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https://www.readbyqxmd.com/read/28726386/a-smart-biointerface-with-photoswitched-functions-between-bactericidal-activity-and-bacteria-releasing-ability
#1
Ting Wei, Wenjun Zhan, Qian Yu, Hong Chen
Smart biointerfaces with capability to regulate cell-surface interactions in response to external stimuli are of great interest for both fundamental research and practical applications. Smart surfaces with "ON/OFF" switchability for a single function such as cell attachment/detachment are well-known and useful, but the ability to switch between two different functions may be seen as the next level of "smart". In this work reported, a smart supramolecular surface capable of switching functions reversibly between bactericidal activity and bacteria-releasing ability in response to UV-visible light is developed...
July 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28725530/smart-fluid-systems-the-advent-of-autonomous-liquid-robotics
#2
REVIEW
A Chiolerio, Marco B Quadrelli
Organic, inorganic or hybrid devices in the liquid state, kept in a fixed volume by surface tension or by a confining membrane that protects them from a harsh environment, could be used as biologically inspired autonomous robotic systems with unique capabilities. They could change shape according to a specific exogenous command or by means of a fully integrated adaptive system, and provide an innovative solution for many future applications, such as space exploration in extreme or otherwise challenging environments, post-disaster search and rescue in ground applications, compliant wearable devices, and even in the medical field for in vivo applications...
July 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28725528/battery-supercapacitor-hybrid-devices-recent-progress-and-future-prospects
#3
REVIEW
Wenhua Zuo, Ruizhi Li, Cheng Zhou, Yuanyuan Li, Jianlong Xia, Jinping Liu
Design and fabrication of electrochemical energy storage systems with both high energy and power densities as well as long cycling life is of great importance. As one of these systems, Battery-supercapacitor hybrid device (BSH) is typically constructed with a high-capacity battery-type electrode and a high-rate capacitive electrode, which has attracted enormous attention due to its potential applications in future electric vehicles, smart electric grids, and even miniaturized electronic/optoelectronic devices, etc...
July 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28723186/ingestible-sensors
#4
Kourosh Kalantar-Zadeh, Nam Ha, Jian Zhen Ou, Kyle J Berean
Ingestible sensing capsules are fast emerging as a critical technology that has the ability to greatly impact health, nutrition, and clinical areas. These ingestible devices are noninvasive and hence are very attractive for customers. With widespread access to smart phones connected to the Internet, the data produced by this technology can be readily seen and reviewed online, and accessed by both users and physicians. The outputs provide invaluable information to reveal the state of gut health and disorders as well as the impact of food, medical supplements, and environmental changes on the gastrointestinal tract...
April 28, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28721726/3d-printed-earable-smart-devices-for-real-time-detection-of-core-body-temperature
#5
Hiroki Ota, Minghan Chao, Yuji Gao, Eric Wu, Li-Chia Tai, Kevin Chen, Yasutomo Matsuoka, Kosuke Iwai, Hossain M Fahad, Wei Gao, Hnin Yin Yin Nyein, Liwei Lin, Ali Javey
Real-time detection of basic physiological parameters such as blood pressure and heart rate is an important target in wearable smart devices for healthcare. Among these, the core body temperature is one of the most important basic medical indicators of fever, insomnia, fatigue, metabolic functionality, and depression. However, traditional wearable temperature sensors are based upon the measurement of skin temperature, which can vary dramatically from the true core body temperature. Here, we demonstrate a three-dimensional (3D) printed wearable "earable" smart device that is designed to be worn on the ear to track core body temperature from the tympanic membrane (i...
July 19, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28720908/negative-reflecting-meta-mirrors
#6
Rui Yang, Dong Li, Dongxing Gao, Aofang Zhang, Bowei Hu, Pei Yang, Zhenya Lei, Jiacheng Li
Using the gradient phase discontinuities that meta-mirrors provide, we show that the incident wave can be reflected anomalously with a broad angle range of negative reflections. Such reversed behaviors promote the immediate applications for the planar meta-mirrors to steer the signals more arbitrarily and the convex meta-mirrors to focus and collimate electromagnetic fields. We practically implement these negative reflecting meta-mirrors through an arrangement of subwavelength ring patches and generate the desired phase distribution by also considering the incident angle...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28719707/community-triage-of-otology-patients-using-a-store-and-forward-telemedicine-device-a-feasibility-study
#7
Nishi Gupta, Neeraj Chawla, Digant Gupta, Nidhi Dhawan, Vidya R Janaki
Chronic otitis media is a major contributor to acquired hearing loss in developing countries. Developing countries such as India, with huge populations and poor health infrastructures, have always felt the shortage of trained specialists who can provide quality care to meet the enormous demand for treatment of this disease. This pilot study assessed the feasibility of empowering trained health workers equipped with ENTraview, a store-and-forward telemedicine device that integrates a camera- enabled smart phone with an otoscope...
July 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/28719614/beat-id-towards-a-computationally-low-cost-single-heartbeat-biometric-identity-check-system-based-on-electrocardiogram-wave-morphology
#8
Joana S Paiva, Duarte Dias, João P S Cunha
In recent years, safer and more reliable biometric methods have been developed. Apart from the need for enhanced security, the media and entertainment sectors have also been applying biometrics in the emerging market of user-adaptable objects/systems to make these systems more user-friendly. However, the complexity of some state-of-the-art biometric systems (e.g., iris recognition) or their high false rejection rate (e.g., fingerprint recognition) is neither compatible with the simple hardware architecture required by reduced-size devices nor the new trend of implementing smart objects within the dynamic market of the Internet of Things (IoT)...
2017: PloS One
https://www.readbyqxmd.com/read/28714884/design-and-implementation-of-a-smart-home-system-using-multisensor-data-fusion-technology
#9
Yu-Liang Hsu, Po-Huan Chou, Hsing-Cheng Chang, Shyan-Lung Lin, Shih-Chin Yang, Heng-Yi Su, Chih-Chien Chang, Yuan-Sheng Cheng, Yu-Chen Kuo
This paper aims to develop a multisensor data fusion technology-based smart home system by integrating wearable intelligent technology, artificial intelligence, and sensor fusion technology. We have developed the following three systems to create an intelligent smart home environment: (1) a wearable motion sensing device to be placed on residents' wrists and its corresponding 3D gesture recognition algorithm to implement a convenient automated household appliance control system; (2) a wearable motion sensing device mounted on a resident's feet and its indoor positioning algorithm to realize an effective indoor pedestrian navigation system for smart energy management; (3) a multisensor circuit module and an intelligent fire detection and alarm algorithm to realize a home safety and fire detection system...
July 15, 2017: Sensors
https://www.readbyqxmd.com/read/28714239/self-powered-real-time-arterial-pulse-monitoring-using-ultrathin-epidermal-piezoelectric-sensors
#10
Dae Yong Park, Daniel J Joe, Dong Hyun Kim, Hyewon Park, Jae Hyun Han, Chang Kyu Jeong, Hyelim Park, Jung Gyu Park, Boyoung Joung, Keon Jae Lee
Continuous monitoring of an arterial pulse using a pressure sensor attached on the epidermis is an important technology for detecting the early onset of cardiovascular disease and assessing personal health status. Conventional pulse sensors have the capability of detecting human biosignals, but have significant drawbacks of power consumption issues that limit sustainable operation of wearable medical devices. Here, a self-powered piezoelectric pulse sensor is demonstrated to enable in vivo measurement of radial/carotid pulse signals in near-surface arteries...
July 17, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28709856/developing-smartphone-apps-for-behavioural-studies-the-alcorisk-app-case-study
#11
Anthony Smith, Kristy de Salas, Ian Lewis, Benjamin Schüz
Advances in mobile technology and significantly increasing utilization of mobile devices such as smartphones and tablets have resulted in a paradigm shift from PC-centric computing to mobile computing. The results of careful analysis conducted of this mobile landscape indicate that there is a growing demand for smart, user-centric, situation-aware mobile software. Invariably, concomitant with this demand is the need for methodologies that can provide support the development of this type of software. In this paper, we propose a semantic framework, called the mobile situation-aware framework, which supports efficient modeling, construction, processing, management, and inference of mobile situation information...
July 11, 2017: Journal of Biomedical Informatics
https://www.readbyqxmd.com/read/28704963/challenges-in-wireless-system-integration-as-enablers-for-indoor-context-aware-environments
#12
Peio López-Iturri, Erik Aguirre, Leyre Azpilicueta, José Javier Astrain, Jesús Villandangos, Francisco Falcone
The advent of fully interactive environments within Smart Cities and Smart Regions requires the use of multiple wireless systems. In the case of user-device interaction, which finds multiple applications such as Ambient Assisted Living, Intelligent Transportation Systems or Smart Grids, among others, large amount of transceivers are employed in order to achieve anytime, anyplace and any device connectivity. The resulting combination of heterogeneous wireless network exhibits fundamental limitations derived from Coverage/Capacity relations, as a function of required Quality of Service parameters, required bit rate, energy restrictions and adaptive modulation and coding schemes...
July 12, 2017: Sensors
https://www.readbyqxmd.com/read/28701915/web-camera-based-eye-tracking-to-assess-visual-memory-on-a-visual-paired-comparison-task
#13
Nicholas T Bott, Alex Lange, Dorene Rentz, Elizabeth Buffalo, Paul Clopton, Stuart Zola
Background: Web cameras are increasingly part of the standard hardware of most smart devices. Eye movements can often provide a noninvasive "window on the brain," and the recording of eye movements using web cameras is a burgeoning area of research. Objective: This study investigated a novel methodology for administering a visual paired comparison (VPC) decisional task using a web camera.To further assess this method, we examined the correlation between a standard eye-tracking camera automated scoring procedure [obtaining images at 60 frames per second (FPS)] and a manually scored procedure using a built-in laptop web camera (obtaining images at 3 FPS)...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28698622/uniaxial-orientation-of-p3ht-film-prepared-by-soft-friction-transfer-method
#14
Masayoshi Imanishi, Daisuke Kajiya, Tomoyuki Koganezawa, Ken-Ichi Saitow
The realization of room-temperature processes is an important factor in the development of flexible electronic devices composed of organic materials. In addition, a simple and cost-effective process is essential to produce stable working devices and to enhance the performance of a smart material for flexible, wearable, or stretchable-skin devices. Here, we present a soft friction transfer method for producing aligned polymer films; a glass substrate was mechanically brushed with a velvet fabric and poly(3-hexylthiophene) (P3HT) solution was then spin-coated on the substrate...
July 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28698501/energy-harvesting-based-body-area-networks-for-smart-health
#15
Yixue Hao, Limei Peng, Huimin Lu, Mohammad Mehedi Hassan, Atif Alamri
Body area networks (BANs) are configured with a great number of ultra-low power consumption wearable devices, which constantly monitor physiological signals of the human body and thus realize intelligent monitoring. However, the collection and transfer of human body signals consume energy, and considering the comfort demand of wearable devices, both the size and the capacity of a wearable device's battery are limited. Thus, minimizing the energy consumption of wearable devices and optimizing the BAN energy efficiency is still a challenging problem...
July 10, 2017: Sensors
https://www.readbyqxmd.com/read/28696342/single-inxga1-xas-nanowire-p-si-heterojunction-based-nano-rectifier-diode
#16
Krishnendu Sarkar, Mainak Palit, Shrabani Guhathakurata, Sanatan Chattopadhyay, Pallab Banerji
Nanoscale power supply units will be indispensable for fabricating next generation smart nanoelectronic integrated circuit. Fabrication of nanoscale rectifier circuits on Si platform is required for integrating nanoelectronic devices with on-chip power supply units. In the present study, a nanorectifier diode based on a single standalone InxGa1-xAs nanowire/p-Si (111) heterojunction fabricated by metal organic chemical vapor deposition technique has been studied. The nanoheterojunction diodes have shown good rectification and fast switching characteristics...
July 11, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28695440/an-ir-sensor-based-smart-system-to-approximate-core-body-temperature
#17
Partha Pratim Ray
Herein demonstrated experiment studies two methods, namely convection and body resistance, to approximate human core body temperature. The proposed system is highly energy efficient that consumes only 165 mW power and runs on 5 VDC source. The implemented solution employs an IR thermographic sensor of industry grade along with AT Mega 328 breakout board. Ordinarily, the IR sensor is placed 1.5-30 cm away from human forehead (i.e., non-invasive) and measured the raw data in terms of skin and ambient temperature which is then converted using appropriate approximation formula to find out core body temperature...
August 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28694528/balancing-hole-and-electron-conduction-in-ambipolar-split-gate-thin-film-transistors
#18
Hocheon Yoo, Matteo Ghittorelli, Dong-Kyu Lee, Edsger C P Smits, Gerwin H Gelinck, Hyungju Ahn, Han-Koo Lee, Fabrizio Torricelli, Jae-Joon Kim
Complementary organic electronics is a key enabling technology for the development of new applications including smart ubiquitous sensors, wearable electronics, and healthcare devices. High-performance, high-functionality and reliable complementary circuits require n- and p-type thin-film transistors with balanced characteristics. Recent advancements in ambipolar organic transistors in terms of semiconductor and device engineering demonstrate the great potential of this route but, unfortunately, the actual development of ambipolar organic complementary electronics is currently hampered by the uneven electron (n-type) and hole (p-type) conduction in ambipolar organic transistors...
July 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28691215/photochromic-inorganic-organic-thermoplastic-elastomers
#19
Jiuyang Zhang, Jing Li, Mengmeng Huo, Naixu Li, Jiancheng Zhou, Tuoqi Li, Jing Jiang
Photochromic materials are an important class of "smart materials" and are broadly utilized in technological devices. However, most photochromic materials reported so far are composed of inorganic compounds that are challenging to process and suffer from poor mechanical performance, severely limiting their applications in various markets. In this paper, inorganic photochromic tungsten trioxide (WO3 ) nanocrystals are conveniently grafted with polymers to hurdle the deficiency in processability and mechanical properties...
July 10, 2017: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/28684686/an-ontology-based-context-aware-system-for-smart-homes-e-care-home
#20
Marjan Alirezaie, Jennifer Renoux, Uwe Köckemann, Annica Kristoffersson, Lars Karlsson, Eva Blomqvist, Nicolas Tsiftes, Thiemo Voigt, Amy Loutfi
Smart home environments have a significant potential to provide for long-term monitoring of users with special needs in order to promote the possibility to age at home. Such environments are typically equipped with a number of heterogeneous sensors that monitor both health and environmental parameters. This paper presents a framework called E-care@home, consisting of an IoT infrastructure, which provides information with an unambiguous, shared meaning across IoT devices, end-users, relatives, health and care professionals and organizations...
July 6, 2017: Sensors
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