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Hall power

Michael E Hall, Jennifer H Jordan, Luis A Juncos, W Gregory Hundley, John E Hall
Magnetic resonance (MR) imaging, a non-invasive modality that provides anatomic and physiologic information, is increasingly used for diagnosis of pathophysiologic conditions and for understanding renal physiology in humans. Although functional MR imaging methods were pioneered to investigate the brain, they also offer powerful techniques for investigation of other organ systems such as the kidneys. However, imaging the kidneys provides unique challenges due to potential complications from contrast agents. Therefore, development of non-contrast techniques to study kidney anatomy and physiology is important...
2018: International Journal of Nephrology and Renovascular Disease
Arjun Mani, Colin Benjamin
The thermoelectric properties of a three-terminal quantum spin Hall (QSH) sample are examined. The inherent helicity of the QSH sample helps to generate a large charge power efficiently. Along with charge the system can be designed to work as a highly efficient spin heat engine too. The advantage of a helical over a chiral sample is that, while a multiterminal quantum Hall sample can only work as a quantum heat engine due to broken time reversal (TR) symmetry, a multiterminal QSH system can work effectively as both a charge or spin heat engine and as a charge or spin refrigerator as the TR symmetry is preserved...
February 2018: Physical Review. E
H Wu, L Huang, C Fang, B S Yang, C H Wan, G Q Yu, J F Feng, H X Wei, X F Han
The key physics of the spin valve involves spin-polarized conduction electrons propagating between two magnetic layers such that the device conductance is controlled by the relative magnetization orientation of two magnetic layers. Here, we report the effect of a magnon valve which is made of two ferromagnetic insulators (YIG) separated by a nonmagnetic spacer layer (Au). When a thermal gradient is applied perpendicular to the layers, the inverse spin Hall voltage output detected by a Pt bar placed on top of the magnon valve depends on the relative orientation of the magnetization of two YIG layers, indicating the magnon current induced by the spin Seebeck effect at one layer affects the magnon current in the other layer separated by Au...
March 2, 2018: Physical Review Letters
Selma Sassi, Christophe Candolfi, Christine Gendarme, Anne Dauscher, Bertrand Lenoir
The crystal structure and transport properties (2-723 K) of the homologous compound Pb5 Bi6 Se14 with partial substitution of Te for Se are studied by means of powder X-ray diffraction, scanning electron microscopy, electrical resistivity, thermopower, thermal conductivity and Hall effect measurements. Polycrystalline samples of Pb5 Bi6 Se14-x Tex (0 ≤ x ≤ 1.0) were prepared by a two-step synthesis method based on the pseudo-binary PbSe-Bi2 Se3 phase diagram combined with Te substitution in the PbSe precursor...
March 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
Dae-Myeong Geum, SangHyeon Kim, SooSeok Kang, Hosung Kim, Hwanyeol Park, Il Pyo Rho, Seung Yeop Ahn, Jindong Song, Won Jun Choi, Euijoon Yoon
In this paper, InAs0.81 Sb0.19 -based hetero-junction photovoltaic detector (HJPD) with an In0.2 Al0.8 Sb barrier layer was grown on GaAs substrates. By using technology computer aided design (TCAD), a design of a barrier layer that can achieve nearly zero valance band offsets was accomplished. A high quality InAs0.81 Sb0.19 epitaxial layer was obtained with relatively low threading dislocation density (TDD), calculated from a high-resolution X-ray diffraction (XRD) measurement. This layer showed a Hall mobility of 15,000 cm2 /V⋅s, which is the highest mobility among InAsSb layers with an Sb composition of around 20% grown on GaAs substrates...
March 5, 2018: Optics Express
Szymon Wójtewicz, Agata Cygan, Jolanta Domysławska, Katarzyna Bielska, Piotr Morzyński, Piotr Masłowski, Roman Ciuryło, Daniel Lisak
The response of an optical cavity to incomplete extinction of nearly resonant incident light was experimentally examined. Measurements were performed using a Pound-Drever-Hall-locked frequency-stabilized cavity ring-down spectrometer (CRDS) that allowed the laser frequency detuning from the cavity resonance center to be controlled at Hz-level resolution. It is shown that an insufficient laser light extinction ratio combined with a phase shift and frequency detuning may lead to non-exponential cavity pumping and decay signals...
March 5, 2018: Optics Express
Alix E Hall, Jamie Bryant, Rob W Sanson-Fisher, Elizabeth A Fradgley, Anthony M Proietto, Ian Roos
BACKGROUND: To ensure the provision of patient-centred health care, it is essential that consumers are actively involved in the process of determining and implementing health-care quality improvements. However, common strategies used to involve consumers in quality improvements, such as consumer membership on committees and collection of patient feedback via surveys, are ineffective and have a number of limitations, including: limited representativeness; tokenism; a lack of reliable and valid patient feedback data; infrequent assessment of patient feedback; delays in acquiring feedback; and how collected feedback is used to drive health-care improvements...
March 7, 2018: Health Expectations: An International Journal of Public Participation in Health Care and Health Policy
Birgit Frauscher, Nicolas von Ellenrieder, Rina Zelmann, Irena Doležalová, Lorella Minotti, André Olivier, Jeffery Hall, Dominique Hoffmann, Dang Khoa Nguyen, Philippe Kahane, François Dubeau, Jean Gotman
In contrast to scalp EEG, our knowledge of the normal physiological intracranial EEG activity is scarce. This multicentre study provides an atlas of normal intracranial EEG of the human brain during wakefulness. Here we present the results of power spectra analysis during wakefulness. Intracranial electrodes are placed in or on the brain of epilepsy patients when candidates for surgical treatment and non-invasive approaches failed to sufficiently localize the epileptic focus. Electrode contacts are usually in cortical regions showing epileptic activity, but some are placed in normal regions, at distance from the epileptogenic zone or lesion...
March 1, 2018: Brain: a Journal of Neurology
AnnMarie Hipsley, Brad Hall, Karolinne M Rocha
Presbyopia corrections traditionally have been approached with attempts to exchange power, either at the cornea or the lens planes, inducing multifocality, or altering asphericity to impact the optical system. Treatments that affect the visual axis, such as spectacle and contact lens correction, refractive surgeries, corneal onlays and inlays, and intraocular lenses are typically unable to restore true accommodation to the presbyopic eye. Their aim is instead to enhance 'pseudoaccommodation' by facilitating an extended depth-of-focus for which vision is sufficient...
2018: Eye and Vision (London, England)
Angela R Bradbury, Linda J Patrick-Miller, Brian L Egleston, Michael J Hall, Susan M Domchek, Mary B Daly, Pamela Ganschow, Generosa Grana, Olufunmilayo I Olopade, Dominique Fetzer, Amanda Brandt, Rachelle Chambers, Dana F Clark, Andrea Forman, Rikki Gaber, Cassandra Gulden, Janice Horte, Jessica M Long, Terra Lucas, Shreshtha Madaan, Kristin Mattie, Danielle McKenna, Susan Montgomery, Sarah Nielsen, Jacquelyn Powers, Kim Rainey, Christina Rybak, Michelle Savage, Christina Seelaus, Jessica Stoll, Jill E Stopfer, Xinxin Shirley Yao
Background: Germline genetic testing is standard practice in oncology. Outcomes of telephone disclosure of a wide range of cancer genetic test results, including multigene panel testing (MGPT) are unknown. Methods: Patients undergoing cancer genetic testing were recruited to a multicenter, randomized, noninferiority trial (NCT01736345) comparing telephone disclosure (TD) of genetic test results with usual care, in-person disclosure (IPD) after tiered-binned in-person pretest counseling...
February 27, 2018: Journal of the National Cancer Institute
Omar Felipe Dueñas-Garcia, Tania Sierra, Danielle Taylor, Katherine Leung, Cynthia D Hall, Michael K Flynn
OBJECTIVE: To determine the effect of preoperative oral phenazopyridine on postoperative voiding dysfunction in women undergoing a retropubic midurethral sling. METHODS: A single-institution randomized clinical trial was performed from September 2015 to March 2017, comparing 200 mg of oral phenazopyridine versus no phenazopyridine in patients undergoing a retropubic midurethral sling under general anesthesia with no concomitant procedures. A power calculation indicated that we required at least 40 subjects per arm...
March 2018: Female Pelvic Medicine & Reconstructive Surgery
Charlotte L Hall, Marilyn James, Sue Brown, Jennifer L Martin, Nikki Brown, Kim Selby, Julie Clarke, Hena Vijayan, Boliang Guo, Kapil Sayal, Chris Hollis, Madeleine J Groom
INTRODUCTION: Attention-deficit hyperactivity disorder (ADHD) is characterised by symptoms of inattention, hyperactivity and impulsivity. To improve outcomes, the National Institute for Health and Care Excellence ADHD guidelines recommend regular monitoring of symptoms when children commence medication. However, research suggests that routine monitoring rarely happens, and clinicians often rely on subjective information such as reports from parents and teachers to ascertain improvement...
February 15, 2018: BMJ Open
José M Caridad, Stephen R Power, Mikkel R Lotz, Artsem A Shylau, Joachim D Thomsen, Lene Gammelgaard, Timothy J Booth, Antti-Pekka Jauho, Peter Bøggild
Conductance quantization is the quintessential feature of electronic transport in non-interacting mesoscopic systems. This phenomenon is observed in quasi one-dimensional conductors at zero magnetic field B, and the formation of edge states at finite magnetic fields results in wider conductance plateaus within the quantum Hall regime. Electrostatic interactions can change this picture qualitatively. At finite B, screening mechanisms in narrow, gated ballistic conductors are predicted to give rise to an increase in conductance and a suppression of quantization due to the appearance of additional conduction channels...
February 13, 2018: Nature Communications
Mark J Haykowsky, Martin Halle, Aaron Baggish
No abstract text is available yet for this article.
February 13, 2018: Circulation
Garik Torosyan, Sascha Keller, Laura Scheuer, René Beigang, Evangelos Th Papaioannou
We report on generation of pulsed broadband terahertz radiation utilizing the inverse spin hall effect in Fe/Pt bilayers on MgO and sapphire substrates. The emitter was optimized with respect to layer thickness, growth parameters, substrates and geometrical arrangement. The experimentally determined optimum layer thicknesses were in qualitative agreement with simulations of the spin current induced in the ferromagnetic layer. Our model takes into account generation of spin polarization, spin diffusion and accumulation in Fe and Pt and electrical as well as optical properties of the bilayer samples...
January 22, 2018: Scientific Reports
Mewlude Imam, Carina Höglund, Susann Schmidt, Richard Hall-Wilton, Jens Birch, Henrik Pedersen
Low-temperature chemical vapor deposition (CVD) of B-C thin films is of importance for neutron voltaics and semiconductor technology. The highly reactive trialkylboranes, with alkyl groups of 1-4 carbon atoms, are a class of precursors that have been less explored for low-temperature CVD of B-C films. Herein, we demonstrate plasma CVD of B-C thin films using triethylboron (TEB) as a single source precursor in an Ar plasma. We show that the film density and B/C ratio increases with increasing plasma power, reaching a density of 2...
January 21, 2018: Journal of Chemical Physics
María Guadalupe García, María Laura Recoder, Susana Margulies
This paper presents the results of an ethnographic study of an obstetric center within a hospital of Greater Buenos Aires and an analysis of the spatio-temporal dimension of hospital care. The fieldwork, carried out between 2007 and 2011, followed the everyday dynamics of the hospital and included observation in the obstetrics unit (waiting areas, the obstetric center where births and emergencies receive care, and the ambulatory care, ultrasound, and hospitalization rooms, among others) as well as spaces such as the appointments and statistics offices, the office of social services, the central hall, the pharmacy, and hallway waiting areas...
July 2017: Salud Colectiva
Allan Raudsepp, Lisa M Kent, Simon B Hall, Martin A K Williams
The force-extension behaviour of synthesized double-stranded DNAs (dsDNAs) designed to have 2.1% or 6.6% of the thyamine bases alkyne functionalized was studied using near infrared (NIR) optical tweezers. Measurements were carried out on substrates with and without flurophores covalently attached to the alkyne moiety over an extended force range (F=0-70 pN) and results were compared to those obtained from an unmodified control. In accordance with earlier work [1] (measured over a force range F=0-5 pN), the force-extension of the dsDNA containing 2...
January 12, 2018: Biochemical and Biophysical Research Communications
Viktor Brus, Marc A Gluba, Joerg Rappich, Felix Lang, Zakhar Kovalyuk, Pavlo Maryanchuk, Norbert H Nickel
A detailed study of hitherto unknown electrical and thermoelectric properties of graphite pencil traces on paper was carried out by measuring the Hall and Seebeck effects. We show that the combination of pencil-drawn graphite and brush-painted PEDOT:PSS films on regular office paper results in extremely simple, low-cost and environmentally friendly thermoelectric power generators with promising output characteristics at low-temperature gradients. The working characteristics can be improved even further by incorporating n-type InSe flakes...
January 16, 2018: ACS Applied Materials & Interfaces
Seung Jun Lee, Yoon Jin Jang, Han Joon Kim, Eun Suk Hwang, Seok Min Jeon, Jun Shik Kim, Taehwan Moon, Kyung-Tae Jang, Young-Chang Joo, Deok-Yong Cho, Cheol Seong Hwang
P-Type SnO thin films were deposited on Si substrate by a co-sputtering process using ce-ramic SnO and metal Sn targets at room temperature without adding oxygen. By varying the DC sputtering power applied to the Sn target while maintaining the RF power to the SnO target constant, the Sn:O ratio could vary from 56:44 to 74:26 at the as-deposited state. After the thermal annealing at 180 oC for 25 min under air atmosphere using a microwave annealing system, the films were crystallized into the tetragonal SnO while the Sn:O ratio became from 44:56 to 57:43...
January 11, 2018: ACS Applied Materials & Interfaces
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