J, which represent a 90% and 50% increment with respect to the neat Kevlar, respectively. Dynamic impact resistance tests show that the WET absorbs all the impact energy. The maximum resistance force of the WET is 1052 N, which represents an improvement of about 190% with respect to neat Kevlar...
March 15, 2017: Soft Matter
https://www.readbyqxmd.com/read/28292673/bioresponsive-transcutaneous-patches
#8
REVIEW
Jicheng Yu, Yuqi Zhang, Anna R Kahkoska, Zhen Gu
Transdermal drug delivery systems that utilize transcutaneous patches of arrayed microneedles have attracted increasing interest in medical practice as an alternative method to hypodermic injection. Over the past ten years, research has focused on leveraging physiological signals associated with diseases or skin-specific tissues to create bioresponsive patches that release drug directly in response to an internally-generated stimulus. This review surveys the recent advances in the development and use of bioresponsive transcutaneous patches for on-demand smart and precise drug delivery, exploiting different physiological signals including pH, serum glucose levels, and enzyme activity...
March 11, 2017: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/28290720/comparison-of-heart-rate-variability-recording-with-smart-phone-photoplethysmographic-polar-h7-chest-strap-and-electrocardiogram-methods
#9
Daniel J Plews, Ben Scott, Marco Altini, Matt Wood, Andrew E Kilding, Paul B Laursen
PURPOSE: To establish the validity of smartphone photoplethysmography (PPG) and heart rate sensor in the measurement of heart rate variability (HRV). METHODS: 29 healthy subjects were measured at rest during 5 min of guided breathing (GB) and normal breathing (NB) using Smartphone PPG, heart rate chest strap and electrocardiography (ECG). The root mean sum of the squared differences between R-R intervals (rMSSD) was determined from each device. RESULTS: Compared to ECG, the technical error of estimate (TEE) was acceptable for all conditions (average TEE CV% (90% CI) = 6...
March 14, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28285203/flexible-heartbeat-sensor-for-wearable-device
#10
Yeon Hwa Kwak, Wonhyo Kim, Kwang Bum Park, Kunnyun Kim, Sungkyu Seo
We demonstrate a flexible strain-gauge sensor and its use in a wearable application for heart rate detection. This polymer-based strain-gauge sensor was fabricated using a double-sided fabrication method with polymer and metal, i.e., polyimide and nickel-chrome. The fabrication process for this strain-gauge sensor is compatible with the conventional flexible printed circuit board (FPCB) processes facilitating its commercialization. The fabricated sensor showed a linear relation for an applied normal force of more than 930 kPa, with a minimum detectable force of 6...
March 8, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28279921/computational-smart-polymer-design-based-on-elastin-protein-mutability
#11
Anna Tarakanova, Wenwen Huang, Anthony S Weiss, David L Kaplan, Markus J Buehler
Soluble elastin-like peptides (ELPs) can be engineered into a range of physical forms, from hydrogels and scaffolds to fibers and artificial tissues, finding numerous applications in medicine and engineering as "smart polymers". Elastin-like peptides are attractive candidates as a platform for novel biomaterial design because they exhibit a highly tunable response spectrum, with reversible phase transition capabilities. Here, we report the design of the first virtual library of elastin-like protein models using methods for enhanced sampling to study the effect of peptide chemistry, chain length, and salt concentration on the structural transitions of ELPs, exposing associated molecular mechanisms...
January 31, 2017: Biomaterials
https://www.readbyqxmd.com/read/28277248/electrochemical-biosensors-for-early-stage-zika-diagnostics
#12
REVIEW
Ajeet Kaushik, Sneham Tiwari, Rahul D Jayant, Arti Vashist, Roozbeh Nikkhah-Moshaie, Nazira El-Hage, Madhavan Nair
Health agencies have declared the recent Zika virus (ZIKV) infection an epidemic and a public health emergency of global concern due to its association with microcephaly and serious neurological disorders. The unavailability of effective drugs, vaccines, and diagnostic tools increases the demand for efficient analytical devices to detect ZIKV infection. However, high costs, longer diagnostic times, and stringent expertise requirements limit the utility of reverse transcriptase-PCR methods for rapid diagnostics...
October 26, 2016: Trends in Biotechnology
https://www.readbyqxmd.com/read/28275736/sequential-self-folding-of-polymer-sheets
#13
Ying Liu, Brandi Shaw, Michael D Dickey, Jan Genzer
Shape plays an important role in defining the function of materials, particularly those found in nature. Several strategies exist to program materials to change from one shape to another; however, few can temporally and spatially control the shape. Programming the sequence of shape transformation with temporal control has been driven by the desire to generate complex shapes with high yield and to create multiple shapes from the same starting material. This paper demonstrates a markedly simple strategy for programmed self-folding of two-dimensional (2D) polymer sheets into 3D objects in a sequential manner using external light...
March 2017: Science Advances
https://www.readbyqxmd.com/read/28273052/uniform-implantation-of-cnts-on-total-activated-carbon-surfaces-a-smart-engineering-protocol-for-commercial-supercapacitor-applications
#14
Jian Jiang, Linpo Li, Yani Liu, Siyuan Liu, Maowen Xu, Jianhui Zhu
The main obstacles to building better supercapacitors are still trade-offs between energy and power parameters. To promote commercial supercapacitor behaviors, proper optimization toward electrode configurations/architectures may be a feasible and effective way. We herein propose a smart and reliable electrode engineering protocol, by in situ implantation of carbon nanotubes (CNTs) on total activated carbon (AC) surfaces via a mild chemical vapor deposition process at ∼550 °C, using nickel nitrate hydroxide (NNH) thin films and waste ethanol solvents as the catalyst and carbon sources, respectively...
April 7, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28272315/a-segment-based-trajectory-similarity-measure-in-the-urban-transportation-systems
#15
Yingchi Mao, Haishi Zhong, Xianjian Xiao, Xiaofang Li
With the rapid spread of built-in GPS handheld smart devices, the trajectory data from GPS sensors has grown explosively. Trajectory data has spatio-temporal characteristics and rich information. Using trajectory data processing techniques can mine the patterns of human activities and the moving patterns of vehicles in the intelligent transportation systems. A trajectory similarity measure is one of the most important issues in trajectory data mining (clustering, classification, frequent pattern mining, etc...
March 6, 2017: Sensors
https://www.readbyqxmd.com/read/28271882/rate-tunable-stepwise-two-photon-gated-photoresponsive-systems-employing-a-synergetic-interaction-between-transient-biradical-units
#16
Katsuya Mutoh, Yoichi Kobayashi, Takuya Yamane, Takahiro Ikezawa, Jiro Abe
The cooperative interaction between photons and molecules, recently termed as "photosynergetic" effect, is crucial to de-velop advanced photofunctional materials beyond a one-photon reaction of a single chromophore. The two-photon absorp-tion is one of the attractive processes for the efficient utilization of photons. Especially, the nonlinear response of the two-photon absorption process is of interest not only to realize temporal and spatial control of reactions but also to develop the rewritable optical memory media and smart optical devices responding to intensity of light...
March 8, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28270382/evaluating-the-consistency-of-current-mainstream-wearable-devices-in-health-monitoring-a-comparison-under-free-living-conditions
#17
Dong Wen, Xingting Zhang, Xingyu Liu, Jianbo Lei
BACKGROUND: Wearable devices are gaining increasing market attention; however, the monitoring accuracy and consistency of the devices remains unknown. OBJECTIVE: The purpose of this study was to assess the consistency of the monitoring measurements of the latest wearable devices in the state of normal activities to provide advice to the industry and support to consumers in making purchasing choices. METHODS: Ten pieces of representative wearable devices (2 smart watches, 4 smart bracelets of Chinese brands or foreign brands, and 4 mobile phone apps) were selected, and 5 subjects were employed to simultaneously use all the devices and the apps...
March 7, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28269691/smartstuff-a-case-study-of-a-smart-water-bottle
#18
Emil Jovanov, Vindhya R Nallathimmareddygari, Jonathan E Pryor
The rapid growth of Internet of Things (IoT) and miniature wearable biosensors have generated new opportunities for personalized eHealth and mHealth services. Smart objects equipped with physiological sensors can provide robust monitoring of activities of daily living and context for wearable physiological sensors. We present a case study of an intelligent water bottle that can precisely measure the amount of liquid in the bottle, monitor activity using inertial sensors, and physiological parameters using a touch and photoplethysmographic sensor...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269562/polyimide-based-magnetic-microactuators-for-biofouling-removal
#19
Qi Yang, Tran Nguyen, Chunan Liu, Jacob Miller, Jeffrey F Rhoads, Jacqueline Linnes, Hyowon Lee
Here we report on the development of novel polyimide-based flexible magnetic actuators for improving hydrocephalus shunts. The static and dynamic mechanical responses of the thin-film magnetic microdevices were quantitatively measured. The bacteria-removing capabilities of the microfabricated devices were also evaluated. Although additional evaluations are necessary, the preliminary results show promising potential for combatting bacteria-induced biofouling. Lastly, the thin-film microdevices are integrated into a single-pore silicone catheter to demonstrate a proof-of-concept, MEMS-enabled self-clearing, smart catheter...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269383/design-and-prototyping-of-a-wristband-type-wireless-photoplethysmographic-device-for-heart-rate-variability-signal-analysis
#20
M Ghamari, C Soltanpur, S Cabrera, R Romero, R Martinek, H Nazeran
Heart Rate Variability (HRV) signal analysis provides a quantitative marker of the Autonomic Nervous System (ANS) function. A wristband-type wireless photoplethysmographic (PPG) device was custom-designed to collect and analyze the arterial pulse in the wrist. The proposed device is comprised of an optical sensor to monitor arterial pulse, a signal conditioning unit to filter and amplify the analog PPG signal, a microcontroller to digitize the analog PPG signal, and a Bluetooth module to transfer the data to a smart device...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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