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Smart device

Dong Ju Kim, Chi Yeon Lim, Namyi Gu, Choul Yong Park
PURPOSE: In the present study, the visual discomfort induced by smart mobile devices was assessed in normal and healthy adults. METHODS: Fifty-nine volunteers (age, 38.16 ± 10.23 years; male : female = 19 : 40) were exposed to tablet computer screen stimuli (iPad Air, Apple Inc.) for 1 hour. Participants watched a movie or played a computer game on the tablet computer. Visual fatigue and discomfort were assessed using an asthenopia questionnaire, tear film break-up time, and total ocular wavefront aberration before and after viewing smart mobile devices...
July 18, 2017: Korean Journal of Ophthalmology: KJO
Angelo Cangialosi, ChangKyu Yoon, Jiayu Liu, Qi Huang, Jingkai Guo, Thao D Nguyen, David H Gracias, Rebecca Schulman
Shape-changing hydrogels that can bend, twist, or actuate in response to external stimuli are critical to soft robots, programmable matter, and smart medicine. Shape change in hydrogels has been induced by global cues, including temperature, light, or pH. Here we demonstrate that specific DNA molecules can induce 100-fold volumetric hydrogel expansion by successive extension of cross-links. We photopattern up to centimeter-sized gels containing multiple domains that undergo different shape changes in response to different DNA sequences...
September 15, 2017: Science
Gong Zhang, Zhang Wu, Huijuan Liu, Qinghua Ji, Jiuhui Qu, Jinghong Li
Inspired by living systems, the construction of smart devices that can self-heal in response to structural damage is a promising technology for maintaining the high activity and stability of catalysts during heterocatalytic reactions. Here this study demonstrates an ingenious platform that enabled efficient persulfate (PS) activation for contaminant degradation via integrating a catalyst with photoactuation regeneration. Under irradiation, it is unambiguously confirmed that the collective properties of a tailored FeOOH@C3 N4 catalyst permit interfacial photoexcited electron transport from the photocatalyst substrate to needle-shaped FeOOH...
September 12, 2017: Small
Ian Coffman, Helaine E Resnick, Corinna E Lathan
BACKGROUND: Caregivers of persons with dementia/Alzheimer's disease (AD) experience considerable physical and psychological burdens associated with their caregiving role. Although mobile technologies have the potential to deliver caregiver supports, it is necessary to demonstrate that caregivers in need of these supports are technology-enabled, that they can be identified and accessed, and that they experience the same unfavorable mental health outcomes characteristic of the broader caregiving population...
2017: MHealth
Daisuke Mitsuno, Koichi Ueda, Tomoki Itamiya, Takashi Nuri, Yuki Otsuki
BACKGROUND: Augmented reality (AR) technology that can combine computer-generated images with a real scene has been reported in the medical field recently. We devised the AR system for evaluation of improvements of the body surface, which is important for plastic surgery. METHODS: We constructed an AR system that is easy to modify by combining existing devices and free software. We superimposed the 3-dimensional images of the body surface and the bone (obtained from VECTRA H1 and CT) onto the actual surgical field by Moverio BT-200 smart glasses and evaluated improvements of the body surface in 8 cases...
August 2017: Plastic and Reconstructive Surgery. Global Open
Kee-Sun Sohn, Jiyong Chung, Min-Young Cho, Suman Timilsina, Woon Bae Park, Myungho Pyo, Namsoo Shin, Keemin Sohn, Ji Sik Kim
Complicated structures consisting of multi-layers with a multi-modal array of device components, i.e., so-called patterned multi-layers, and their corresponding circuit designs for signal readout and addressing are used to achieve a macroscale electronic skin (e-skin). In contrast to this common approach, we realized an extremely simple macroscale e-skin only by employing a single-layered piezoresistive MWCNT-PDMS composite film with neither nano-, micro-, nor macro-patterns. It is the deep machine learning that made it possible to let such a simple bulky material play the role of a smart sensory device...
September 11, 2017: Scientific Reports
Sen Lin, Xiaopeng Bai, Haiyang Wang, Haolun Wang, Jianan Song, Kai Huang, Chang Wang, Ning Wang, Bo Li, Ming Lei, Hui Wu
Electrochromic smart windows (ECSWs) are considered as the most promising alternative to traditional dimming devices. However, the electrode technology in ECSWs remains stagnant, wherein inflexible indium tin oxide and fluorine-doped tin oxide are the main materials being used. Although various complicated production methods, such as high-temperature calcination and sputtering, have been reported, the mass production of flexible and transparent electrodes remains challenging. Here, a nonheated roll-to-roll process is developed for the continuous production of flexible, extralarge, and transparent silver nanofiber (AgNF) network electrodes...
September 11, 2017: Advanced Materials
Kisuk Choi, Chun Yan Gao, Jae Do Nam, Hyoung Jin Choi
Cellulose particles, their derivatives and composites have special environmentally benign features and are abundant in nature with their various applications. This review paper introduces the essential properties of several types of cellulose and their derivatives obtained from various source materials, and their use in electro-responsive electrorheological (ER) suspensions, which are smart fluid systems that are actively responsive under applied electric fields, while, at zero electric field, ER fluids retain a liquid-like state...
September 10, 2017: Materials
Trent Aland, Ekta Jhala, Tanya Kairn, Jamie V Trapp
In this work, a methodology for using a smartphone camera, in conjunction with a light-tight box operating in reflective transmission mode, is investigated as a proof of concept for use as a film dosimetry system. An imaging system was designed to allow the camera of a smartphone to be used as a pseudo densitometer. Ten pieces of Gafchromic EBT3 film were irradiated to doses up to 16.89 Gy and used to evaluate the effects of reproducibility and orientation, as well as the ability to create an accurate dose response curve for the smartphone based dosimetry system, using all three colour channels...
September 8, 2017: Physics in Medicine and Biology
Ying Zhong, Zhisheng Chai, Zhimin Liang, Peng Sun, Weiguang Xie, Chuanxi Zhao, Wenjie Mai
Due to the popularity of the smart electronics, multi-functional energy storage devices, especially the electrochromic supercapacitors (SCs), have attracted tremendous research interests. Herein, a solid-state electrochromic asymmetric SC (ASC) window is designed and fabricated by introducing WO3 and polyaniline (PANI) as the negative and positive electrodes, respectively. The two complementary materials contribute to the outstanding electrochemical and electrochromic performances of the fabricated device. With an operating voltage window of 1...
September 8, 2017: ACS Applied Materials & Interfaces
Muhammad Ehatisham-Ul-Haq, Muhammad Awais Azam, Jonathan Loo, Kai Shuang, Syed Islam, Usman Naeem, Yasar Amin
Smartphones are context-aware devices that provide a compelling platform for ubiquitous computing and assist users in accomplishing many of their routine tasks anytime and anywhere, such as sending and receiving emails. The nature of tasks conducted with these devices has evolved with the exponential increase in the sensing and computing capabilities of a smartphone. Due to the ease of use and convenience, many users tend to store their private data, such as personal identifiers and bank account details, on their smartphone...
September 6, 2017: Sensors
Bethany Hooper, Michele Verdonck, Delena Amsters, Michelle Myburg, Emily Allan
BACKGROUND: Environmental control systems (ECS) are devices that enable people with severe physical limitations to independently control household appliances. Recent advancements in the area of environmental control technology have led to the development of ECS that can be controlled through mainstream smart-devices. There is limited research on ECS within Australia and no known research addressing smart-device ECS. The current study sought to explore users' experiences with smart-device ECS within Australia...
September 6, 2017: Disability and Rehabilitation. Assistive Technology
Liangmin Jin, Juan Tao, Rongrong Bao, Li Sun, Caofeng Pan
The triboelectric nanogenerator (TENG) has great potential in the field of self-powered sensor fabrication. Recently, smart electronic devices and movement monitoring sensors have attracted the attention of scientists because of their application in the field of artificial intelligence. In this article, a TENG finger movement monitoring, self-powered sensor has been designed and analysed. Under finger movements, the TENG realizes the contact and separation to convert the mechanical energy into electrical signal...
September 5, 2017: Scientific Reports
Qi Lu, Qiuhan Tang, Zhonghui Chen, Shilong Zhao, Guangyan Qing, Taolei Sun
In eukaryotic cells, ion channels, which ubiquitously present as polypeptides or proteins, usually regulate the ion transport across biological membranes by conformational switching of the channel proteins in response to the binding of diverse signaling molecules (e.g., inositol phosphate, abbreviated to InsP). To mimic the gating behaviors of natural Ca(2+) channels manipulated by InsPs, a smart poly[(N-isopropylacrylamide-co-4-(3-acryloylthioureido) benzoic acid)0.2] (denoted as PNI-co-ATBA0.2) was integrated onto a porous anodic alumina (PAA) membrane, building an InsP-actuated nanochannel system...
September 13, 2017: ACS Applied Materials & Interfaces
Ricardo Langner, Tom Horak, Raimund Dachselt
We present VISTILES, a conceptual framework that uses a set of mobile devices to distribute and coordinate visualization views for the exploration of multivariate data. In contrast to desktop-based interfaces for information visualization, mobile devices offer the potential to provide a dynamic and user-defined interface supporting co-located collaborative data exploration with different individual workflows. As part of our framework, we contribute concepts that enable users to interact with coordinated & multiple views (CMV) that are distributed across several mobile devices...
August 29, 2017: IEEE Transactions on Visualization and Computer Graphics
Eduardo Coutiño-Gonzalez, Wouter Baekelant, Julian A Steele, Cheol Woong Kim, Maarten B J Roeffaers, Johan Hofkens
Interest for functional silver clusters (Ag-CLs) has rapidly grown over years due to large advances in the field of nanoscale fabrication and materials science. The continuous development of strategies to fabricate small-scale silver clusters, together with their interesting physicochemical properties (molecule-like discrete energy levels, for example), make them very attractive for a wide variety of applied research fields, from biotechnology and the environmental sciences to fundamental chemistry and physics...
September 1, 2017: Accounts of Chemical Research
Hongqiu Liang, Xin Zhang, Huihui Sun, Han Jin, Xiaowei Zhang, Qinghui Jin, Jie Zou, Hossam Haick, Jiawen Jian
Inadequate detection limit and unsatisfactory discrimination features remain the challenging issues for the widely applied electrochemical gas sensors. Quite recently, we confirmed that light-regulated electrochemical reaction significantly enhanced the electrocatalytic activity, thereby, can potentially extend the detection limit to parts per billion (ppb) level. Nevertheless, impact of the light-regulated electrochemical reaction on response selectivity is less discussed. Herein, we systematically report on the effect of illumination on discrimination features via designing & fabricating a light-regulated electrochemical sensor array...
September 1, 2017: ACS Sensors
A Uhart, J B Ledeuil, B Pecquenard, F Le Cras, M Proust, H Martinez
The current sustained demand for "smart" and connected devices has created a need for more miniaturized power sources, hence for microbatteries. Lithium-ion or "lithium-free" all-solid-state thin-film batteries are adapted solutions to this issue. The capability to carry out spatially resolved chemical analysis is fundamental for the understanding of the operation in an all-solid-state microbattery. Classically cumbersome and not straightforward techniques as TEM/STEM/EELS and FIB preparation methods could be used to address this issue...
September 12, 2017: ACS Applied Materials & Interfaces
Bastiaan D Ippel, Patricia Y W Dankers
Biomaterials with excellent blood-compatibility are needed for applications in vascular replacement therapies, such as vascular grafts, heart valves and stents, and in extracorporeal devices such as hemodialysis machines and blood-storage bags. The modification of materials that are being used for blood-contacting devices has advanced from passive surface modifications to the design of more complex, smart biomaterials that respond to relevant stimuli from blood to counteract coagulation. Logically, the main source of inspiration for the design of new biomaterials has been the endogenous endothelium...
August 25, 2017: Advanced Healthcare Materials
Ward van der Stam, Solrun Gudjonsdottir, Wiel H Evers, Arjan J Houtepen
Control over the doping density in copper sulfide nanocrystals is of great importance and determines its use in optoelectronic applications such as NIR optical switches and photovoltaic devices. Here, we demonstrate that we can reversibly control the hole carrier density (varying from >10^22 cm-3 to intrinsic) in copper sulfide nanocrystals by electrochemical methods. We can control the type of charge injection, i.e. capacitive charging or ion intercalation, via the choice of the charge compensating cation (e...
August 25, 2017: Journal of the American Chemical Society
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