keyword
MENU ▼
Read by QxMD icon Read
search

Mobility device

keyword
https://www.readbyqxmd.com/read/28925923/diverse-carrier-mobility-of-monolayer-bnc-sub-x-sub-a-combined-density-functional-theory-and-boltzmann-transport-theory-study
#1
Tao Wu, Kaiming Deng, Wei-Qiao Deng, Ruifeng Lu
BNCX monolayer as a kind of two-dimensional material has numerous chemical atomic ratios and arrangements with different electronic structures. Via calculations on the basis of density functional theory and Boltzmann transport theory under deformation potential approximation, the band structures and carrier mobilities of BNCX (x=1,2,3,4) nanosheets are systematically investigated. The calculated results show that BNC2-1 is a material with very small band gap (0.02 eV) among all the structures while other BNCX monolayers are semiconductors with band gap ranging from 0...
September 19, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28925418/mhealth-application-areas-and-technology-combinations-a-comparison-of-literature-from-high-and-low-middle-income-countries
#2
Haitham Abaza, Michael Marschollek
BACKGROUND: With the continuous and enormous spread of mobile technologies, mHealth has evolved as a new subfield of eHealth. While eHealth is broadly focused on information and communication technologies, mHealth seeks to explore more into mobile devices and wireless communication. Since mobile phone penetration has exceeded other infrastructure in low and middle-income countries (LMICs), mHealth is seen as a promising component to provide pervasive and patient-centered care. OBJECTIVES: The aim of our research work for this paper is to examine the mHealth literature to identify application areas, target diseases, and mHealth service and technology types that are most appropriate for LMICs...
August 8, 2017: Methods of Information in Medicine
https://www.readbyqxmd.com/read/28925264/space-environment-effects-on-flexible-low-voltage-organic-thin-film-transistors
#3
Laura Basiricò, Alberto Francesco Basile, Piero Cosseddu, Simone Gerardin, Tobias Cramer, Marta Bagatin, Andrea Ciavatti, Alessandro Paccagnella, Annalisa Bonfiglio, Beatrice Fraboni
Organic electronic devices fabricated on flexible substrates are promising candidates for applications in environments where flexible, light-weight and radiation hard materials are required. In this work, device parameters as threshold voltage, charge mobility and trap density of 13-Bis(triisopropylsilylethynyl)pentacene (TIPS-pentacene) based OTFTs have been monitored performing electrical measurements before and after irradiation by high-energy protons. The observed reduction of charge carrier mobility following irradiation can be only partially ascribed to the increased trap density...
September 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28924327/direct-comparison-of-time-resolved-terahertz-spectroscopy-and-hall-van-der-pauw-methods-for-measurement-of-carrier-conductivity-and-mobility-in-bulk-semiconductors
#4
Brian G Alberding, W Robert Thurber, Edwin J Heilweil
Charge carrier conductivity and mobility for various semiconductor wafers and crystals were measured by ultrafast above bandgap, optically excited Time-Resolved Terahertz Spectroscopy (TRTS) and Hall Van der Pauw contact methods to directly compare these approaches and validate the use of the non-contact optical approach for future materials and in-situ device analyses. Undoped and doped silicon (Si) wafers with resistances varying over six orders of magnitude were selected as model systems since contact Hall measurements are reliably made on this material...
July 2017: Journal of the Optical Society of America. B, Optical Physics
https://www.readbyqxmd.com/read/28924301/epitaxial-graphene-homogeneity-and-quantum-hall-effect-in-millimeter-scale-devices
#5
Yanfei Yang, Guangjun Cheng, Patrick Mende, Irene G Calizo, Randall M Feenstra, Chiashain Chuang, Chieh-Wen Liu, Chieh-I Liu, George R Jones, Angela R Hight Walker, Randolph E Elmquist
Quantized magnetotransport is observed in 5.6 × 5.6 mm(2) epitaxial graphene devices, grown using highly constrained sublimation on the Si-face of SiC(0001) at high temperature (1900 °C). The precise quantized Hall resistance of [Formula: see text] is maintained up to record level of critical current Ixx = 0.72 mA at T = 3.1 K and 9 T in a device where Raman microscopy reveals low and homogeneous strain. Adsorption-induced molecular doping in a second device reduced the carrier concentration close to the Dirac point (n ≈ 10(10) cm(-2)), where mobility of 18760 cm(2)/V is measured over an area of 10 mm(2)...
May 2017: Carbon
https://www.readbyqxmd.com/read/28922953/high-technology-augmentative-and-alternative-communication-for-individuals-with-intellectual-and-developmental-disabilities-and-complex-communication-needs-a-meta-analysis
#6
Jennifer B Ganz, Kristi L Morin, Margaret J Foster, Kimberly J Vannest, Derya Genç Tosun, Emily V Gregori, Stephanie L Gerow
The use of mobile technology is ubiquitous in modern society and is rapidly increasing in novel use. The use of mobile devices and software applications ("apps") as augmentative and alternative communication (AAC) is rapidly expanding in the community, and this is also reflected in the research literature. This article reports the social-communication outcome results of a meta-analysis of single-case experimental research on the use of high-tech AAC, including mobile devices, by individuals with intellectual and developmental disabilities, including autism spectrum disorder...
September 19, 2017: Augmentative and Alternative Communication: AAC
https://www.readbyqxmd.com/read/28922878/development-and-validation-of-a-mobile-device-based-external-ventricular-drain-simulator
#7
Peter J Morone, Kimon Bekelis, Brandon K Root, Robert J Singer
BACKGROUND: Multiple external ventricular drain (EVD) simulators have been created, yet their cost, bulky size, and nonreusable components limit their accessibility to residency programs. OBJECTIVE: To create and validate an animated EVD simulator that is accessible on a mobile device. METHODS: We developed a mobile-based EVD simulator that is compatible with iOS (Apple Inc., Cupertino, California) and Android-based devices (Google, Mountain View, California) and can be downloaded from the Apple App and Google Play Store...
October 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28922337/role-of-the-internet-as-an-information-resource-before-anaesthesia-consultation-a-french-prospective-multicentre-survey
#8
Bastian Nucci, Pierre-Geraud Claret, Gilles Leclerc, Arnaud Chaumeron, Philippe Grillo, Clément Buleon, Vincent Leprince, Mathieu Raux, Vincent Minville, Emmanuel Futier, Jean-Yves Lefrant, Philippe Cuvillon
BACKGROUND: Use of the internet as an information search tool has increased dramatically. Our study assessed preoperative use of the internet by patients to search for information regarding anaesthesia, surgery, pain or outcomes. OBJECTIVE(S): The aim of this study was to test whether patients used the internet prior to surgery and what kinds of information they looked for (anaesthetic technique, pain, adverse events, outcomes and surgery). Correlation between patient age and information sought about surgery from the internet was also explored...
September 16, 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/28922132/design-of-secure-and-lightweight-authentication-protocol-for-wearable-devices-environment
#9
Ashok Kumar Das, Mohammad Wazid, Neeraj Kumar, Muhammad Khurram Khan, Kim-Kwang Raymond Choo, YoungHo Park
Wearable devices are used in various applications to collect information including step information, sleeping cycles, workout statistics, and health related information. Due to the nature and richness of the data collected by such devices, it is important to ensure the security of the collected data. This paper presents a new lightweight authentication scheme suitable for wearable device deployment. The scheme allows a user to mutually authenticate his/her wearable device(s) and the mobile terminal (e.g., Android and iOS device) and establish a session key among these devices (worn and carried by the same user) for secure communication between the wearable device and the mobile terminal...
September 18, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28921874/polaronic-charge-carrier-lattice-interaction-in-lead-halide-perovskites
#10
Christoph Wolf, Young-Hoon Kim, Himchan Cho, Tae-Woo Lee
Almost ten years after the renaissance of the popular perovskite-type semiconductors based on lead-salts with general formula AMX3 (A=organic or inorganic cation, M=divalent metal, X=halide), many facets of photophysics continue to puzzle researchers. In this review, we shed some light on the low mobilities of charge carriers in lead-halide perovskites with special focus on the lattice properties at non-zero temperature. The polar and soft lattice leads to pronounced electron-phonon coupling, limiting carrier mobility and retarding recombination...
September 18, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28920963/tuning-a-circular-p-n-junction-in-graphene-from-quantum-confinement-to-optical-guiding
#11
Yuhang Jiang, Jinhai Mao, Dean Moldovan, Massoud Ramezani Masir, Guohong Li, Kenji Watanabe, Takashi Taniguchi, Francois M Peeters, Eva Y Andrei
The photon-like propagation of the Dirac electrons in graphene, together with its record-high electronic mobility, can lead to applications based on ultrafast electronic response and low dissipation. However, the chiral nature of the charge carriers that is responsible for the high mobility also makes it difficult to control their motion and prevents electronic switching. Here, we show how to manipulate the charge carriers by using a circular p-n junction whose size can be continuously tuned from the nanometre to the micrometre scale...
September 18, 2017: Nature Nanotechnology
https://www.readbyqxmd.com/read/28920939/imaging-and-tuning-polarity-at-srtio3-domain%C3%A2-walls
#12
Yiftach Frenkel, Noam Haham, Yishai Shperber, Christopher Bell, Yanwu Xie, Zhuoyu Chen, Yasuyuki Hikita, Harold Y Hwang, Ekhard K H Salje, Beena Kalisky
Electrostatic fields tune the ground state of interfaces between complex oxide materials. Electronic properties, such as conductivity and superconductivity, can be tuned and then used to create and control circuit elements and gate-defined devices. Here we show that naturally occurring twin boundaries, with properties that are different from their surrounding bulk, can tune the LaAlO3/SrTiO3 interface 2DEG at the nanoscale. In particular, SrTiO3 domain boundaries have the unusual distinction of remaining highly mobile down to low temperatures, and were recently suggested to be polar...
September 18, 2017: Nature Materials
https://www.readbyqxmd.com/read/28920907/energy-analysis-of-decoders-for-rakeness-based-compressed-sensing-of-ecg-signals
#13
Fabio Pareschi, Mauro Mangia, Daniele Bortolotti, Andrea Bartolini, Luca Benini, Riccardo Rovatti, Gianluca Setti
In recent years, compressed sensing (CS) has proved to be effective in lowering the power consumption of sensing nodes in biomedical signal processing devices. This is due to the fact the CS is capable of reducing the amount of data to be transmitted to ensure correct reconstruction of the acquired waveforms. Rakeness-based CS has been introduced to further reduce the amount of transmitted data by exploiting the uneven distribution to the sensed signal energy. Yet, so far no thorough analysis exists on the impact of its adoption on CS decoder performance...
September 13, 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28920567/electronic-devices-for-cognitive-impairment-screening-a-systematic-literature-review
#14
J Antonio García-Casal, Manuel Franco-Martín, M Victoria Perea-Bartolomé, J Miguel Toribio-Guzmán, Carlos García-Moja, Miguel Goñi-Imizcoz, Emese Csipke
OBJECTIVES: The reduction in cognitive decline depends on timely diagnosis. The aim of this systematic review was to analyze the current available information and communication technologies-based instruments for cognitive decline early screening and detection in terms of usability, validity, and reliability. METHODS: Electronic searches identified 1,785 articles of which thirty-four met the inclusion criteria and were grouped according to their main purpose into test batteries, measures of isolated tasks, behavioral measures, and diagnostic tools...
September 18, 2017: International Journal of Technology Assessment in Health Care
https://www.readbyqxmd.com/read/28920505/learning-to-use-a-rear-mounted-power-assist-for-manual-wheelchairs
#15
Bonita Sawatzky, W Ben Mortenson, Stephanie Wong
OBJECTIVES: 1) To investigate how much training manual wheelchair users perceive is required to learn to use a rear-mounted power assist safely and confidently. 2) To evaluate how the power assist affected wheelchair users' ability to negotiate a standardized obstacle course, wheelchair skills capacity and wheelchair mobility confidence. METHOD: This study used a pre- versus post-test intervention design. Outcome measures included a standardized obstacle course, and modified versions of the Wheelchair Skills Test 4...
September 18, 2017: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/28920438/conduction-mechanisms-at-interface-of-aln-sin-dielectric-stacks-with-algan-gan-heterostructures-for-normally-off-high-electron-mobility-transistors-correlating-device-behavior-with-nanoscale-interfaces-properties
#16
Giuseppe Greco, Patrick Fiorenza, Ferdinando Iucolano, Andrea Severino, Filippo Giannazzo, Fabrizio Roccaforte
In this work, the conduction mechanisms at the interface of AlN/SiN dielectric stacks with AlGaN/GaN heterostructures have been studied combining different macroscopic and nanoscale characterizations on bare materials and devices. The AlN/SiN stacks grown on the recessed region of AlGaN/GaN heterostructures have been used as gate dielectric of hybrid metal-insulator-semiconductor high electron mobility transistors (MISHEMTs), showing a normally-off behaviour (Vth=+1.2 V), high channel mobility (204 cm(2)V(-1)s(-1)), and very good switching behaviour (ION/IOFF current ratio of 5-6×10(8) and sub-threshold swing of 90 mV/dec)...
September 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28919703/quality-and-learning-curve-of-handheld-versus-stand-alone-non-mydriatic-cameras
#17
Mariya Gosheva, Christian Klameth, Lars Norrenberg, Lucien Clin, Johannes Dietter, Wadood Haq, Iliya V Ivanov, Focke Ziemssen, Martin A Leitritz
PURPOSE: Nowadays, complex digital imaging systems allow detailed retinal imaging without dilating patients' pupils. These so-called non-mydriatic cameras have advantages in common circumstances (eg, for screening or emergency purposes) but present limitations in terms of image quality and field of view. We compare the usefulness of two non-mydriatic camera systems (ie, a handheld versus a stand-alone device) for fundus imaging. The primary outcome was image quality. The secondary outcomes were learning effects and quality grade-influencing factors...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28917688/a-randomized-trial-of-pocket-echocardiography-integrated-mobile-health-device-assessments-in-modern-structural-heart-disease-clinics
#18
Sanjeev P Bhavnani, Srikanth Sola, David Adams, Ashwin Venkateshvaran, P K Dash, Partho P Sengupta
OBJECTIVES: This study sought to determine whether mobile health (mHealth) device assessments used as clinical decision support tools at the point-of-care can reduce the time to treatment and improve long-term outcomes among patients with rheumatic and structural heart diseases (SHD). BACKGROUND: Newly developed smartphone-connected mHealth devices represent promising methods to diagnose common diseases in resource-limited areas; however, the impact of technology-based care on long-term outcomes has not been rigorously evaluated...
September 9, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28916744/hydrogen-sulphate-based-ionic-liquid-assisted-electro-polymerization-of-pedot-catalyst-material-for-high-efficiency-photoelectrochemical-solar-cells
#19
Buket Bezgin Carbas, Mahir Gulen, Merve Celik Tolu, Savas Sonmezoglu
This work reports the facile, one-step electro-polymerization synthesis of poly (3,4-ethylenedioxythiophene) (PEDOT) using a 1-ethyl-3-methylimidazolium hydrogen sulphate (EMIMHSO4) ionic liquid (IL) and, for the first time its utilization as a counter electrode (CE) in dye-sensitized solar cells (DSSCs). Using the IL doped PEDOT as CE, we effectively improve the solar cell efficiency to as high as 8.52%, the highest efficiency reported in 150 mC/cm(2) charge capacity, an improvement of ~52% over the control device using the bare PEDOT CE (5...
September 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28915501/is-there-an-observational-effect-an-exploratory-study-into-speed-cameras-and-self-reported-offending-behaviour
#20
J Freeman, S-A Kaye, V Truelove, J Davey
Fixed and mobile speed cameras are an important element of enforcement initiatives designed to create a strong deterrent effect and improve road safety. Despite the widespread use of the technology and the need to create a strong deterrent effect, research has yet to determine if there is a relationship between levels of exposure to the devices and subsequent self-reported deterrent effects. As a result, licensed motorists (N=536; 51% female) in Queensland (Australia) were recruited to complete a questionnaire that measured exposure to speed cameras and associated offending behaviours...
September 12, 2017: Accident; Analysis and Prevention
keyword
keyword
101928
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"