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https://www.readbyqxmd.com/read/29448376/matrix-product-algorithm-for-stochastic-dynamics-on-networks-applied-to-nonequilibrium-glauber-dynamics
#1
Thomas Barthel, Caterina De Bacco, Silvio Franz
We introduce and apply an efficient method for the precise simulation of stochastic dynamical processes on locally treelike graphs. Networks with cycles are treated in the framework of the cavity method. Such models correspond, for example, to spin-glass systems, Boolean networks, neural networks, or other technological, biological, and social networks. Building upon ideas from quantum many-body theory, our approach is based on a matrix product approximation of the so-called edge messages-conditional probabilities of vertex variable trajectories...
January 2018: Physical Review. E
https://www.readbyqxmd.com/read/29448233/earth-s-field-nmr-detection-of-oil-under-arctic-ice-water-suppression
#2
Mark S Conradi, Stephen A Altobelli, Nicholas J Sowko, Susan H Conradi, Eiichi Fukushima
Earth's field NMR has been developed to detect oil trapped under or in Arctic sea-ice. A large challenge, addressed here, is the suppression of the water signal that dominates the oil signal. Selective suppression of water is based on relaxation time T 1 because of the negligible chemical shifts in the weak earth's magnetic field, making all proton signals overlap spectroscopically. The first approach is inversion-null recovery, modified for use with pre-polarization. The requirements for efficient inversion over a wide range of B 1 and subsequent adiabatic reorientation of the magnetization to align with the static field are stressed...
February 7, 2018: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/29447415/motivational-interviewing-to-increase-outpatient-attendance-for-adolescent-psychiatric-patients
#3
Laurel Chiappetta, Stacy Stark, Khadejah F Mahmoud, Kyle R Bahnsen, Ann M Mitchell
Motivational interviewing (MI) is a therapeutic technique that has been demonstrated to increase adherence to various treatment regimens. Nonattendance at outpatient appointments is associated with read-mission to psychiatric hospitals. The purpose of the current study was to examine the effectiveness of MI in promoting treatment adherence and increasing pediatric attendance rates at patients' first follow-up appointment after inpatient admission. A sample of 111 patients discharged from one of two child and adolescent units at an urban, inpatient psychiatric hospital in Southwestern Pennsylvania participated in the MI discharge process...
February 15, 2018: Journal of Psychosocial Nursing and Mental Health Services
https://www.readbyqxmd.com/read/29445967/the-use-of-free-nonvascularized-fibular-graft-in-the-induced-membrane-technique-to-manage-post-traumatic-bone-defects
#4
Barakat El-Alfy, Mazen Abulsaad, Wail Lotfy Abdelnaby
PURPOSE: The aim of the present study is to assess the results of free nonvascularized fibular graft in the induced membrane technique to manage bone defects. MATERIALS AND METHODS: Fifteen patients with segmental skeletal defects were treated by the induced membrane technique using free nonvascularized fibular graft. The ages ranged from 20 to 48 years with an average of 32 years. The cause of the defects was post-traumatic bone loss in all cases. The defects were located in the distal femur in nine cases, proximal tibia in two cases and middle third of the tibia in four cases...
February 14, 2018: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/29445961/application-of-combined-porous-tantalum-scaffolds-loaded-with-bone-morphogenetic-protein-7-to-repair-of-osteochondral-defect-in-rabbits
#5
Qian Wang, Hui Zhang, Hongquan Gan, Hui Wang, Qijia Li, Zhiqiang Wang
PURPOSE: Porous tantalum (PT) has been widely used in orthopaedic applications for low modulus of elasticity, excellent biocompatibility, and the microstructures similar to cancellous bone. In order to improve the biological activity of PT, biologically active factors can be combined with the material. The purpose of this study was to investigate if bone morphogenetic protein 7 (BMP-7) modifications could enhance the repairing of cartilage of PT in osteochondral defect in medial femoral condyle of rabbits...
February 14, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29444019/group-refractive-index-quantification-using-a-fourier-domain-short-coherence-sagnac-interferometer
#6
Risto Montonen, Ivan Kassamakov, Peter Lehmann, Kenneth Österberg, Edward Hæggström
The group refractive index is important in length calibration of Fourier domain interferometers by transparent transfer standards. We demonstrate accurate group refractive index quantification using a Fourier domain short coherence Sagnac interferometer. Because of a justified linear length calibration function, the calibration constants cancel out in the evaluation of the group refractive index, which is then obtained accurately from two uncalibrated lengths. Measurements of two standard thickness coverslips revealed group indices of 1...
February 15, 2018: Optics Letters
https://www.readbyqxmd.com/read/29440747/direct-measurement-of-superdiffusive-energy-transport-in-disordered-granular-chains
#7
Eunho Kim, Alejandro J Martínez, Sean E Phenisee, P G Kevrekidis, Mason A Porter, Jinkyu Yang
Energy transport properties in heterogeneous materials have attracted scientific interest for more than half of a century, and they continue to offer fundamental and rich questions. One of the outstanding challenges is to extend Anderson theory for uncorrelated and fully disordered lattices in condensed-matter systems to physical settings in which additional effects compete with disorder. Here we present the first systematic experimental study of energy transport and localization properties in simultaneously disordered and nonlinear granular crystals...
February 13, 2018: Nature Communications
https://www.readbyqxmd.com/read/29440490/nuclear-quantum-effect-with-pure-anharmonicity-and-the-anomalous-thermal-expansion-of-silicon
#8
D S Kim, O Hellman, J Herriman, H L Smith, J Y Y Lin, N Shulumba, J L Niedziela, C W Li, D L Abernathy, B Fultz
Despite the widespread use of silicon in modern technology, its peculiar thermal expansion is not well understood. Adapting harmonic phonons to the specific volume at temperature, the quasiharmonic approximation, has become accepted for simulating the thermal expansion, but has given ambiguous interpretations for microscopic mechanisms. To test atomistic mechanisms, we performed inelastic neutron scattering experiments from 100 K to 1,500 K on a single crystal of silicon to measure the changes in phonon frequencies...
February 13, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29438959/retrospective-analysis-of-the-national-impact-of-industrial-action-by-english-junior-doctors-in-2016
#9
Daniel Furnivall, Alex Bottle, Paul Aylin
OBJECTIVES: To examine the impacts of the four episodes of industrial action by English junior doctors in early 2016. DESIGN: Descriptive retrospective study of admitted patient care, accident and emergency (A&E) and outpatient activity in English hospitals. SETTING: All hospitals across England. PARTICIPANTS: All patients who attended A&E or outpatient appointments or those who were admitted to hospital during the 3-week period surrounding each of the four strikes (12 January, 10 February, 9-10 March and 26-27 April, excluding weekends)...
February 8, 2018: BMJ Open
https://www.readbyqxmd.com/read/29436739/magnetic-slow-relaxation-in-a-metal-organic-framework-made-of-chains-of-ferromagnetically-coupled-single-molecule-magnets
#10
Gang Huang, Guglielmo Fernandez-Garcia, Insa Badiane, Magatte Camara, Stéphane Freslon, Olivier Guillou, Carole Daiguebonne, Federico Totti, Olivier Cador, Thierry Guizouarn, Boris Le Guennic, Kevin Bernot
We report the study of a Dy-based metal-organic framework (MOF), with unprecedented magnetic properties. The compound is made of nine-coordinated DyIII magnetic building blocks (MBBs) with poor intrinsic single-molecule magnet behaviour. However, the MOF architecture constrains the MBBs in a one-dimensional structure that induces a ferromagnetic coupling between them. Overall, the material shows a magnetic slow relaxation in absence of external static field and a hysteretic behaviour at 0.5K. Low temperature magnetic studies, diamagnetic doping and ab-initio calculations highlight the crucial role played by the Dy-Dy ferromagnetic interaction...
February 13, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29436486/randomised-double-blind-placebo-controlled-crossover-study-of-single-dose-guanfacine-in-unilateral-neglect-following-stroke
#11
Edwin S Dalmaijer, Korina M S Li, Nikos Gorgoraptis, Alexander P Leff, David L Cohen, Andrew D Parton, Masud Husain, Paresh A Malhotra
OBJECTIVE: Unilateral neglect is a poststroke disorder that impacts negatively on functional outcome and lacks established, effective treatment. This multicomponent syndrome is characterised by a directional bias of attention away from contralesional space, together with impairments in several cognitive domains, including sustained attention and spatial working memory. This study aimed to test the effects of guanfacine, a noradrenergic alpha-2A agonist, on ameliorating aspects of neglect...
February 7, 2018: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/29434713/paclitaxel-inhibits-breast-cancer-metastasis-via-suppression-of-aurora-kinase-mediated-cofilin-1-activity
#12
Yue Zhang, Yaoyi Wang, Jun Xue
The main problem in breast cancer treatment is the recurrence of tumor growth and metastases. Previous studies have suggested that Paclitaxel is widely used to treat various cancers. The present study analyzed the potential signaling pathway of Paclitaxel-inhibited breast cancer metastasis. It was demonstrated that Paclitaxel treatment significantly inhibited growth of breast cancer cell lines including MCF-7 and SKBR3 cells. Results demonstrated that Paclitaxel significantly inhibited breast cancer cell migration and invasion...
February 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29434337/detection-of-genetic-purging-and-predictive-value-of-purging-parameters-estimated-in-pedigreed-populations
#13
Eugenio López-Cortegano, Diego Bersabé, Jinliang Wang, Aurora García-Dorado
The consequences of inbreeding for fitness are important in evolutionary and conservation biology, but can critically depend on genetic purging. However, estimating purging has proven elusive. Using PURGd software, we assess the performance of the Inbreeding-Purging (IP) model and of ancestral inbreeding (Fa) models to detect purging in simulated pedigreed populations, and to estimate parameters that allow reliably predicting the evolution of fitness under inbreeding. The power to detect purging in a single small population of size N is low for both models during the first few generations of inbreeding (t ≈ N/2), but increases for longer periods of slower inbreeding and is, on average, larger for the IP model...
February 13, 2018: Heredity
https://www.readbyqxmd.com/read/29433177/trabecular-anatomy-of-the-axis-vertebra-a-study-of-shaded-volume-rendered-computed-tomography-images
#14
K Venugopal Menon, Sameer B Raniga
BACKGROUND: To date, trabecular morphology studies have been conducted on thin-section computed tomography (CT) scans of cadaveric bone. Here we describe the trabecular anatomy of the axis vertebra as revealed by an innovative imaging tool. METHODS: Ten patients who underwent thin-slice CT scans for suspected cervical spine injury were prospectively subjected to shaded volume-rendered 3-dimensional reconstruction of the images. The trabecular anatomy thus depicted was recreated, and the mechanical vectors were deduced independently by a senior radiologist and spine surgeon and then matched...
February 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29427750/is-dynamic-locking-plate-targon-fn-a-better-choice-for-treating-of-intracapsular-hip-fracture-a-meta-analysis
#15
REVIEW
Hao Yin, Zhengjun Pan, Hua Jiang
PURPOSE: The aim of this study was to assess the outcomes of dynamic locking plate (Targon FN) and other alternative implant (cannulated cancellous screws or sliding hip screw) for treating of intracapsular hip fracture. METHODS: Relevant clinical trials on the dynamic locking plate and alternative implant treatment for intracapsular hip fracture were retrieved through searching the databases, PubMed, Embase and the Cochrane Central Register of Controlled Trials up to August 2017...
February 7, 2018: International Journal of Surgery
https://www.readbyqxmd.com/read/29427379/phase-correcting-non-local-means-filtering-for-diffusion-weighted-imaging-of-the-spinal-cord
#16
Sevgi Gokce Kafali, Tolga Çukur, Emine Ulku Saritas
PURPOSE: DWI suffers from low SNR when compared to anatomical MRI. To maintain reasonable SNR at relatively high spatial resolution, multiple acquisitions must be averaged. However, subject motion or involuntary physiological motion during diffusion-sensitizing gradients cause phase offsets among acquisitions. When the motion is localized to a small region, these phase offsets become particularly problematic. Complex averaging of acquisitions lead to cancellations from these phase offsets, whereas magnitude averaging results in noise amplification...
February 9, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29427201/use-of-fully-threaded-cannulated-screws-decreases-femoral-neck-shortening-after-fixation-of-femoral-neck-fractures
#17
Yoram A Weil, Feras Qawasmi, Meir Liebergall, Rami Mosheiff, Amal Khoury
BACKGROUND: Femoral neck fractures (FNF) are becoming increasingly common as population ages. Nondisplaced fractures are commonly treated by cancellous, parallel placed, partially threaded cannulated screws (PTS). This allows controlled fracture impaction. However, sliding implants can lead to femoral neck shortening (FNS) that has been shown to be correlated with reduced quality of life and impaired gait pattern. Recently, in our institution we have changed the fixation of FNF to fully threaded screws (FTS) with or without an additional partially threaded screw in order to minimize this phenomenon...
February 9, 2018: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29426683/cardiothoracic-mri-in-the-icu-a-10-year-experience
#18
Narmadan Kumarasamy, Nima Tishbi, Shey Mukundan, Ariel Shiloh, Jeffrey M Levsky, Linda B Haramati
RATIONALE AND OBJECTIVE: The objective of this study was to identify the feasibility and pitfalls of cardiothoracic magnetic resonance imaging (MRI) in intensive care unit (ICU) patients. MATERIALS AND METHODS: This retrospective study identified adult ICU patients scheduled for cardiothoracic MRIs during a 10-year study period. ICU patients scheduled for brain MRIs served as a comparison group. A chart review was performed to identify factors impacting a patient's ability to undergo an MRI...
February 6, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29424693/improved-contrast-enhanced-ultrasound-imaging-with-multiplane-wave-imaging
#19
Ping Gong, Pengfei Song, Shigao Chen
Contrast-enhanced ultrasound (CEUS) imaging has great potential for use in new ultrasound clinical applications such as myocardial perfusion imaging and abdominal lesion characterization. In CEUS imaging, contrast agents (i.e., microbubbles) are used to improve contrast between blood and tissue because of their high nonlinearity under low ultrasound pressure. However, the quality of CEUS imaging sometimes suffers from a low signal-to-noise ratio (SNR) in deeper imaging regions when a low mechanical index (MI) is used to avoid microbubble disruption, especially for imaging at off-resonance transmit frequencies...
February 2018: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/29423027/targeting-the-t-lak-cell-originated-protein-kinase-by-ots964-shrinks-the-size-of-power-law-coded-heterogeneous-glioma-stem-cell-populations
#20
Michiya Sugimori, Yumiko Hayakawa, Masaki Koh, Tomohide Hayashi, Ryoi Tamura, Satoshi Kuroda
Glioblastoma resists chemoradiotherapy, then, recurs to be a fatal space-occupying lesion. The recurrence is caused by re-growing cell populations such as glioma stem cells (GSCs), suggesting that GSC populations should be targeted. This study addressed whether a novel anti-cancer drug, OTS964, an inhibitor for T-LAK cell originated protein kinase (TOPK), is effective in reducing the size of the heterogeneous GSC populations, a power-law coded heterogeneous GSC populations consisting of glioma sphere (GS) clones, by detailing quantitative growth properties...
January 9, 2018: Oncotarget
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