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https://www.readbyqxmd.com/read/28934523/sleep-stage-transition-dynamics-reveal-specific-stage-2-vulnerability-in-insomnia
#1
Yishul Wei, Michele A Colombo, Jennifer R Ramautar, Tessa F Blanken, Ysbrand D van der Werf, Kai Spiegelhalder, Bernd Feige, Dieter Riemann, Eus J W Van Someren
Study Objectives: Objective sleep impairments in insomnia disorder (ID) are insufficiently understood. The present study evaluated whether whole-night sleep stage dynamics derived from polysomnography (PSG) differ between people with ID and matched controls and whether sleep stage dynamic features discriminate them better than conventional sleep parameters. Methods: Eighty-eight participants aged 21-70 years, including 46 with ID and 42 age- and sex-matched controls without sleep complaints, were recruited through www...
September 1, 2017: Sleep
https://www.readbyqxmd.com/read/28934308/devices-and-tasks-involved-in-the-objective-assessment-of-standing-dynamic-balancing-a-systematic-literature-review
#2
Bálint Petró, Alexandra Papachatzopoulou, Rita M Kiss
BACKGROUND: Static balancing assessment is often complemented with dynamic balancing tasks. Numerous dynamic balancing assessment methods have been developed in recent decades with their corresponding balancing devices and tasks. OBJECTIVE: The aim of this systematic literature review is to identify and categorize existing objective methods of standing dynamic balancing ability assessment with an emphasis on the balancing devices and tasks being used. DATA SOURCES: Three major scientific literature databases (Science Direct, Web of Science, PLoS ONE) and additional sources were used...
2017: PloS One
https://www.readbyqxmd.com/read/28934163/a-parameter-communication-optimization-strategy-for-distributed-machine-learning-in-sensors
#3
Jilin Zhang, Hangdi Tu, Yongjian Ren, Jian Wan, Li Zhou, Mingwei Li, Jue Wang, Lifeng Yu, Chang Zhao, Lei Zhang
In order to utilize the distributed characteristic of sensors, distributed machine learning has become the mainstream approach, but the different computing capability of sensors and network delays greatly influence the accuracy and the convergence rate of the machine learning model. Our paper describes a reasonable parameter communication optimization strategy to balance the training overhead and the communication overhead. We extend the fault tolerance of iterative-convergent machine learning algorithms and propose the Dynamic Finite Fault Tolerance (DFFT)...
September 21, 2017: Sensors
https://www.readbyqxmd.com/read/28933839/flexible-and-comprehensive-implementation-of-md-pmm-approach-in-a-general-and-robust-code
#4
Oliver Carrillo-Parramon, Sara Del Galdo, Massimiliano Aschi, Giordano Mancini, Andrea Amadei, Vincenzo Barone
The Perturbed Matrix Method (PMM) approach to be used in combination with Molecular Dynamics (MD) trajectories (MD-PMM) has been recoded from scratch, improved in several aspects, and implemented in the Gaussian suite of programs for allowing user friendly and yet flexible tool to estimate quantum chemistry observables in complex systems in condensed phases. Particular attention has been devoted to a description of rigid and flexible quantum centers together with powerful essential dynamics and clustering approaches...
September 21, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28933829/synthesis-crystal-structure-and-magnetic-properties-of-the-highly-frustrated-orthorhombic-li4mgreo6
#5
JoAnna Milam-Guerrero, Charles J Bloed, Phuong-Hieu T Nguyen, Gia T Tran, William P Martin, Demetrios V Papakostas, Jefferson Toro, Murray N Wilson, Jeremy P Carlo, Graeme M Luke, Brent C Melot, Jiyeong Gu, Shahab Derakhshan
In an effort to understand the structure-property relationship in magnetically frustrated systems, an orthorhombic analog of the S = 1/2 Re-based oxide Li4MgReO6 has been successfully synthesized and its physical properties were investigated. Li4MgReO6 had been previously synthesized in a monoclinic system in an ordered NaCl structure type. That system was shown to exhibit spin glass behavior below ∼12 K. The crystal structure of the latter phase was determined using powder X-ray diffraction data. A structural model was refined in the orthorhombic Fddd space group that resulted in cell dimensions of a = 5...
September 21, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28933200/infrared-extinction-performance-of-randomly-oriented-microbial-clustered-agglomerate-materials
#6
Le Li, Yihua Hu, Youlin Gu, Xinying Zhao, Shilong Xu, Lei Yu, Zhi Ming Zheng, Peng Wang
In this study, the spatial structure of randomly distributed clusters of fungi An0429 spores was simulated using a cluster aggregation (CCA) model, and the single scattering parameters of fungi An0429 spores were calculated using the discrete dipole approximation (DDA) method. The transmittance of 10.6 µm infrared (IR) light in the aggregated fungi An0429 spores swarm is simulated by using the Monte Carlo method. Several parameters that affect the transmittance of 10.6 µm IR light, such as the number and radius of original fungi An0429 spores, porosity of aggregated fungi An0429 spores, and density of aggregated fungi An0429 spores of the formation aerosol area were discussed...
January 1, 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28933018/-18-f-fluoromisonidazole-pet-in-rectal-cancer
#7
Tanuj Puri, Tessa A Greenhalgh, James M Wilson, Jamie Franklin, Lia Mun Wang, Victoria Strauss, Chris Cunningham, Mike Partridge, Tim Maughan
BACKGROUND: There is an increasing interest in developing predictive biomarkers of tissue hypoxia using functional imaging for personalised radiotherapy in patients with rectal cancer that are considered for neoadjuvant chemoradiotherapy (CRT). The study explores [(18)F]fluoromisonidazole ([(18)F]FMISO) positron emission tomography (PET) scans for predicting clinical response in rectal cancer patients receiving neoadjuvant CRT. METHODS: Patients with biopsy-proven rectal adenocarcinoma were imaged at 0-45 min, 2 and 4 h, at baseline and after 8-10 fractions of CRT (week 2)...
September 20, 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28932849/new-insights-into-single-compound-and-binary-adsorption-of-copper-and-lead-ions-on-a-treated-sea-mango-shell-experimental-and-theoretical-studies
#8
Lotfi Sellaoui, Felycia Edi Soetaredjo, Suryadi Ismadji, Éder Cláudio Lima, Guilherme L Dotto, Abdelmottaleb Ben Lamine, Alessandro Erto
Herein, adsorption isotherms of Pb(ii) and Cu(ii) ions on treated sea mango fruit in both single-compound and binary systems were experimentally realized at different temperatures in the range of 30-50 °C. Experimental results show that adsorption of Pb(ii) was more as compared to that of Cu(ii) ions; however, for both ions, a significant reduction in the adsorption capacity was observed in the binary system as compared to that in the single-compound systems. Moreover, under all the investigated conditions, adsorption seems to be promoted by an increase in temperature...
September 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28932826/interobserver-variation-of-the-bolus-and-burst-method-for-pancreatic-perfusion-with-dynamic-contrast-enhanced-ultrasound
#9
Marcus Stangeland, Trond Engjom, Martin Mezl, Radovan Jirik, Odd Helge Gilja, Georg Dimcevski, Kim Nylund
PURPOSE: Dynamic contrast-enhanced ultrasound (DCE-US) can be used for calculating organ perfusion. By combining bolus injection with burst replenishment, the actual mean transit time (MTT) can be estimated. Blood volume (BV) can be obtained by scaling the data to a vessel on the imaging plane. The study aim was to test interobserver agreement for repeated recordings using the same ultrasound scanner and agreement between results on two different scanner systems. MATERIALS AND METHODS: Ten patients under evaluation for exocrine pancreatic failure were included...
June 2017: Ultrasound International Open
https://www.readbyqxmd.com/read/28932753/effect-of-iop-based-infusion-system-with-and-without-balanced-phaco-tip-on-cumulative-dissipated-energy-and-estimated-fluid-usage-in-comparison-to-gravity-fed-infusion-in-torsional-phacoemulsification
#10
Praveen K Malik, Taru Dewan, Arun Kr Patidar, Ekta Sain
BACKGROUND: To evaluate the effect of three different combinations of tip designs and infusion systems in torsional phacoemulsification (INFINITI and CENTURION) in patients with cataract. According to the manufacturer, two unique improvements in the Centurion are: active fluid dynamic management system and use of an intrepid balanced tip. The study specifically aimed to evaluate the beneficial effects, if any, of change in tip design and infusion system individually and in combination on both per-operative parameters as well as endothelial health over 6 months...
2017: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/28932538/the-value-of-delayed-phase-enhanced-imaging-in-malignant-pleural-mesothelioma
#11
Akash M Patel, Ian Berger, E Paul Wileyto, Urooj Khalid, Drew A Torigian, Arun C Nachiappan, Eduardo M Barbosa, Warren B Gefter, Maya Galperin-Aizenberg, Narainder K Gupta, Charles B Simone, Andrew R Haas, Evan W Alley, Sunil Singhal, Keith A Cengel, Sharyn I Katz
BACKGROUND: Cross-sectional imaging of malignant pleural mesothelioma (MPM) can underestimate the presence of local tumor invasion. Since accurate staging is vital optimal choice of therapy, techniques that optimize pleural imaging are needed. Here we estimate the optimal timing of MPM enhancement on magnetic resonance imaging (MRI). METHODS: All MPM patients with intravenous (IV) contrast enhanced staging MRI between 2000-2016 at our institution were retrospectively selected for image analysis...
August 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28932237/a-new-hybrid-model-fpa-svm-considering-cointegration-for-particular-matter-concentration-forecasting-a-case-study-of-kunming-and-yuxi-china
#12
Weide Li, Demeng Kong, Jinran Wu
Air pollution in China is becoming more serious especially for the particular matter (PM) because of rapid economic growth and fast expansion of urbanization. To solve the growing environment problems, daily PM2.5 and PM10 concentration data form January 1, 2015, to August 23, 2016, in Kunming and Yuxi (two important cities in Yunnan Province, China) are used to present a new hybrid model CI-FPA-SVM to forecast air PM2.5 and PM10 concentration in this paper. The proposed model involves two parts. Firstly, due to its deficiency to assess the possible correlation between different variables, the cointegration theory is introduced to get the input-output relationship and then obtain the nonlinear dynamical system with support vector machine (SVM), in which the parameters c and g are optimized by flower pollination algorithm (FPA)...
2017: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28932236/quantitative-evaluation-of-temporal-regularizers-in-compressed-sensing-dynamic-contrast-enhanced-mri-of-the-breast
#13
Dong Wang, Lori R Arlinghaus, Thomas E Yankeelov, Xiaoping Yang, David S Smith
PURPOSE: Dynamic contrast enhanced magnetic resonance imaging (DCE-MRI) is used in cancer imaging to probe tumor vascular properties. Compressed sensing (CS) theory makes it possible to recover MR images from randomly undersampled k-space data using nonlinear recovery schemes. The purpose of this paper is to quantitatively evaluate common temporal sparsity-promoting regularizers for CS DCE-MRI of the breast. METHODS: We considered five ubiquitous temporal regularizers on 4...
2017: International Journal of Biomedical Imaging
https://www.readbyqxmd.com/read/28932213/petri-net-based-model-of-helicobacter-pylori-mediated-disruption-of-tight-junction-proteins-in-stomach-lining-during-gastric-carcinoma
#14
Anam Naz, Ayesha Obaid, Faryal M Awan, Aqsa Ikram, Jamil Ahmad, Amjad Ali
Tight junctions help prevent the passage of digestive enzymes and microorganisms through the space between adjacent epithelial cells lining. However, Helicobacter pylori encoded virulence factors negatively regulate these tight junctions and contribute to dysfunction of gastric mucosa. Here, we have predicted the regulation of important tight junction proteins, such as Zonula occludens-1, Claudin-2 and Connexin32 in the presence of pathogenic proteins. Molecular events such as post translational modifications and crosstalk between phosphorylation, O-glycosylation, palmitoylation and methylation are explored which may compromise the integrity of these tight junction proteins...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28931946/comparison-of-perfusion-models-for-quantitative-t1-weighted-dce-mri-of-rectal-cancer
#15
Tanja Gaa, Wiebke Neumann, Sonja Sudarski, Ulrike I Attenberger, Stefan O Schönberg, Lothar R Schad, Frank G Zöllner
In this work, the two compartment exchange model and two compartment uptake model were applied to obtain quantitative perfusion parameters in rectum carcinoma and the results were compared to those obtained by the deconvolution algorithm. Eighteen patients with newly diagnosed rectal carcinoma underwent 3 T MRI of the pelvis including a T1 weighted dynamic contrastenhanced (DCE) protocol before treatment. Mean values for Plasma Flow (PF), Plasma Volume (PV) and Mean Transit Time (MTT) were obtained for all three approaches and visualized in parameter cards...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28931932/decoherence-control-of-nitrogen-vacancy-centers
#16
Chao Lei, Shijie Peng, Chenyong Ju, Man-Hong Yung, Jiangfeng Du
Quantum mechanical systems lose coherence through interacting with external environments-a process known as decoherence. Although decoherence is detrimental for most of the tasks in quantum information processing, a substantial degree of decoherence is crucial for boosting the efficiency of quantum processes, for example, in quantum biology and other open systems. The key to the success in simulating those open quantum systems is therefore the ability of controlling decoherence, instead of eliminating it. Motivated by simulating quantum open systems with Nitrogen-Vacancy centers, which has become an increasingly important platform for quantum information processing tasks, we developed a new set of steering pulse sequences for controlling various coherence times of Nitrogen-Vacancy centers; our method is based on a hybrid approach that exploits ingredients in both digital and analog quantum simulations to dynamically couple or decouple the system with the physical environment...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28931836/matching-dmft-calculations-with-photoemission-spectra-of-heavy-fermion-insulators-universal-properties-of-the-near-gap-spectra-of-smb6
#17
Chul-Hee Min, F Goth, P Lutz, H Bentmann, B Y Kang, B K Cho, J Werner, K-S Chen, F Assaad, F Reinert
Paramagnetic heavy fermion insulators consist of fully occupied quasiparticle bands inherent to Fermi liquid theory. The gap emergence below a characteristic temperature is the ultimate sign of coherence for a many-body system, which in addition can induce a non-trivial band topology. Here, we demonstrate a simple and efficient method to compare a model study and an experimental result for heavy fermion insulators. The temperature dependence of the gap formation in both local moment and mixed valence regimes is captured within the dynamical mean field (DMFT) approximation to the periodic Anderson model (PAM)...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28931362/dual-antiplatelet-therapy-is-associated-with-coagulopathy-detectable-by-thrombelastography-in-acute-stroke
#18
Mark M McDonald, Tareq S Almaghrabi, Daniel M Saenz, Chunyan Cai, Mohammad H Rahbar, H Alex Choi, Kiwon Lee, James C Grotta, Tiffany R Chang
BACKGROUND: Thrombelastography (TEG) provides a global, dynamic measure of coagulation. We examined the effect of antiplatelet (AP) medications on coagulation in patients with acute stroke as measured by TEG. METHODS: We reviewed prospectively collected data on patients presenting with acute ischemic stroke (AIS) and spontaneous intracerebral hemorrhage (ICH) between 2009 and 2014. Patient demographics and baseline TEG values were compared among 4 different drug use groups: aspirin only, clopidogrel only, both aspirin and clopidogrel, and no AP...
January 1, 2017: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/28931032/a-microtubule-based-minimal-model-for-spontaneous-and-persistent-spherical-cell-polarity
#19
Panayiotis Foteinopoulos, Bela M Mulder
We propose a minimal model for the spontaneous and persistent generation of polarity in a spherical cell based on dynamic microtubules and a single mobile molecular component. This component, dubbed the polarity factor, binds to microtubules nucleated from a centrosome located in the center of the cell, is subsequently delivered to the cell membrane, where it diffuses until it unbinds. The only feedback mechanism we impose is that the residence time of the microtubules at the membrane increases with the local density of the polarity factor...
2017: PloS One
https://www.readbyqxmd.com/read/28930460/imaging-the-photodissociation-dynamics-of-nitrous-acid-hono-the-role-of-torsion
#20
Chandika Amarasinghe, Alexander Kamasah, Casey D Foley, James O F Thompson, Arthur G Suits
We present the findings of the first imaging study of trans-HONO and cis-HONO photodissociation through the band and of the 1A" -1A' transition. The NO photofragment was probed by (1+1) Resonance Enhanced Multiphoton Ionization (REMPI) and studied using the DC slice imaging technique with our Finite Slice reconstruction method (FinA). The NO state-specific translational energy distributions show some rotational structure corresponding to the internal state distribution in the OH co-fragment. All images showed a perpendicular angular distribution with a recoil anisotropy parameter around -0...
September 20, 2017: Journal of Physical Chemistry. A
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