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https://www.readbyqxmd.com/read/29166052/a-jeziorski-monkhorst-fully-uncontracted-multi-reference-perturbative-treatment-i-principles-second-order-versions-and-tests-on-ground-state-potential-energy-curves
#1
Emmanuel Giner, Celestino Angeli, Yann Garniron, Anthony Scemama, Jean-Paul Malrieu
The present paper introduces a new multi-reference perturbation approach developed at second order, based on a Jeziorski-Mokhorst expansion using individual Slater determinants as perturbers. Thanks to this choice of perturbers, an effective Hamiltonian may be built, allowing for the dressing of the Hamiltonian matrix within the reference space, assumed here to be a CAS-CI. Such a formulation accounts then for the coupling between the static and dynamic correlation effects. With our new definition of zeroth-order energies, these two approaches are strictly size-extensive provided that local orbitals are used, as numerically illustrated here and formally demonstrated in the Appendix...
June 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29164659/spatializing-emotion-no-evidence-for-a-domain-general-magnitude-system
#2
Benjamin Pitt, Daniel Casasanto
People implicitly associate different emotions with different locations in left-right space. Which aspects of emotion do they spatialize, and why? Across many studies people spatialize emotional valence, mapping positive emotions onto their dominant side of space and negative emotions onto their non-dominant side, consistent with theories of metaphorical mental representation. Yet other results suggest a conflicting mapping of emotional intensity (a.k.a., emotional magnitude), according to which people associate more intense emotions with the right and less intense emotions with the left - regardless of their valence; this pattern has been interpreted as support for a domain-general system for representing magnitudes...
November 22, 2017: Cognitive Science
https://www.readbyqxmd.com/read/29164301/changes-in-multimodality-functional-imaging-parameters-early-during-chemoradiation-predict-treatment-response-in-patients-with-locally-advanced-head-and-neck-cancer
#3
Kee H Wong, Rafal Panek, Alex Dunlop, Dualta Mcquaid, Angela Riddell, Liam C Welsh, Iain Murray, Dow-Mu Koh, Martin O Leach, Shreerang A Bhide, Christopher M Nutting, Wim J Oyen, Kevin J Harrington, Kate L Newbold
OBJECTIVE: To assess the optimal timing and predictive value of early intra-treatment changes in multimodality functional and molecular imaging (FMI) parameters as biomarkers for clinical remission in patients receiving chemoradiation for head and neck squamous cell carcinoma (HNSCC). METHODS: Thirty-five patients with stage III-IVb (AJCC 7th edition) HNSCC prospectively underwent (18)F-FDG-PET/CT, and diffusion-weighted (DW), dynamic contrast-enhanced (DCE) and susceptibility-weighted MRI at baseline, week 1 and week 2 of chemoradiation...
November 21, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29163345/fluid-distribution-pattern-in-adult-onset-congenital-idiopathic-and-secondary-normal-pressure-hydrocephalus-implications-for-clinical-care
#4
Shigeki Yamada, Masatsune Ishikawa, Kazuo Yamamoto
Objective: In spite of growing evidence of idiopathic normal-pressure hydrocephalus (NPH), a viewpoint about clinical care for idiopathic NPH is still controversial. A continuous divergence of viewpoints might be due to confusing classifications of idiopathic and adult-onset congenital NPH. To elucidate the classification of NPH, we propose that adult-onset congenital NPH should be explicitly distinguished from idiopathic and secondary NPH. Methods: On the basis of conventional CT scan or MRI, idiopathic NPH was defined as narrow sulci at the high convexity in concurrent with enlargement of the ventricles, basal cistern and Sylvian fissure, whereas adult-onset congenital NPH was defined as huge ventricles without high-convexity tightness...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29162638/the-relationship-between-pectoral-fin-ray-stiffness-and-swimming-behavior-in-labridae-insights-into-design-performance-and-ecology
#5
Brett R Aiello, Adam R Hardy, Chery Cherian, Aaron M Olsen, Sihyun E Ahn, Melina E Hale, Mark W Westneat
The functional capabilities of flexible, propulsive, appendages are directly influenced by their mechanical properties. The fins of fishes have undergone extraordinary evolutionary diversification in structure and function, which raises questions of how fin mechanics relate to swimming behavior. In the fish family Labridae, pectoral fin swimming behavior ranges from rowing to flapping. Rowers are more maneuverable than flappers, but flappers generate greater thrust at high speeds and achieve greater mechanical efficiency at all speeds...
November 21, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29162248/predicting-syndesmotic-injuries-in-ankle-fractures-a-new-system-based-on-the-medial-malleolar-focus
#6
Enrique Sánchez-Morata, José Carlos Martínez-Ávila, Elena Vacas Sánchez, Verónica Jiménez Díaz, Jaime Zorrilla Sánchez de Neyra, Jesús Vilá Y Rico
The early establishment of the diagnosis of a syndesmotic injury is essential for treatment selection. However, such injuries may not be apparent radiographically. Previous studies have attempted to describe correlations between medial malleolar fracture geometry and syndesmotic disruption. The main objective of this study was to create predictive models for assessing syndesmotic injuries based on an originally described angle, i.e., the medial crural-focal angle (MCFA). This study included 138 ankle fractures involving the medial malleolus...
November 2017: Injury
https://www.readbyqxmd.com/read/29162074/the-role-of-cage-height-on-the-flexibility-and-load-sharing-of-lumbar-spine-after-lumbar-interbody-fusion-with-unilateral-and-bilateral-instrumentation-a-biomechanical-study
#7
Lin Du, Xiao-Jiang Sun, Tang-Jun Zhou, Yuan-Chao Li, Chen Chen, Chang-Qing Zhao, Kai Zhang, Jie Zhao
BACKGROUND: One- and two-level lumbar interbody fusion with unilateral instrumentation is as effective as that with bilateral instrumentation. The height of the interbody cage influences the operated segment stability and the fusion technique success. The purpose of this research was to determine the effect of the fusion cage height (i.e. long and short) on both the stability (based on flexibility measures) and load sharing of the unilateral and bilateral instrumented transforaminal lumbar interbody fusion (TLIF) technique...
November 21, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29159352/improved-li-storage-performance-with-pedot-decorated-mno2-nanoboxes
#8
Xiaoqiao Chen, Zhiguang Cao, Lidan Xing, Youhao Liao, Yongcai Qiu, Weishan Li
In this paper, MnO2 nanoboxes coated with poly(3,4-ethylenedioxythiophene) film (denoted as MnO2@PEDOT) are investigated as an anode material in lithium-ion batteries. The MnO2 nanoboxes are developed through the surface chemical oxidation decomposition of MnCO3 cubes and the subsequent removal of their remaining cores. PEDOT is coated on the surface of MnO2 nanoboxes via in situ polymerization of 3,4-ethylenedioxythiophene. The charge-discharge tests demonstrate that this special configuration endows the resulting MnO2@PEDOT with remarkable electrochemical performances, that is a reversible capacity of 628 mA h g(-1) after 850 cycles at a current density of 1000 mA g(-1) and a rate capacity of 367 mA h g(-1) at 3000 mA g(-1)...
November 21, 2017: Nanoscale
https://www.readbyqxmd.com/read/29157032/pain-fatigue-function-and-participation-among-long-term-manual-wheelchair-users-partnered-with-a-mobility-service-dog
#9
Claude Vincent, Dany H Gagnon, Frédéric Dumont
PURPOSE: To assess the effects of a mobility service dog (MSD) on pain, fatigue, wheelchair-related functional tasks, participation and satisfaction among manual wheelchair users over a nine-month period. METHOD: A longitudinal study with repeated assessment times before and three, six and nine months after intervention was achieved. Intervention consisted in partnering each participant with a MSD. The setting is a well-established provincial service dog training school and participants homes...
November 20, 2017: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/29156494/comparative-analysis-of-vestibular-ecomorphology-in-birds
#10
Roger B J Benson, Ethan Starmer-Jones, Roger A Close, Stig A Walsh
The bony labyrinth of vertebrates houses the semicircular canals. These sense rotational accelerations of the head and play an essential role in gaze stabilisation during locomotion. The sizes and shapes of the semicircular canals have hypothesised relationships to agility and locomotory modes in many groups, including birds, and a burgeoning palaeontological literature seeks to make ecological interpretations from the morphology of the labyrinth in extinct species. Rigorous tests of form-function relationships for the vestibular system are required to support these interpretations...
December 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/29156492/bayesian-monotonic-errors-in-variables-models-with-applications-to-pathogen-susceptibility-testing
#11
Glen DePalma, Bruce A Craig
Drug dilution (MIC) and disk diffusion (DIA) are the 2 most common antimicrobial susceptibility assays used by hospitals and clinics to determine an unknown pathogen's susceptibility to various antibiotics. Since only one assay is commonly used, it is important that the 2 assays give similar results. Calibration of the DIA assay to the MIC assay is typically done using the error-rate bounded method, which selects DIA breakpoints that minimize the observed discrepancies between the 2 assays. In 2000, Craig proposed a model-based approach that specifically models the measurement error and rounding processes of each assay, the underlying pathogen distribution, and the true monotonic relationship between the 2 assays...
November 20, 2017: Statistics in Medicine
https://www.readbyqxmd.com/read/29156149/quantitative-evaluation-of-vertebral-microvascular-permeability-and-fat-fraction-in-alloxan-induced-diabetic-rabbits
#12
Lei Hu, Yun Fei Zha, Li Wang, Liang Li, Dong Xing, Wei Gong, Jiao Wang, Yuan Lin, Fei Fei Zeng, Xue Song Lu
Purpose To determine longitudinal relationships between lumbar vertebral bone marrow permeability and marrow adipose tissue in a rabbit diabetes model by using quantitative dynamic contrast agent-enhanced (DCE) magnetic resonance (MR) imaging and iterative decomposition of water and fat with the echo asymmetry and least-squares estimation quantitation (IDEAL IQ) sequence. Materials and Methods Twenty rabbits were randomly assigned to the diabetic (n = 10) or control (n = 10) group. All rabbits underwent sagittal MR imaging of the lumbar region at fixed time points (0, 4, 8, 12, and 16 weeks after alloxan injection)...
November 20, 2017: Radiology
https://www.readbyqxmd.com/read/29156083/toward-ecologically-realistic-predictions-of-species-distributions-a-cross-time-example-from-tropical-montane-cloud-forests
#13
Lázaro Guevara, Beth E Gerstner, Jamie M Kass, Robert P Anderson
There is an urgent need for more ecologically realistic models for better predicting the effects of climate change on species' potential geographic distributions. Here we build ecological niche models using MAXENT and test whether selecting predictor variables based on biological knowledge and selecting ecologically realistic response curves can improve cross-time distributional predictions. We also evaluate how the method chosen for extrapolation into nonanalog conditions affects the prediction. We do so by estimating the potential distribution of a montane shrew (Mammalia, Soricidae, Cryptotis mexicanus) at present and the Last Glacial Maximum (LGM)...
November 20, 2017: Global Change Biology
https://www.readbyqxmd.com/read/29154999/kinematic-analysis-of-the-space-available-for-cord-and-disc-bulging-of-the-thoracic-spine-using-kinematic-magnetic-resonance-imaging-kmri
#14
Permsak Paholpak, Ishan Shah, Lou-Anne Acevedo-Moreno, Koji Tamai, Jeffrey C Wang, Zorica Buser
BACKGROUND CONTEXT: The thoracic spine was previously known as a relatively stable region in human spine. Several studies reported motion of the thoracic spine and changes in the cross-sectional area of the spinal cord changed with positions in sagittal plane. The kinematic relationship between the thoracic disc and space available for cord with the positional change is still not well investigated. PURPOSE: To evaluate the kinematic change of the intervertebral disc and space available for the spinal cord of the thoracic spine using kMRI...
November 14, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29154629/emergent-perception-of-gaze-direction-across-time
#15
Diana Mihalache, Laurel A Gaeddert, Timothy D Sweeny
To determine where another person is looking, the visual system engages a process of emergent integration, pooling information across space from both the head and eyes. Gaze is dynamic, however, and in order to achieve a temporally stabilized metric of a person's direction of attention, this integrative process might also occur across time. Here, we tested and confirmed this prediction. Even when seen separately and in succession, the rotation of a head attracted the perceived gaze of a pair of eyes. This integration depended on temporal continuity-attraction decayed with longer delays between the face parts and prolonged viewing of the head reduced integration...
November 20, 2017: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/29153914/determination-of-orientin-in-trollius-chinensis-using-ultrasound-assisted-extraction-and-high-performance-liquid-chromatography-several-often-overlooked-sample-preparation-parameters-in-an-ultrasonic-bath
#16
Mengxia Wei, Lei Yang
The erratic pressure intensities and cavitation exhibited in an ultrasonic bath pose various during practical application. To achieve the most efficient experimental design, this manuscript aims to discover violently sites that are subject to the effect of slight changes in position on cavitation and ultrasound intensity distributed in the ultrasonic bath. In addition, optimization several often over-looked ultrasound parameters and experimental conditions, are intended to place the reaction vessel properly and operate under suitable experimental conditions to obtain the maximum yield of target analyte...
November 15, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29153746/degree-of-conversion-of-resin-cement-with-varying-methacrylate-compositions-used-to-cement-fiber-dowels-a-raman-spectroscopy-study
#17
Abdulelah M BinMahfooz, Osama A Qutub, Thamer Y Marghalani, Mohammed F Ayad, Abdulhamaid A Maghrabi
STATEMENT OF PROBLEM: Studies on the degree of conversion of dental cement in relation to the number of methacrylate components are lacking. PURPOSE: The purpose of this in vitro study was to evaluate the degree of conversion of single- and multicomponent methacrylate-containing dental cements around opaque and translucent fiber dowels at varying depths. MATERIAL AND METHODS: Teeth were prepared for standard endodontic therapy, and a dowel space was created...
November 15, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29153369/retrospective-comparison-of-three-dimensional-imaging-sequences-in-the-visualization-of-posterior-fossa-cranial-nerves
#18
Suna Ors, Ercan Inci, Rustu Turkay, Atilla Kokurcan, Elif Hocaoglu
PURPOSE: To compare efficancy of three-dimentional SPACE (sampling perfection with application-optimized contrasts using different flip-angle evolutions) and CISS (constructive interference in steady state) sequences in the imaging of the cisternal segments of cranial nerves V-XII. METHODS: Temporal MRI scans from 50 patients (F:M ratio, 27:23; mean age, 44.5±15.9 years) admitted to our hospital with vertigo, tinnitus, and hearing loss were retrospectively analyzed...
December 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/29151620/in-silico-synthesis-of-microgel-particles
#19
Nicoletta Gnan, Lorenzo Rovigatti, Maxime Bergman, Emanuela Zaccarelli
Microgels are colloidal-scale particles individually made of cross-linked polymer networks that can swell and deswell in response to external stimuli, such as changes to temperature or pH. Despite a large amount of experimental activities on microgels, a proper theoretical description based on individual particle properties is still missing due to the complexity of the particles. To go one step further, here we propose a novel methodology to assemble realistic microgel particles in silico. We exploit the self-assembly of a binary mixture composed of tetravalent (cross-linkers) and bivalent (monomer beads) patchy particles under spherical confinement in order to produce fully bonded networks...
November 14, 2017: Macromolecules
https://www.readbyqxmd.com/read/29150027/tailored-resections-in-oral-and-oropharyngeal-cancer-using-narrow-band-imaging
#20
Giancarlo Tirelli, Marco Piovesana, Alberto Vito Marcuzzo, Annalisa Gatto, Matteo Biasotto, Rossana Bussani, Lorenzo Zandonà, Fabiola Giudici, Francesca Boscolo Nata
PURPOSE: In a previous pilot study we observed that intra-operative narrow-band imaging (NBI) helps achieve clear superficial resection margins. The aim of this study was to verify if the use of intra-operative NBI can help to obtain tailored resections and if it is influenced by the lesion site, aspects not investigated in our previous study. MATERIALS AND METHODS: The resection margins of 39 oral and 22 oropharyngeal squamous cell carcinomas were first set at 1...
November 10, 2017: American Journal of Otolaryngology
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