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https://www.readbyqxmd.com/read/27911417/plasma-assisted-molecular-beam-epitaxy-of-n-polar-inaln-barrier-high-electron-mobility-transistors
#1
Matthew T Hardy, David F Storm, D Scott Katzer, Brian P Downey, Neeraj Nepal, David J Meyer
Plasma-assisted molecular beam epitaxy is well suited for the epitaxial growth of III-nitride thin films and heterostructures with smooth, abrupt interfaces required for high-quality high-electron-mobility transistors (HEMTs). A procedure is presented for the growth of N-polar InAlN HEMTs, including wafer preparation and growth of buffer layers, the InAlN barrier layer, AlN and GaN interlayers and the GaN channel. Critical issues at each step of the process are identified, such as avoiding Ga accumulation in the GaN buffer, the role of temperature on InAlN compositional homogeneity, and the use of Ga flux during the AlN interlayer and the interrupt prior to GaN channel growth...
November 24, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27907113/scalable-video-streaming-relay-for-smart-mobile-devices-in-wireless-networks
#2
Dongwoo Kwon, Huigwang Je, Hyeonwoo Kim, Hongtaek Ju, Donghyeok An
Recently, smart mobile devices and wireless communication technologies such as WiFi, third generation (3G), and long-term evolution (LTE) have been rapidly deployed. Many smart mobile device users can access the Internet wirelessly, which has increased mobile traffic. In 2014, more than half of the mobile traffic around the world was devoted to satisfying the increased demand for the video streaming. In this paper, we propose a scalable video streaming relay scheme. Because many collisions degrade the scalability of video streaming, we first separate networks to prevent excessive contention between devices...
2016: PloS One
https://www.readbyqxmd.com/read/27906071/are-digital-interventions-for-smoking-cessation-in-pregnancy-effective-a-systematic-review-protocol
#3
Sarah Ellen Griffiths, Katherine E Brown, Emily Anne Fulton, Ildiko Tombor, Felix Naughton
BACKGROUND: Behavioural support for smoking cessation in pregnancy can be effective; however, many pregnant women face barriers to seeking support to stop smoking. Some digital interventions have been found to be effective for smoking cessation in the general population and may be effective for supporting cessation in pregnancy due to their flexibility and the potential for personalisation. To date, there is limited evidence of the effectiveness of digital interventions for smoking cessation in pregnancy...
December 1, 2016: Systematic Reviews
https://www.readbyqxmd.com/read/27905602/achieving-enhanced-ionic-mobility-in-nanoporous-silica-by-controlled-surface-interactions
#4
Mounesha Nagendrachar Garaga, Luis Aguilera, Negin Yaghini, Aleksandar Matic, Michael Persson, Anna Martinelli
We report a strategy to enhance the ionic mobility in an emerging class of gels, based on robust nanoporous silica micro-particles, by chemical functionalization of the silica surface. Two very different ionic liquids are used to fill the nano-pores of silica at varying pore filling factors, namely one aprotic imidazolium based (1-methyl-3-hexylimidazolium bis(trifluoromethanesulfonyl)imide, C6C1ImTFSI), and one protic ammonium based (diethylmethylammonium methanesulfonate, DEMAOMs) ionic liquid. Both these ionic liquids display higher ionic mobility when confined in functionalized silica as compared to untreated silica nano-pores, an improvement that is more pronounced at low pore filling factors (i...
December 1, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27904963/10-year-follow-up-after-implantation-of-the-bryan-cervical-disc-prosthesis
#5
Joost Dejaegher, Joris Walraevens, Johannes van Loon, Frank Van Calenbergh, Philippe Demaerel, Jan Goffin
PURPOSE: Cervical arthroplasty is being used as an alternative for cervical fusion, but long-term follow-up results have rarely been reported. In this paper, we present 10-year follow-up results after implantation of the Bryan Cervical Disc Prosthesis in a single center. METHODS: 89 patients underwent implantation of a single-level Bryan Cervical Disc Prosthesis to treat radiculopathy and/or myelopathy. Clinical (Neurological Success, Neck Disability Index (NDI), Neck- and Arm-Pain, and SF-36) and radiological follow-up was prospectively organized up to 10 years after surgery...
November 30, 2016: European Spine Journal
https://www.readbyqxmd.com/read/27904221/what-have-we-learned-from-100-success-of-press-fit-condylar-rotating-platform-posterior-stabilized-knees-a-5-10-years-followup-by-a-nondesigner
#6
Shrinand V Vaidya, Siddharth Virani, Rajendra Phunde, Abhishek Mahajan
BACKGROUND: Total joint arthroplasties of the hip and knee represent a remarkable feat of modern medicine in terms of reducing pain and restoring function to millions of patients afflicted with severe arthritis. Oftentimes, the performance and longevity of new implants and devices are based on limited data. This is the first study by a non-designer on the press fit condylar rotating platform posterior stabilized (PFC-RP-PS) design with 100' success. This has a relevance, vis-á -vis bias that one may have in terms of reproducibility of technique and funding from the manufacturer...
November 2016: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/27903766/sudden-unexpected-death-in-epilepsy-measures-to-reduce-risk
#7
REVIEW
Brendan Mclean, Rohit Shankar, Jane Hanna, Caryn Jory, Craig Newman
This review looks at the strategies that may help to reduce the risk of sudden unexpected death in epilepsy beyond that of trying to achieve seizure cessation, which is not possible for up to 30% of patients with epilepsy. These strategies include seizure safety checklists, mobile phone technology, telehealth and various devices currently available or in development. We highlight interventions where there is evidence of benefit, and draw attention for the need both to involve patients with epilepsy in risk reduction and to improve communication with those at risk...
November 30, 2016: Practical Neurology
https://www.readbyqxmd.com/read/27900498/central-hemodynamics-and-arterial-stiffness-in-idiopathic-and-multiple-system-atrophy
#8
Klaas Franzen, Sabine Fliegen, Jelena Koester, Rafael Campos Martin, Günther Deuschl, Michael Reppel, Kai Mortensen, Susanne A Schneider
Blood pressure is commonly abnormal in parkinsonian disorders, but central hemodynamics and arterial stiffness, well-established predictors of total cardiovascular risk, have rarely been studied in these disorders. 32 patients [27 with idiopathic Parkinson's disease (iPD); 5 with multiple system atrophy (MSA)] and 15 controls matched for cardiac risk factors underwent 24 h-ambulatory blood pressure recordings using an I.E.M. device (Mobil-O-Graph™), measuring peripheral pressure and calculating central pressures and arterial stiffness...
November 29, 2016: Journal of Neurology
https://www.readbyqxmd.com/read/27899727/using-smartphones-to-collect-behavioral-data-in-psychological-science-opportunities-practical-considerations-and-challenges
#9
Gabriella M Harari, Nicholas D Lane, Rui Wang, Benjamin S Crosier, Andrew T Campbell, Samuel D Gosling
Smartphones now offer the promise of collecting behavioral data unobtrusively, in situ, as it unfolds in the course of daily life. Data can be collected from the onboard sensors and other phone logs embedded in today's off-the-shelf smartphone devices. These data permit fine-grained, continuous collection of people's social interactions (e.g., speaking rates in conversation, size of social groups, calls, and text messages), daily activities (e.g., physical activity and sleep), and mobility patterns (e.g., frequency and duration of time spent at various locations)...
November 2016: Perspectives on Psychological Science: a Journal of the Association for Psychological Science
https://www.readbyqxmd.com/read/27899268/the-effects-of-the-smart-environment-on-the-information-divide-experienced-by-people-with-disabilities
#10
Su-Jung Nam, Eun-Young Park
BACKGROUND: Information and Communication Technology (ICT) is connected with every aspect of social, cultural, economic, educational, and commercial activity. Smart devices in particular have changed society and are necessary goods for modern people. Smart device usage is rapidly growing in everyday life, so the ability to use a smart device is increasingly important, yet there is little data supporting increased digital inclusion of people with disabilities in mobile device use. OBJECTIVE/HYPOTHESIS: This study investigates the effects of the smart environment on the information divide experienced by people with disabilities...
November 16, 2016: Disability and Health Journal
https://www.readbyqxmd.com/read/27898157/everyday-sitting-behavior-of-full-time-wheelchair-users
#11
Sharon E Sonenblum, Stephen H Sprigle, James S Martin
The objective of this study was to describe the in-seat movement and weight-shifting behavior of full-time wheelchair users. We measured everyday sitting behavior for 192 d across 28 individuals who used manual wheelchairs as their primary mobility device. To obtain the measurements, we used eight thin force sensors placed under participants' wheelchair cushions. On a typical day, participants spent an average of 10.6 +/- 3.0 h in their wheelchair and transferred out of the wheelchair 8.4 +/- 4.3 times. Participants only performed pressure reliefs (90% off-loading of the entire buttocks for at least 15 s) 0...
2016: Journal of Rehabilitation Research and Development
https://www.readbyqxmd.com/read/27898156/scoping-review-of-mobility-scooter-related-research-studies
#12
W Ben Mortenson, Jenny Kim
Mobility scooters are three- or four-wheeled power mobility devices regularly used by people who have difficulty ambulating. They also differ from power wheelchairs in terms of their driving controls, programmability, seating, and mounting method. Given their growing popularity and anecdotal concerns around their use, a scoping review was undertaken to identify empirical research about mobility scooters and to analyze their study design and purpose. Data sources included MedLINE, Cumulative Index to Nursing and Allied Health Literature, Embase, and PsychINFO...
2016: Journal of Rehabilitation Research and Development
https://www.readbyqxmd.com/read/27896984/methods-for-clustering-time-series-data-acquired-from-mobile-health-apps
#13
Nicole Tignor, Pei Wang, Nicholas Genes, Linda Rogers, Steven G Hershman, Erick R Scott, Micol Zweig, Yu-Feng Yvonne Chan, Eric E Schadt
In our recent Asthma Mobile Health Study (AMHS), thousands of asthma patients across the country contributed medical data through the iPhone Asthma Health App on a daily basis for an extended period of time. The collected data included daily self-reported asthma symptoms, symptom triggers, and real time geographic location information. The AMHS is just one of many studies occurring in the context of now many thousands of mobile health apps aimed at improving wellness and better managing chronic disease conditions, leveraging the passive and active collection of data from mobile, handheld smart devices...
2016: Pacific Symposium on Biocomputing
https://www.readbyqxmd.com/read/27896779/multiplex-smartphone-diagnostics
#14
Juan L Martinez-Hurtado, Ali K Yetisen, Seok-Hyun Yun
Increasing computing power in smartphones allows for their transformation into point-of-care diagnostic devices. Mobile medical diagnostic applications enable utilization of the processing capabilities of smartphones through their cameras. Hardware attachments or stand-alone versions of smartphone diagnostics have the capability to revolutionize quantitative readouts. Here, we describe a protocol for quantifying commercial colorimetric diagnostic tests with a stand-alone smartphone application. This approach can be used in the multiplexed analyses of biomarker readouts...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27896610/limited-awareness-of-the-essences-of-certification-or-compliance-markings-on-medical-devices
#15
REVIEW
Jong Yong Abdiel Foo, Xin Ji Alan Tan
Medical devices have been long used for odiagnostic, therapeutic or rehabilitation purposes. Currently, they can range from a low-cost portable device that is often used for personal health monitoring to high-end sophisticated equipment that can only be operated by trained professionals. Depending on the functional purposes, there are different certification or compliance markings on the device when it is sold. One common certification marking is the Conformité Européenne affixation but this has a range of certification mark numbering for a variety of functional purposes...
November 28, 2016: Science and Engineering Ethics
https://www.readbyqxmd.com/read/27894679/use-of-the-lymphocyte-cytokinesis-block-micronucleus-assay-in-occupational-biomonitoring-of-genome-damage-caused-by-in-vivo-exposure-to-chemical-genotoxins-past-present-and-future
#16
REVIEW
Armen Nersesyan, Michael Fenech, Claudia Bolognesi, Miroslav Mišík, Tahereh Setayesh, Georg Wultsch, Stefano Bonassi, Philip Thomas, Siegfried Knasmüller
This article concerns the use of the lymphocyte cytokinesis-block micronucleus (CBMN) assay in biomonitoring of occupational and environmental exposures to genotoxic agents. Furthermore, we evaluated the use of this method in different exposure scenarios, in comparison to other DNA damage biomarkers and its regional distribution. So far ca. 400 studies have been published and the number increased substantially in the last years. The most frequently investigated groups are hospital personnel, followed by workers in the chemical industry and agricultural workers...
October 2016: Mutation Research
https://www.readbyqxmd.com/read/27893380/area-determination-of-diabetic-foot-ulcer-images-using-a-cascaded-two-stage-svm-based-classification
#17
Lei Wang, Peder Pedersen, Emmanuel Agu, Diane Strong, Bengisu Tulu
It is standard practice for clinicians and nurses to primarily assess patients' wounds via visual examination. This subjective method can be inaccurate in wound assessment and also represents a significant clinical workload. Hence, computer-based systems, especially implemented on mobile devices, can provide automatic, quantitative wound assessment and can thus be valuable for accurately monitoring wound healing status. Out of all wound assessment parameters, the measurement of the wound area is the most suitable for automated analysis...
November 23, 2016: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/27891356/attitudes-and-perceptions-of-medical-undergraduates-towards-mobile-learning-m-learning
#18
Rakesh Narayan Patil, Balaji D Almale, Mrunal Patil, Amit Gujrathi, Supriya Dhakne-Palwe, Anuradha R Patil, Shriram Gosavi
INTRODUCTION: Mobile technology is one of the latest extensions of technological innovations that can be integrated into medical education. With the aid of these devices, students learn faster outside the classroom by having quick access to the internet and easy retrieval of required health related learning resources to keep alongside of recent trend and development. In medicine practice one has to continuously update his/her medical knowledge and mobile learning will serve as a tool for self-directed learning...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27890833/pulse-wave-analysis-after-treatment-of-abdominal-aortic-aneurysms-with-the-ovation-device
#19
Efstratios Georgakarakos, Christos Argyriou, George S Georgiadis, Miltos K Lazarides
BACKGROUND: Ovation Aortic Stent-Graft System is a new device for the endovascular treatment of Abdominal Aortic Aneurysms achieving fixation via a 35-mm long, rigid ancored suprarenal stent and sealing stent at the infrarenal level by a means of a polymer-filling pair of inflatable O-rings which cause narrowing of flow lumen and regional stenosis. Thus, concerns have been raised regarding hemodynamic consequences associated with this new desing . Our preliminary report showed no significant increase of aortic pulse wave velocity (aPWV) immediately after implantation of the Ovation in 3 patients...
November 24, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27890131/the-role-of-size-of-input-box-location-of-input-box-input-method-and-display-size-in-chinese-handwriting-performance-and-preference-on-mobile-devices
#20
Zhe Chen, Pei-Luen Patrick Rau
This study presented two experiments on Chinese handwriting performance (time, accuracy, the number of protruding strokes and number of rewritings) and subjective ratings (mental workload, satisfaction, and preference) on mobile devices. Experiment 1 evaluated the effects of size of the input box, input method and display size on Chinese handwriting performance and preference. It was indicated that the optimal input sizes were 30.8 × 30.8 mm, 46.6 × 46.6 mm, 58.9 × 58.9 mm and 84.6 × 84.6 mm for devices with 3...
March 2017: Applied Ergonomics
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