keyword
MENU ▼
Read by QxMD icon Read
search

Wireless

keyword
https://www.readbyqxmd.com/read/28454130/directly-modulated-green-light-diode-pumped-solid-state-laser-for-underwater-wireless-optical-communication
#1
Jing Xu, Meiwei Kong, Aobo Lin, Yuhang Song, Jun Han, Zhiwei Xu, Bo Wu, Shiming Gao, Ning Deng
It is widely known that a diode-pumped solid-state laser (DPSSL) has very limited modulation bandwidth. Recently, we directed our attention toward the opportunities for directly modulating a DPSSL to generate high-speed green-light signals, with high power and superior beam quality, which are highly desirable in underwater wireless optical communication. The constraint imposed by the limited modulation bandwidth of a DPSSL is circumvented with the strategy of orthogonal frequency-division multiplexing and power loading...
May 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/28454038/long-term-variations-measurement-of-electromagnetic-field-exposures-in-alcal%C3%A3-de-henares-spain
#2
R Sánchez-Montero, C Alén-Cordero, P L López-Espí, J M Rigelsford, F Aguilera-Benavente, J Alpuente-Hermosilla
Electromagnetic radiowave exposure is a major concern in most countries due to possible adverse health effects. Over the last 10years, many technological changes (digital television, mobile technologies, wireless networks…) have led to variations in the electromagnetic field (EMF) levels. A large number of studies devoted to the analysis of EMF levels with personal dosimeters or computer models of the exposure of mobile stations have been conducted. However, the study of the exposure values, taking into account all the existing sources, and their evolution in a wide area, using measurements, has rarely been performed...
April 25, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28448641/detecting-glaucoma-with-a-portable-brain-computer-interface-for-objective-assessment-of-visual-function-loss
#3
Masaki Nakanishi, Yu-Te Wang, Tzyy-Ping Jung, John K Zao, Yu-Yi Chien, Alberto Diniz-Filho, Fabio B Daga, Yuan-Pin Lin, Yijun Wang, Felipe A Medeiros
Importance: The current assessment of visual field loss in diseases such as glaucoma is affected by the subjectivity of patient responses and the lack of portability of standard perimeters. Objective: To describe the development and initial validation of a portable brain-computer interface (BCI) for objectively assessing visual function loss. Design, Setting, and Participants: This case-control study involved 62 eyes of 33 patients with glaucoma and 30 eyes of 17 healthy participants...
April 27, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28448452/a-wireless-sensor-network-for-growth-environment-measurement-and-multi-band-optical-sensing-to-diagnose-tree-vigor
#4
Shinichi Kameoka, Shuhei Isoda, Atsushi Hashimoto, Ryoei Ito, Satoru Miyamoto, Genki Wada, Naoki Watanabe, Takashi Yamakami, Ken Suzuki, Takaharu Kameoka
We have tried to develop the guidance system for farmers to cultivate using various phenological indices. As the sensing part of this system, we deployed a new Wireless Sensor Network (WSN). This system uses the 920 MHz radio wave based on the Wireless Smart Utility Network that enables long-range wireless communication. In addition, the data acquired by the WSN were standardized for the advanced web service interoperability. By using these standardized data, we can create a web service that offers various kinds of phenological indices as secondary information to the farmers in the field...
April 27, 2017: Sensors
https://www.readbyqxmd.com/read/28448449/an-artificial-measurements-based-adaptive-filter-for-energy-efficient-target-tracking-via-underwater-wireless-sensor-networks
#5
Huayan Chen, Senlin Zhang, Meiqin Liu, Qunfei Zhang
We study the problem of energy-efficient target tracking in underwater wireless sensor networks (UWSNs). Since sensors of UWSNs are battery-powered, it is impracticable to replace the batteries when exhausted. This means that the battery life affects the lifetime of the whole network. In order to extend the network lifetime, it is worth reducing the energy consumption on the premise of sufficient tracking accuracy. This paper proposes an energy-efficient filter that implements the tradeoff between communication cost and tracking accuracy...
April 27, 2017: Sensors
https://www.readbyqxmd.com/read/28447624/wireless-power-transfer-to-millimeter-sized-gastrointestinal-electronics-validated-in-a-swine-model
#6
Abubakar Abid, Jonathan M O'Brien, Taylor Bensel, Cody Cleveland, Lucas Booth, Brian R Smith, Robert Langer, Giovanni Traverso
Electronic devices placed in the gastrointestinal (GI) tract for prolonged periods have the potential to transform clinical evaluation and treatment. One challenge to the deployment of such gastroresident electronics is the difficulty in powering millimeter-sized electronics devices without using batteries, which compromise biocompatibility and long-term residence. We examined the feasibility of leveraging mid-field wireless powering to transfer power from outside of the body to electronics at various locations along the GI tract...
April 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28447604/wearable-smart-sensor-systems-integrated-on-soft-contact-lenses-for-wireless-ocular-diagnostics
#7
Joohee Kim, Minji Kim, Mi-Sun Lee, Kukjoo Kim, Sangyoon Ji, Yun-Tae Kim, Jihun Park, Kyungmin Na, Kwi-Hyun Bae, Hong Kyun Kim, Franklin Bien, Chang Young Lee, Jang-Ung Park
Wearable contact lenses which can monitor physiological parameters have attracted substantial interests due to the capability of direct detection of biomarkers contained in body fluids. However, previously reported contact lens sensors can only monitor a single analyte at a time. Furthermore, such ocular contact lenses generally obstruct the field of vision of the subject. Here, we developed a multifunctional contact lens sensor that alleviates some of these limitations since it was developed on an actual ocular contact lens...
April 27, 2017: Nature Communications
https://www.readbyqxmd.com/read/28446682/smartphone-controlled-optogenetically-engineered-cells-enable-semiautomatic-glucose-homeostasis-in-diabetic-mice
#8
REVIEW
Jiawei Shao, Shuai Xue, Guiling Yu, Yuanhuan Yu, Xueping Yang, Yu Bai, Sucheng Zhu, Linfeng Yang, Jianli Yin, Yidan Wang, Shuyong Liao, Sanwei Guo, Mingqi Xie, Martin Fussenegger, Haifeng Ye
With the increasingly dominant role of smartphones in our lives, mobile health care systems integrating advanced point-of-care technologies to manage chronic diseases are gaining attention. Using a multidisciplinary design principle coupling electrical engineering, software development, and synthetic biology, we have engineered a technological infrastructure enabling the smartphone-assisted semiautomatic treatment of diabetes in mice. A custom-designed home server SmartController was programmed to process wireless signals, enabling a smartphone to regulate hormone production by optically engineered cells implanted in diabetic mice via a far-red light (FRL)-responsive optogenetic interface...
April 26, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28445434/an-adaptive-clustering-approach-based-on-minimum-travel-route-planning-for-wireless-sensor-networks-with-a-mobile-sink
#9
Jiqiang Tang, Wu Yang, Lingyun Zhu, Dong Wang, Xin Feng
In recent years, Wireless Sensor Networks with a Mobile Sink (WSN-MS) have been an active research topic due to the widespread use of mobile devices. However, how to get the balance between data delivery latency and energy consumption becomes a key issue of WSN-MS. In this paper, we study the clustering approach by jointly considering the Route planning for mobile sink and Clustering Problem (RCP) for static sensor nodes. We solve the RCP problem by using the minimum travel route clustering approach, which applies the minimum travel route of the mobile sink to guide the clustering process...
April 26, 2017: Sensors
https://www.readbyqxmd.com/read/28444862/role-of-wireless-motility-capsule-in-the-assessment-and-management-of-gastrointestinal-dysmotility-in-patients-with-diabetes-mellitus
#10
C Rouphael, Z Arora, P N Thota, R Lopez, J Santisi, C Funk, M Cline
BACKGROUND: Gastrointestinal (GI) dysmotility is common in diabetic patients. Wireless Motility Capsule (WMC) provides the transit profile of the entire GI tract in a single study. Factors affecting GI dysmotility and utility of WMC study are not clearly established in diabetic patients. Our aims were to study the pattern of GI dysmotility using WMC and evaluate the effect of glycemic control and presence of diabetic microvascular complications on motility impairment in diabetic patients...
April 26, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28441751/implementation-issues-of-adaptive-energy-detection-in-heterogeneous-wireless-networks
#11
Iker Sobron, Iñaki Eizmendi, Wallace A Martins, Paulo S R Diniz, Juan Luis Ordiales, Manuel Velez
Spectrum sensing (SS) enables the coexistence of non-coordinated heterogeneous wireless systems operating in the same band. Due to its computational simplicity, energy detection (ED) technique has been widespread employed in SS applications; nonetheless, the conventional ED may be unreliable under environmental impairments, justifying the use of ED-based variants. Assessing ED algorithms from theoretical and simulation viewpoints relies on several assumptions and simplifications which, eventually, lead to conclusions that do not necessarily meet the requirements imposed by real propagation environments...
April 23, 2017: Sensors
https://www.readbyqxmd.com/read/28441331/improving-biometric-based-authentication-schemes-with-smart-card-revocation-reissue-for-wireless-sensor-networks
#12
Jongho Moon, Donghoon Lee, Youngsook Lee, Dongho Won
User authentication in wireless sensor networks is more difficult than in traditional networks owing to sensor network characteristics such as unreliable communication, limited resources, and unattended operation. For these reasons, various authentication schemes have been proposed to provide secure and efficient communication. In 2016, Park et al. proposed a secure biometric-based authentication scheme with smart card revocation/reissue for wireless sensor networks. However, we found that their scheme was still insecure against impersonation attack, and had a problem in the smart card revocation/reissue phase...
April 25, 2017: Sensors
https://www.readbyqxmd.com/read/28437000/magnetically-guided-capsule-endoscopy
#13
REVIEW
Naveen Shamsudhin, Vladimir I Zverev, Henrik Keller, Salvador Pane, Peter W Egolf, Bradley J Nelson, Alexander M Tishin
Wireless capsule endoscopy (WCE) is a powerful tool for medical screening and diagnosis, where a small capsule is swallowed and moved by means of natural peristalsis and gravity through the human gastrointestinal (GI) tract. The camera-integrated capsule allows for visualization of the small intestine, a region which was previously inaccessible to classical flexible endoscopy. As a diagnostic tool, it allows to localize the sources of bleedings in the middle-part of the gastrointestinal tract and to identify diseases such as inflammatory bowel disease (Crohn's disease), Polyposis-Syndrome and tumors...
April 24, 2017: Medical Physics
https://www.readbyqxmd.com/read/28436914/a-time-variant-log-linear-learning-approach-to-the-set-k-cover-problem-in-wireless-sensor-networks
#14
Changhao Sun
Toward the global optimality of the SET K-COVER problem in wireless sensor networks, we view each sensor node as a rational player and propose a time variant log-linear learning algorithm (TVLLA) that relies on local information only. By defining the local utility as the normalized area covered by one node alone, we formulate the problem as a spatial potential game. The resulting optimal Nash equilibria correspond to the optimal partition. Such equilibria are obtained by designing a time varying parameter β that approaches infinity with time...
April 19, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28436841/two-wire-bus-combining-full-duplex-body-sensor-network-and-multilead-biopotential-measurements
#15
Michael Rapin, Josias Wacker, Olivier Chetelat
Classical approaches to make high-quality measurements of biopotential signals require the use of shielded or multiwire cables connecting the electrodes to a central unit in a star arrangement. As a consequence, increasing the number of leads increases cabling and connector complexity which is not only limiting the patient comfort but is also anticipated as the main limiting factor to future miniaturization and cost reduction of tomorrow's wearables. We have recently introduced a novel sensing architecture that significantly reduces the cabling complexity by eliminating shielded or multiwire cables and by allowing simple connectors thanks to a bus arrangement...
April 24, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28435776/-self-peel-off-transfer-produces-ultrathin-polyvinylidene-fluoride-based-flexible-nanodevices
#16
Yanlong Tai, Gilles Lubineau
Here, a new strategy, self-peel-off transfer, for the preparation of ultrathin flexible nanodevices made from polyvinylidene-fluoride (PVDF) is reported. In this process, a functional pattern of nanoparticles is transferred via peeling from a temporary substrate to the final PVDF film. This peeling process takes advantage of the differences in the work of adhesion between the various layers (the PVDF layer, the nanoparticle-pattern layer and the substrate layer) and of the high stresses generated by the differential thermal expansion of the layers...
April 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28433612/use-of-enteroscopy-for-the-detection-of-malignant-and-pre-malignant-lesions-of-the-small-bowel-in-complicated-celiac-disease-a-meta-analysis
#17
REVIEW
Luca Elli, Giovanni Casazza, Martina Locatelli, Federica Branchi, Francesca Ferretti, Dario Conte, Mirella Fraquelli
BACKGROUND AND AIMS: Enteroscopy (wireless, wired) is the reference standard for small-bowel (SB) diseases and it has been applied to detect SB malignancies in complicated celiac disease (CD) with heterogeneous results. The aim of this meta-analysis is to obtain a diagnostic yield (DY) by pooling the data of studies that investigated the use of enteroscopy to detect SB adverse events in CD. METHODS: We performed an online search for studies estimating the DY of wireless and wired enteroscopy in predicting the presence of SB pre-malignant and/or malignant lesions...
April 19, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28432409/innovative-treatment-modalities-for-urinary-incontinence-a-european-survey-identifying-experience-and-attitude-of-healthcare-providers
#18
Arnoud W Kastelein, Maarten F A Dicker, Brent C Opmeer, Sonia S Angles, Kaisa E Raatikainen, Joan F Alonso, Diana Tăut, Olavi Airaksinen, Linda D Cardozo, Jan-Paul W R Roovers
INTRODUCTION AND HYPOTHESIS: Urinary incontinence is a common condition in women, with a reported prevalence ranging from 25% to 51%. Of these women, an estimated 38% suffer from stress urinary incontinence (SUI). A European research consortium is investigating an innovative system based on information and communication technology for the conservative treatment of women with SUI. When introducing a new intervention, implementation barriers arise and need to be identified. Therefore, we investigated healthcare providers' experience with and attitude towards innovative care options...
April 21, 2017: International Urogynecology Journal
https://www.readbyqxmd.com/read/28428734/defining-a-staged-based-process-for-economic-and-financial-evaluations-of-mhealth-programs
#19
Amnesty E LeFevre, Samuel D Shillcutt, Sean Broomhead, Alain B Labrique, Tom Jones
Mobile and wireless technology for health (mHealth) has the potential to improve health outcomes by addressing critical health systems constraints that impede coverage, utilization, and effectiveness of health services. To date, few mHealth programs have been implemented at scale and there remains a paucity of evidence on their effectiveness and value for money. This paper aims to improve understanding among mHealth program managers and key stakeholders of how to select methods for economic evaluation (comparative analysis for determining value for money) and financial evaluation (determination of the cost of implementing an intervention, estimation of costs for sustaining or expanding an intervention, and assessment of its affordability)...
2017: Cost Effectiveness and Resource Allocation: C/E
https://www.readbyqxmd.com/read/28425955/homomorphic-filtering-for-improving-time-synchronization-in-wireless-networks
#20
José María Castillo-Secilla, José Manuel Palomares, Fernando León, Joaquín Olivares
Wireless sensor networks are used to sample the environment in a distributed way. Therefore, it is mandatory for all of the measurements to be tightly synchronized in order to guarantee that every sensor is sampling the environment at the exact same instant of time. The synchronization drift gets bigger in environments suffering from temperature variations. Thus, this work is focused on improving time synchronization under deployments with temperature variations. The working hypothesis demonstrated in this work is that the clock skew of two nodes (the ratio of the real frequencies of the oscillators) is composed of a multiplicative combination of two main components: the clock skew due to the variations between the cut of the crystal of each oscillator and the clock skew due to the different temperatures affecting the nodes...
April 20, 2017: Sensors
keyword
keyword
21594
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"