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https://www.readbyqxmd.com/read/29145507/light-sensors-for-objective-light-measurement-in-ambulatory-polysomnography
#1
Rachel Schembri, Jo Spong, Allison Peters, Peter Rochford, Philip Wilksch, Fergal J O'Donoghue, Kenneth M Greenwood, Maree Barnes, Gerard A Kennedy, David J Berlowitz
Ambulatory polysomnography (PSG) does not commonly include an objective measure of light to determine the time of lights off (Loff), and thus cannot be used to calculate important indices such as sleep onset latency and sleep efficiency. This study examined the technical specifications and appropriateness of a prototype light sensor (LS) for use in ambulatory Compumedics Somte PSG.Two studies were conducted. The first examined the light measurement characteristics of the LS when used with a portable PSG device, specifically recording trace range, linearity, sensitivity, and stability...
2017: PloS One
https://www.readbyqxmd.com/read/29144722/transport-across-heterointerfaces-of-amorphous-niobium-oxide-and-crystallographically-oriented-epitaxial-germanium
#2
Mantu K Hudait, Michael Brian Clavel, Jheng-Sin Liu, Aheli Ghosh, Nikhil Jain, Robert J Bodnar
Due to the high carrier mobility of germanium (Ge) and high dielectric permittivity of amorphous niobium pentoxide (a-Nb2O5), Ge/a-Nb2O5 heterostructures offer several advantages for the rapidly developing field of oxide-semiconductor-based multifunctional devices. To this end, we investigation the growth, structural, band alignment, and metal-insulator-semiconductor (MIS) electrical properties of physical vapor deposited Nb2O5 on crystallographically oriented (100)Ge, (110), and (111)Ge epilayers. The as-deposited Nb2O5 dielectrics were found to be in the amorphous state, demonstrating an abrupt oxide/semiconductor heterointerface with respect to Ge, when examined via low- and high-magnification cross-sectional transmission electron microscopy...
November 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29142283/a-mobile-device-based-imaging-spectrometer-for-environmental-monitoring-by-attaching-a-lightweight-small-module-to-a-commercial-digital-camera
#3
Fuhong Cai, Wen Lu, Wuxiong Shi, Sailing He
Spatially-explicit data are essential for remote sensing of ecological phenomena. Lately, recent innovations in mobile device platforms have led to an upsurge in on-site rapid detection. For instance, CMOS chips in smart phones and digital cameras serve as excellent sensors for scientific research. In this paper, a mobile device-based imaging spectrometer module (weighing about 99 g) is developed and equipped on a Single Lens Reflex camera. Utilizing this lightweight module, as well as commonly used photographic equipment, we demonstrate its utility through a series of on-site multispectral imaging, including ocean (or lake) water-color sensing and plant reflectance measurement...
November 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29137899/joint-gap-in-mid-flexion-is-not-a-predictor-of-postoperative-flexion-angle-after-total-knee-arthroplasty
#4
Yukihide Minoda, Shigeru Nakagawa, Ryo Sugama, Tessyu Ikawa, Takahiro Noguchi, Masashi Hirakawa
BACKGROUND: Postoperative knee flexion angle is one of the most important outcomes of total knee arthroplasty (TKA). Intraoperative ligament balancing may affect the postoperative range of motion of the knee. However, the relationship between intraoperative ligament balancing and postoperative flexion angle was still controversial. The purpose of this study was to determine whether intraoperative joint gap affects postoperative knee flexion angle or not. METHODS: Prospective multicenter study of 246 knees with varus osteoarthritis undergoing a posterior-stabilized, mobile-bearing TKA was performed...
November 11, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29136031/quantification-of-the-sit-to-stand-movement-for-monitoring-age-related-motor-deterioration-using-the-nintendo-wii-balance-board
#5
Go Yamako, Etsuo Chosa, Koji Totoribe, Yuu Fukao, Gang Deng
Simple methods for quantitative evaluations of individual motor performance are crucial for the early detection of motor deterioration. Sit-to-stand movement from a chair is a mechanically demanding component of activities of daily living. Here, we developed a novel method using the ground reaction force and center of pressure measured from the Nintendo Wii Balance Board to quantify sit-to-stand movement (sit-to-stand score) and investigated the age-related change in the sit-to-stand score as a method to evaluate reduction in motor performance...
2017: PloS One
https://www.readbyqxmd.com/read/29135259/thiadiazoloquinoxaline-fused-naphthalenediimides-for-n-type-organic-field-effect-transistors-ofets
#6
Ben-Lin Hu, Ke Zhang, Cunbin An, Wojciech Pisula, Martin Baumgarten
Thiadiazoloquinoxaline-fused naphthalenediimides (TQ-f-NDIs) are designed and synthesized. They show high electron affinities (EAs) of ∼4.5 eV. Organic field-effect transistor (OFET) devices, fabricated by dip-coating, provided maximum high electron mobilities of 0.03 cm(2)/(V·s) with an on/off ratio of 2 × 10(5).
November 14, 2017: Organic Letters
https://www.readbyqxmd.com/read/29134208/tunable-plasmon-resonance-of-molybdenum-oxide-nanoparticles-synthesized-in-non-aqueous-media
#7
Seung Hyuk Lee, Hiroyasu Nishi, Tetsu Tatsuma
Plasmonic compound nanoparticles (NPs) have attracted great interest because they are prepared at lower cost and show unique optical properties. However, full replacement of the plasmonic noble metal NPs with the compound NPs has been difficult because most of the compound NPs exhibit plasmon resonance in the infrared range owing to low free carrier density and mobility. In order to overcome this limitation, we developed a new synthetic method for plasmonic MoO2 and MoO3-x NPs. Those NPs exhibit plasmon resonance at ∼500 nm and 600-1000 nm, respectively, likely because of high carrier densities...
November 14, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29133859/conformal-transistor-arrays-based-on-solution-processed-organic-crystals
#8
Xiaoli Zhao, Bing Zhang, Qingxin Tang, Xueyan Ding, Shuya Wang, Yuying Zhou, Yanhong Tong, Yichun Liu
Conformal transistor array based on solution-processed organic crystals, which can provide sensory and scanning features for monitoring, biofeedback, and tracking of physiological function, presents one of the most promising technologies for future large-scale low-cost wearable and implantable electronics. However, it is still a huge challenge for the integration of solution-processed organic crystals into conformal FETs owing to a generally existing swelling phenomenon of the elastic materials and the lack of the corresponding device fabrication technology...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29132618/telehealth-attitudes-and-use-among-medical-professionals-medical-students-and-patients-in-china-a-cross-sectional-survey
#9
Peiran Chen, Lihong Xiao, Zhongping Gou, Liangcheng Xiang, Xinxing Zhang, Ping Feng
BACKGROUND: Telehealth aims to revolutionize health care by migrating health care from hospitals and satellite clinics directly into the home and onto mobile devices. Telehealth has the potential to increase public access to healthcare in China, where large segments of the population remain underserved, yet little is known about current attitudes and use of telehealth in the country. OBJECTIVE: Our aim was to determine attitudes and use of telehealth in China among medical professionals and patients, as well as identify factors that may affect its use...
December 2017: International Journal of Medical Informatics
https://www.readbyqxmd.com/read/29131429/highly-efficient-porphyrin-based-opv-perovskite-hybrid-solar-cells-with-extended-photoresponse-and-high-fill-factor
#10
Ke Gao, Zonglong Zhu, Bo Xu, Sae Byeok Jo, Yuanyuan Kan, Xiaobin Peng, Alex K-Y Jen
Employing a layer of bulk-heterojunction (BHJ) organic semiconductors on top of perovskite to further extend its photoresponse is considered as a simple and promising way to enhance the efficiency of perovskite-based solar cells, instead of using tandem devices or near infrared (NIR)-absorbing Sn-containing perovskites. However, the progress made from this approach is quite limited because very few such hybrid solar cells can simultaneously show high short-circuit current (JSC ) and fill factor (FF). To find an appropriate NIR-absorbing BHJ is essential for highly efficient, organic, photovoltaics (OPV)/perovskite hybrid solar cells...
November 13, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29131174/tunable-graphene-plasmonic-y-branch-switch-in-the-terahertz-region-using-hexagonal-boron-nitride-with-electric-and-magnetic-biasing
#11
Ali Farmani, Mahdi Yavarian, Abbas Alighanbari, Mehdi Miri, Mohammad H Sheikhi
A tunable graphene plasmonic Y-branch switch at THz wavelengths is proposed. The effects of magnetic and electric biasing are studied to harness the transmission of the transverse electric and magnetic guided mode resonances. In the structure, hexagonal boron nitride is utilized as a substrate for graphene. The application of hexagonal boron nitride, with the advantages of high mobility and ultralow ohmic loss, introduces a promising alternative substrate for graphene. Analytical and numerical results show that, by slight variation of the doping level in graphene through magnetic and electric biasing, the characteristics of the propagation of the guided mode resonances can be manipulated...
November 10, 2017: Applied Optics
https://www.readbyqxmd.com/read/29130752/self-reported-difficulty-and-preferences-of-wheeled-mobility-device-users-for-simulated-low-floor-bus-boarding-interior-circulation-and-disembarking
#12
Clive D'Souza, Victor L Paquet, James A Lenker, Edward Steinfeld
BACKGROUND: Low ridership of public transit buses among wheeled mobility device users suggests the need to identify vehicle design conditions that are either particularly accommodating or challenging. The objective of this study was to determine the effects of low-floor bus interior seating configuration and passenger load on wheeled mobility device user-reported difficulty, overall acceptability and design preference. METHODS: Forty-eight wheeled mobility users evaluated three interior design layouts at two levels of passenger load (high vs...
November 13, 2017: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/29129058/silicon-nanomembranes-with-hybrid-crystal-orientations-and-strain-states
#13
Shelley Scott, Christoph Deneke, Deborah M Paskiewicz, Hyuk Ju Ryu, Angelo Malachias, Stefan Baunack, Oliver G Schmidt, Donald E Savage, Mark A Eriksson, Max G Lagally
Methods to integrate different crystal orientations, strain states, and compositions of semiconductors in a planar, and preferably flexible, configuration may enable non-traditional sensing, stimulating, or communication device applications. We combine crystalline-silicon nanomembranes, patterning, membrane transfer, and epitaxial growth to demonstrate planar arrays of different orientations and strain states of Si in a single membrane, which is then readily transferable to other substrates, including flexible supports...
November 11, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29126580/codebook-based-electrooculography-data-analysis-towards-cognitive-activity-recognition
#14
P Lagodzinski, K Shirahama, M Grzegorzek
With the advancement in mobile/wearable technology, people started to use a variety of sensing devices to track their daily activities as well as health and fitness conditions in order to improve the quality of life. This work addresses an idea of eye movement analysis, which due to the strong correlation with cognitive tasks can be successfully utilized in activity recognition. Eye movements are recorded using an electrooculographic (EOG) system built into the frames of glasses, which can be worn more unobtrusively and comfortably than other devices...
October 28, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29126128/identification-of-the-optimal-protocol-for-automated-office-blood-pressure-measurement-among-patients-with-treated-hypertension
#15
Myles N Moore, Martin G Schultz, Mark R Nelson, J Andrew Black, Nathan B Dwyer, Ella Hoban, Matthew D Jose, Wojciech Kosmala, Monika Przewlocka-Kosmala, Jowita Zachwyc, Petr Otahal, Dean S Picone, Philip Roberts-Thomson, Panagiota Veloudi, James E Sharman
BACKGROUND: Automated office blood pressure (AOBP) involving repeated, unobserved blood pressure (BP) readings during one clinic visit is recommended for in-office diagnosis and assessment of hypertension. However, the optimal AOBP protocol to determine BP control in the least amount of time with the fewest BP readings is yet to be determined and was the aim of this study. METHODS: One hundred and eighty-nine patients (mean age 62.8 ± 12.1 years; 50.3% female) with treated hypertension referred to specialist clinics at 2 sites underwent AOBP in a quiet room alone...
November 6, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/29123216/a-facile-hydrothermal-approach-for-the-density-tunable-growth-of-zno-nanowires-and-their-electrical-characterizations
#16
S Boubenia, A S Dahiya, G Poulin-Vittrant, F Morini, K Nadaud, D Alquier
Controlling properties of one-dimensional (1D) semiconducting nanostructures is essential for the advancement of electronic devices. In this work, we present a low-temperature hydrothermal growth process enabling density control of aligned high aspect ratio ZnO nanowires (NWs) on seedless Au surface. A two order of magnitude change in ZnO NW density is demonstrated via careful control of the ammonium hydroxide concentration (NH4OH) in the solution. Based on the experimental observations, we further, hypothesized the growth mechanism leading to the density controlled growth of ZnO NWs...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29123115/gas-sensors-boosted-by-two-dimensional-h-bn-enabled-transfer-on-thin-substrate-foils-towards-wearable-and-portable-applications
#17
Taha Ayari, Chris Bishop, Matthew B Jordan, Suresh Sundaram, Xin Li, Saiful Alam, Youssef ElGmili, Gilles Patriarche, Paul L Voss, Jean Paul Salvestrini, Abdallah Ougazzaden
The transfer of GaN based gas sensors to foreign substrates provides a pathway to enhance sensor performance, lower the cost and extend the applications to wearable, mobile or disposable systems. The main keys to unlocking this pathway is to grow and fabricate the sensors on large h-BN surface and to transfer them to the flexible substrate without any degradation of the performances. In this work, we develop a new generation of AlGaN/GaN gas sensors with boosted performances on a low cost flexible substrate...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29120882/donation-after-circulatory-death-and-its-expansion-in-spain
#18
Eduardo Miñambres, Juan J Rubio, Elisabeth Coll, Beatriz Domínguez-Gil
PURPOSE OF REVIEW: Donation after circulatory death (DCD) is still performed in a limited number of countries. This article summarizes the development of DCD in Spain and presents recent Spanish contributions to gain knowledge on the potential benefits and the practical use of normothermic regional perfusion (nRP). RECENT FINDINGS: DCD now contributes to 24% of deceased donors in Spain. The development of DCD has been based on an assessment of practices in the treatment of cardiac arrest and end-of-life care to accommodate the option of DCD; the creation of an adequate regulatory framework; and institutional support, professional training and public education...
November 7, 2017: Current Opinion in Organ Transplantation
https://www.readbyqxmd.com/read/29120006/manufactured-brace-modalities-for-elbow-stiffness
#19
Nipun Sodhi, Anton Khlopas, Michael D Vaughn, Jaiben George, George Yakubek, Assem A Sultan, Steven F Harwin, Michael A Mont
Multiple surgical and nonsurgical treatment options exist for patients with elbow stiffness. Many nonsurgical mobilization bracing options have been implemented to increase elbow range of motion. Three of the main bracing options for these patients are turnbuckle, static progressive stretch, and dynamic bracing. The purpose of this study was to review the current literature on turnbuckle, static progressive stretch, and dynamic bracing to provide information for practitioners and patients regarding which brace is more appropriate to use for elbow stiffness...
November 8, 2017: Orthopedics
https://www.readbyqxmd.com/read/29118792/anchoring-pipeline-flow-diverter-construct-in-the-treatment-of-traumatic-distal-cervical-carotid-artery-injury
#20
Krishna Amuluru, Fawaz Al-Mufti, William Roth, Charles J Prestigiacomo, Chirag D Gandhi
Background: Traumatic extracranial internal carotid artery (ICA) dissections are uncommon and can be difficult to treat. Thinning of adventitia and dilatation may occur following arterial dissection, thus resulting in a fusiform pseudoaneurysm, which can subsequently cause bleeding, expanding, or pulsatile hematoma. Currently, medical management with anticoagulation remains the first line of treatment and yields good outcomes in 75% of cases with a mortality rate of 3-4%. Endovascular intervention is indicated with failure of medical therapy, progressive enlargement of a traumatic pseudoaneurysm, acute flow-related infarcts due to vessel occlusion, or when anticoagulation is contraindicated due to risk of pseudoaneurysm rupture and hemorrhage...
October 2017: Interventional Neurology
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