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https://www.readbyqxmd.com/read/27925750/high-fidelity-bidirectional-nuclear-qubit-initialization-in-sic
#1
Viktor Ivády, Paul V Klimov, Kevin C Miao, Abram L Falk, David J Christle, Krisztián Szász, Igor A Abrikosov, David D Awschalom, Adam Gali
Dynamic nuclear polarization (DNP) is an attractive method for initializing nuclear spins that are strongly coupled to optically active electron spins because it functions at room temperature and does not require strong magnetic fields. In this Letter, we theoretically demonstrate that DNP, with near-unity polarization efficiency, can be generally realized in weakly coupled electron spin-nuclear spin systems. Furthermore, we theoretically and experimentally show that the nuclear spin polarization can be reversed by magnetic field variations as small as 0...
November 25, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27925737/generalized-kapchinskij-vladimirskij-distribution-and-beam-matrix-for-phase-space-manipulations-of-high-intensity-beams
#2
Moses Chung, Hong Qin, Ronald C Davidson, Lars Groening, Chen Xiao
In an uncoupled linear lattice system, the Kapchinskij-Vladimirskij (KV) distribution formulated on the basis of the single-particle Courant-Snyder invariants has served as a fundamental theoretical basis for the analyses of the equilibrium, stability, and transport properties of high-intensity beams for the past several decades. Recent applications of high-intensity beams, however, require beam phase-space manipulations by intentionally introducing strong coupling. In this Letter, we report the full generalization of the KV model by including all of the linear (both external and space-charge) coupling forces, beam energy variations, and arbitrary emittance partition, which all form essential elements for phase-space manipulations...
November 25, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27923583/drug-shortages-patients-and-health-care-providers-are-all-drawing-the-short-straw
#3
François Rinaldi, Simon de Denus, Angela Nguyen, Stanley Nattel, Jean-François Bussières
Drug shortages have been reported for > 35 years. Attention to this problem increased recently after the Sandoz crisis, in which a warning letter by the Food and Drug Administration caused supply changes that suspended the availability of numerous medications. The frequency of drug shortages has increased recently. In 2011-2012 alone, Canadian supply shortages occurred for > 1000 drugs (including 150 for cardiovascular diseases). These shortages lasted for an average of 4-5 months, increasing the workload for health care providers, producing impaired health, stress, and anxiety for patients, and increasing the risk of errors...
August 17, 2016: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/27919663/efficacy-of-low-level-laser-therapy-in-the-treatment-of-burning-mouth-syndrome-a-systematic-review
#4
REVIEW
Sadeq Ali Al-Maweri, Fawad Javed, Butchibabu Kalakonda, Nader A AlAizari, Walid Al-Soneidar, Ameen Al-Akwa
BACKGROUND: Burning mouth syndrome (BMS) is a chronic pain condition with indefinite cure, predominantly affecting post-menopausal women. The aim of this study was to systematically review the efficacy of low level laser therapy in the treatment of burning mouth syndrome (BMS). METHODS: PubMed, Embase and Scopus were searched from date of inception till and including October 2016 using various combinations of the following keywords: burning mouth syndrome, BMS, stomatodynia, laser therapy, laser treatment and phototherapy...
December 2, 2016: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/27919503/binocular-low-contrast-letter-acuity-and-the-symbol-digit-modalities-test-improve-the-ability-of-the-multiple-sclerosis-functional-composite-to-predict-disease-in-pediatric-multiple-sclerosis
#5
Amy T Waldman, Salim Chahin, Amy M Lavery, Geraldine Liu, Brenda L Banwell, Grant T Liu, Laura J Balcer
BACKGROUND: Outcome measures to capture disability, such as the Multiple Sclerosis Functional Composite (MSFC), were developed to enhance outcome measurements for clinical trials in adults with multiple sclerosis (MS). The MSFC initially included three components: a timed 25-foot walk [T25FW], 9-hole peg test [9HPT], and the Paced Auditory Serial Addition Task [PASAT]. Modifications to the original MSFC, such as adding binocular low-contrast letter acuity (LCLA) or substituting the symbol digit modalities test (SDMT) for the PASAT, improved the capacity to capture neurologic impairment in adults...
November 2016: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/27918344/implantation-of-stereoelectroencephalography-electrodes-a-systematic-review
#6
Francesco Cardinale, Giuseppe Casaceli, Fabio Raneri, Jonathan Miller, Giorgio Lo Russo
BACKGROUND: Stereoelectroencephalography (SEEG) was developed by Talairach and Bancaud in Paris in the late 1950s. Subsequently, the Talairach methodology was adopted at a number of additional centers in Europe and Canada. Technical aspects remained essentially unchanged for the following 30 years. Only in the last two decades, because of advancements in image-guided surgery systems, robotics, and computer-aided planning, use of SEEG has become more widespread, and reports describing these new developments have been published...
December 2016: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27914417/sparse-spatial-spectral-estimation-in-directional-noise-environment
#7
Long Yang, Yixin Yang, Yong Wang
White Gaussian noise assumption is widely used in the field of spatial spectral estimation. But, the practical ambient noise usually does not satisfy this assumption, which may seriously affect the performance of direction of arrival estimation. This letter presents a linear noise model that can provide a more complete description of the practical ambient noise field, and then proposes a directional noise field sparse spectrum fitting (DN-SpSF) algorithm to estimate the spatial spectral in a directional noise field...
September 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27913798/generalizability-of-the-maximum-proportional-recovery-rule-to-visuospatial-neglect-early-poststroke
#8
Caroline Winters, Erwin E H van Wegen, Andreas Daffertshofer, Gert Kwakkel
Background and objective Proportional recovery of upper-extremity motor function and aphasia after stroke may suggest common mechanisms for spontaneous neurobiological recovery. This study aimed to investigate if the proportional recovery rule also applies to visuospatial neglect (VSN) in right-hemispheric first-ever ischemic stroke patients and explored the possible common underlying mechanisms. Methods Patients with upper-limb paresis and VSN were included. Recovery defined as the change in Letter Cancellation Test (LCT) score at ~8 days and 6 months poststroke...
December 2, 2016: Neurorehabilitation and Neural Repair
https://www.readbyqxmd.com/read/27913156/the-oral-spelling-profile-of-posterior-cortical-atrophy-and-the-nature-of-the-graphemic-representation
#9
Silvia Primativo, Keir X X Yong, Timothy J Shakespeare, Sebastian J Crutch
Spelling is a complex cognitive task where central and peripheral components are involved in engaging resources from many different cognitive processes. The present paper aims to both characterize the oral spelling deficit in a population of patients affected by a neurodegenerative condition and to clarify the nature of the graphemic representation within the currently available spelling models. Indeed, the nature of graphemic representation as a linear or multi-componential structure is still debated. Different hypotheses have been raised about its nature in the orthographic lexicon, with one positing that graphemes are complex objects whereby quantity and identity are separately represented in orthographic representations and can thus be selectively impaired...
November 29, 2016: Neuropsychologia
https://www.readbyqxmd.com/read/27912776/improving-stroke-prevention-therapy-for-patients-with-atrial-fibrillation-in-primary-care-protocol-for-a-pragmatic-cluster-randomized-trial
#10
Theresa M Lee, Noah M Ivers, Sacha Bhatia, Debra A Butt, Paul Dorian, Liisa Jaakkimainen, Kori Leblanc, Dan Legge, Dante Morra, Alissia Valentinis, Laura Wing, Jacqueline Young, Karen Tu
BACKGROUND: The prevalence of atrial fibrillation (AF) is growing as the population ages, and at least 15% of ischemic strokes are attributed to AF. However, many high-risk AF patients are not offered guideline-recommended stroke prevention therapy due to a variety of system, provider, and patient-level barriers. METHODS: We will conduct a pragmatic, cluster-randomized controlled trial randomizing primary care clinics to test a "toolkit" of quality improvement interventions in primary care...
December 3, 2016: Implementation Science: IS
https://www.readbyqxmd.com/read/27911562/macroscopic-model-for-head-on-binary-droplet-collisions-in-a-gaseous-medium
#11
Jie Li
In this Letter, coalescence-bouncing transitions of head-on binary droplet collisions are predicted by a novel macroscopic model based entirely on fundamental laws of physics. By making use of the lubrication theory of Zhang and Law [Phys. Fluids 23, 042102 (2011)], we have modified the Navier-Stokes equations to accurately account for the rarefied nature of the interdroplet gas film. Through the disjoint pressure model, we have incorporated the intermolecular van der Waals forces. Our model does not use any adjustable (empirical) parameters...
November 18, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27911526/dressed-hard-states-and-black-hole-soft-hair
#12
Mehrdad Mirbabayi, Massimo Porrati
A recent, intriguing Letter by Hawking, Perry, and Strominger suggests that soft photons and gravitons can be regarded as black hole hair and may be relevant to the black hole information paradox. In this Letter we make use of factorization theorems for infrared divergences of the S matrix to argue that by appropriately dressing in and out hard states, the soft-quanta-dependent part of the S matrix becomes essentially trivial. The information paradox can be fully formulated in terms of dressed hard states, which do not depend on soft quanta...
November 18, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27909535/search-for-the-ideal-antithrombotic-drug-utopian-task-likely-is-implemented-already
#13
REVIEW
Petras Stirbys Md PhD
Atrial fibrillation is the most prevalent cardiac arrhythmia with a high risk of ischemic stroke. Thromboprophylaxis plays a key role in prevention of cardioembolic and non-cardioembolic events. Oral antithrombotic drugs are most often used to reduce hypercoagulable state. Patients may suffer from both under- and overtreatment compromising the outcomes. Medication peculiarities at large are well-known and widely debated. Non-adherence to antithrombotic drug regimen poses a significant risk of stroke. There is a pressing need for more detailed delineation of risk factors, namely by incorporation of the letter "N" (meaning "Non-adherence to drug therapy") into the well-known risk score alphanumeric display: CHA2DS2N-VASc...
August 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27906203/two-phase-slipi-for-instantaneous-lif-and-mie-imaging-of-transient-fuel-sprays
#14
Michael Storch, Yogeshwar Nath Mishra, Matthias Koegl, Elias Kristensson, Stefan Will, Lars Zigan, Edouard Berrocal
We report in this Letter a two-phase structured laser illumination planar imaging [two-pulse SLIPI (2p-SLIPI)] optical setup where the "lines structure" is spatially shifted by exploiting the birefringence property of a calcite crystal. By using this optical component and two cross-polarized laser pulses, the shift of the modulated pattern is not "time-limited" anymore. Consequently, two sub-images with spatially mismatched phases can be recorded within a few hundred of nanoseconds only, freezing the motion of the illuminated transient flow...
December 1, 2016: Optics Letters
https://www.readbyqxmd.com/read/27905159/the-interaction-of-sleep-and-amyloid-deposition-on-cognitive-performance
#15
Jennifer R V Molano, Catherine M Roe, Yo-El S Ju
Sleep difficulties are emerging as a risk factor for dementia. This study examined the effect of sleep and amyloid deposition on cognitive performance in cognitively normal adults. Sleep efficiency was determined by actigraphy. Cerebrospinal fluid Aβ42 levels <500 pg mL(-1) , indicating amyloid deposition, was present in 23 participants. Psychometric tests included the Free and Cued Selective Reminding Test, Trail Making Test A and B, Animal Fluency, Letter Number Sequencing, and the Mini Mental State Examination...
December 1, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/27900585/divided-attention-reduces-resistance-to-distraction-at-encoding-but-not-retrieval
#16
Jennifer C Weeks, Lynn Hasher
Older adults show implicit memory for previously seen distraction, an effect attributed to poor attentional control. It is unclear whether this effect results from lack of control over encoding during the distraction task, lack of retrieval constraint during the test task, or both. In the present study, we simulated poor distraction control in young adults using divided attention at encoding, at retrieval, at both times, or not at all. The encoding task was a 1-back task on pictures with distracting superimposed letter strings, some of which were words...
November 29, 2016: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/27897670/boosting-cognition-effects-of-multiple-session-transcranial-direct-current-stimulation-on-working-memory
#17
Lotte J Talsma, Henryk A Kroese, Heleen A Slagter
Transcranial direct current stimulation (tDCS) is a promising tool for neurocognitive enhancement. Several studies have shown that just a single session of tDCS over the left dorsolateral pFC (lDLPFC) can improve the core cognitive function of working memory (WM) in healthy adults. Yet, recent studies combining multiple sessions of anodal tDCS over lDLPFC with verbal WM training did not observe additional benefits of tDCS in subsequent stimulation sessions nor transfer of benefits to novel WM tasks posttraining...
November 29, 2016: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/27895471/adherence-satisfaction-and-preferences-for-treatment-in-patients-with-psoriasis-in-the-european-union-a-systematic-review-of-the-literature
#18
I Belinchón, R Rivera, C Blanch, M Comellas, L Lizán
BACKGROUND AND OBJECTIVE: Adherence to treatment in patients with psoriasis is often poor. An investigation of patient preferences and satisfaction with treatment may be important, based on the expected correlation with therapy compliance. This paper aims to examine and describe the current literature on patient preferences, satisfaction and adherence to treatment for psoriasis in the European Union (EU). METHODS: Electronic searches were conducted using PubMed, ISI Web of Knowledge, Scopus, Spanish databases and Google Scholar...
2016: Patient Preference and Adherence
https://www.readbyqxmd.com/read/27893623/efficacy-and-safety-of-intravitreal-conbercept-injections-in-macular-edema-secondary-to-retinal-vein-occlusion
#19
Zuhua Sun, Haiying Zhou, Bing Lin, Xuan Jiao, Yingdong Luo, Feng Zhang, Shanshan Tao, Quan Wu, Zunhong Ke, Xiaoling Liu
PURPOSE: To assess the efficacy and safety of intravitreal conbercept injections in patients with macular edema secondary to retinal vein occlusion (RVO). METHODS: A prospective, Phase II clinical trial was performed on 60 patients with macular edema secondary to RVO. Thirty patients had branch RVO (BRVO) and 30 had central RVO (CRVO). Each patient received intravitreal injections of conbercept monthly up to 3 months, followed by monthly evaluation and injection pro re nata to Month 9...
November 23, 2016: Retina
https://www.readbyqxmd.com/read/27892410/short-term-no2-exposure-is-associated-with-long-chain-fatty-acids-in-prospective-cohorts-from-augsburg-germany-results-from-an-analysis-of-138-metabolites-and-three-exposures
#20
Cavin K Ward-Caviness, Susanne Breitner, Kathrin Wolf, Josef Cyrys, Gabi Kastenmüller, Rui Wang-Sattler, Alexandra Schneider, Annette Peters
BACKGROUND: Short-term exposure to air pollution is associated with morbidity and mortality. Metabolites are intermediaries in biochemical processes, and associations between air pollution and metabolites can yield unique mechanistic insights. METHODS: We used independent cross-sectional samples with targeted metabolomics (138 metabolites across five metabolite classes) from three cohort studies, each a part of the Cooperative Health Research in the Region of Augsburg (KORA)...
October 2016: International Journal of Epidemiology
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