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https://www.readbyqxmd.com/read/28330019/facial-nerve-tractography-a-new-tool-to-detect-perineural-invasion-in-parotid-cancers
#1
René-Charles Rouchy, Arnaud Attyé, Irène Troprès, Maud Medici, Adrian Kastler, Christian Righini, Alexandre Krainik
PURPOSE: To determine whether magnetic resonance (MR) tractography of facial nerve (VIIn) is useful to detect perineural invasion in case of parotid cancers. MATERIALS AND METHODS: Thirty patients, aged 18 or over, were enrolled in this prospective study between December 2013 and March 2016 (IRB 5891), with a diagnosis of parotid tumors (15 malignant, 15 benign). They have undergone preoperative MR scans (3.0-T) before surgical management. The parameters of the diffusion-weighted (DW) sequence were b-value of 1000s/mm(2); 32 directions; voxel size: 2mm isotropic; scan time: 9' The post-processing generates whole-neck constrained spherical deconvolution (CSD)-based tractography data and super-resolution track-weighted imaging (TWI) technique...
March 2017: Journal of Neuroradiology. Journal de Neuroradiologie
https://www.readbyqxmd.com/read/28329864/age-differences-in-cognitive-and-affective-theory-of-mind-concurrent-contributions-of-neurocognitive-performance-sex-and-pulse-pressure
#2
Ashley L Fischer, Norm O'Rourke, Wendy Loken Thornton
Objectives: Theory of mind (ToM) allows us to detect and make inferences about cognitive and affective mental states. Mixed findings exist regarding (a) age differences in cognitive and affective ToM and (b) what mechanisms may underlie changes in the two components. We addressed these questions by examining the unique and joint contributions of neurocognitive performance, pulse pressure (PP), and biological sex to age differences in cognitive and affective ToM. Method: We tested 86 young and 85 older adults on standardized measures of neurocognitive performance and ToM...
August 7, 2016: Journals of Gerontology. Series B, Psychological Sciences and Social Sciences
https://www.readbyqxmd.com/read/28329808/lifecourse-activity-participation-from-early-mid-and-later-adulthood-as-determinants-of-cognitive-aging-the-lothian-birth-cohort-1921
#3
Alan J Gow, Alison Pattie, Ian J Deary
Objectives: To examine potential sensitive periods for activity participation across adulthood to reduce cognitive decline and to determine whether associations persist after accounting for the lifetime stability of cognitive ability. Method: The Lothian Birth Cohort 1921 is a longitudinal study of cognitive aging. Participants were born in 1921 and most completed a mental ability test at the age of 11 years. Cognitive assessments were completed at mean ages 79 (N = 550), 83 (N = 321), 87 (N = 235), and 90 years (N = 129)...
October 7, 2016: Journals of Gerontology. Series B, Psychological Sciences and Social Sciences
https://www.readbyqxmd.com/read/28329420/towards-a-symptom-cluster-model-in-chronic-kidney-disease-a-structural-equation-approach
#4
Hayfa Almutary, Clint Douglas, Ann Bonner
AIMS: To test a symptom cluster model in chronic kidney disease patients based on the Theory of Unpleasant Symptoms, accounting for the relationships between influencing factors, symptom experience and consequences for quality of life. BACKGROUND: The evaluation of symptom clusters is a new field of scientific inquiry directed toward more focused symptom management. Yet, little is known about relationships between symptom clusters, predictors and the synergistic effect of multiple symptoms on outcomes...
March 22, 2017: Journal of Advanced Nursing
https://www.readbyqxmd.com/read/28328925/a-source-controlled-data-center-network-model
#5
Yang Yu, Mangui Liang, Zhe Wang
The construction of data center network by applying SDN technology has become a hot research topic. The SDN architecture has innovatively separated the control plane from the data plane which makes the network more software-oriented and agile. Moreover, it provides virtual multi-tenancy, effective scheduling resources and centralized control strategies to meet the demand for cloud computing data center. However, the explosion of network information is facing severe challenges for SDN controller. The flow storage and lookup mechanisms based on TCAM device have led to the restriction of scalability, high cost and energy consumption...
2017: PloS One
https://www.readbyqxmd.com/read/28328625/indicators-of-quality-of-care-in-inflammatory-bowel-disease-seeking-the-right-path-for-patients
#6
Wael El-Matary
No abstract text is available yet for this article.
March 21, 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28328554/the-effect-of-inlet-cannula-length-on-the-intraventricular-flow-field-an-in-vitro-flow-visualization-study-using-the-evaheart-lvad
#7
Karen May-Newman, Juyeun Moon, Varsha Ramesh, Ricardo Montes, Josue Campos, Brian Herold, Paul Isingoma, Tadashi Motomura, Robert Benkowski
LVAD inflow cannula malposition is a significant risk for pump thrombosis. Thrombus development is influenced by altered flow dynamics, such as stasis or high shear that promote coagulation. The goal of this study was to measure the intraventricular flow field surrounding the apical inflow cannula of the Evaheart centrifugal LVAD, and assess flow stasis, vortex structures and pulsatility for a range of cannula insertion depths and support conditions. Experimental studies were performed using a mock loop with a customized silicone left ventricle (LV) and the Evaheart LVAD...
March 20, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28328510/investigation-and-modeling-of-capacitive-human-body-communication
#8
Xiao-Qi Zhu, Yong-Xin Guo, Wen Wu
This paper presents a systematic investigation of the capacitive human body communication (HBC). The measurement of HBC channels is performed using a novel battery-powered system to eliminate the effects of baluns, cables and instruments. To verify the measured results, a numerical model incorporating the entire HBC system is established. Besides, it is demonstrated that both the impedance and path gain bandwidths of HBC channels is affected by the electrode configuration. Based on the analysis of the simulated electric field distribution, an equivalent circuit model is proposed and the circuit parameters are extracted using the finite element method...
March 16, 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28328039/reduction-of-metal-adducts-in-oligonucleotide-mass-spectra-in-ion-pair-reversed-phase-chromatography-mass-spectrometry-analysis
#9
Robert E Birdsall, Martin Gilar, Henry Shion, Ying Qing Yu, Weibin Chen
RATIONALE: Electrospray ionization mass spectrometry (ESI-MS)-based techniques commonly used in oligonucleotide analyses are known to be sensitive to alkali metal adduct formation. Adducts directly impact the sensitivity of MS-based analyses as the available charge is distributed across the parent peak and adduct(s). The current study systematically evaluated common liquid chromatography (LC) components in LC/ESI-MS configurations used in oligonucleotide analysis to identify metal adduct contributions from LC instrumentation...
July 30, 2016: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28327874/left-atrial-deformation-analysis-in-patients-with-corrected-tetralogy-of-fallot-by-3d-speckle-tracking-echocardiography-from-the-magyar-path-study
#10
Kálmán Havasi, Péter Domsik, Anita Kalapos, Jackie S McGhie, Jolien W Roos-Hesselink, Tamás Forster, Attila Nemes
Background: Three-dimensional (3D) echocardiography coupled with speckle-tracking echocardiographic (STE) capability is a novel methodology which has been demontrated to be useful for the assessment of left atrial (LA) volumes and functional properties. There is increased scientific interest on myocardial deformation analysis in adult patients with corrected tetralogy of Fallot (cTOF). Objectives: To compare LA volumes, volume-based functional properties and strain parameters between cTOF patients and age- and gender-matched healthy controls...
February 2017: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/28327803/serodiagnosis-of-visceral-and-cutaneous-leishmaniasis-in-human-and-canine-populations-living-in-indigenous-reserves-in-the-brazilian-amazon-region
#11
Julia Teresa Ribeiro de Lima, Solange Maria Gennari, Herbert Sousa Soares, Antonio Humberto Hamad Minervino, Antonio Francisco Malheiros, Fernando Silveira Marques, Márcia Dalastra Laurenti, Rosangela Zacarias Machado, Arlei Marcili, Marcelo Bahia Labruna, Rodrigo Martins Soares
INTRODUCTION: Leishmaniasis is endemic to the Northern, Northeastern, Central-Western, and Southeastern regions of Brazil. We aimed to assess the epidemiological situation of leishmaniasis in humans and dogs in indigenous villages located in the States of Mato Grosso and Tocantins using a serological survey conducted in May 2011. METHODS: Serum samples were collected from 470 humans and 327 dogs living in villages of the Urubu Branco and Tapirapé Karajá indigenous reserves...
January 2017: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/28327718/can-charged-colloidal-particles-increase-the-thermoelectric-energy-conversion-efficiency
#12
Thomas J Salez, Bo Tao Huang, Maud Rietjens, Marco Bonetti, Cécile Wiertel-Gasquet, Michel Roger, Cleber Lopes Filomeno, Emmanuelle Dubois, Régine Perzynski, Sawako Nakamae
Currently, liquid thermocells are receiving increasing attention as an inexpensive alternative to conventional solid-state thermoelectrics for low-grade waste heat recovery applications. Here we present a novel path to increase the Seebeck coefficient of liquid thermoelectric materials using charged colloidal suspensions; namely, ionically stabilized magnetic nanoparticles (ferrofluids) dispersed in aqueous potassium ferro-/ferri-cyanide electrolytes. The dependency of thermoelectric potential on experimental parameters such as nanoparticle concentration and types of solute ions (lithium citrate and tetrabutylammonium citrate) is examined to reveal the relative contributions from the thermogalvanic potential of redox couples and the entropy of transfer of nanoparticles and ions...
March 22, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28327654/constructive-quantum-interference-in-a-bis-copper-six-porphyrin-nanoring
#13
Sabine Richert, Jonathan Cremers, Ilya Kuprov, Martin D Peeks, Harry L Anderson, Christiane R Timmel
The exchange interaction, J, between two spin centres is a convenient measure of through bond electronic communication. Here, we investigate quantum interference phenomena in a bis-copper six-porphyrin nanoring by electron paramagnetic resonance spectroscopy via measurement of the exchange coupling between the copper centres. Using an analytical expression accounting for both dipolar and exchange coupling to simulate the time traces obtained in a double electron electron resonance experiment, we demonstrate that J can be quantified to high precision even in the presence of significant through-space coupling...
March 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/28327273/factors-affecting-orthopedic-residency-selection-a-cross-sectional-survey
#14
Jason Strelzow, Robert Petretta, Henry M Broekhuyse
BACKGROUND: Annually, orthopedic residency programs rank and recruit the best possible candidates. Little evidence exists identifying factors that potential candidates use to select their career paths. Recent literature from nonsurgical programs suggests hospital, social and program-based factors influence program selection. We sought to determine what factors influence the choice of an orthopedic career and a candidate's choice of orthopedic residency program. METHODS: We surveyed medical student applicants to orthopedic programs and current Canadian orthopedic surgery residents (postgraduate year [PGY] 1-5)...
April 1, 2017: Canadian Journal of Surgery. Journal Canadien de Chirurgie
https://www.readbyqxmd.com/read/28327141/the-first-nationwide-survey-of-md-phds-in-the-social-sciences-and-humanities-training-patterns-and-career-choices
#15
Seth M Holmes, Jennifer Karlin, Scott D Stonington, Diane L Gottheil
BACKGROUND: While several articles on MD-PhD trainees in the basic sciences have been published in the past several years, very little research exists on physician-investigators in the social sciences and humanities. However, the numbers of MD-PhDs training in these fields and the number of programs offering training in these fields are increasing, particularly within the US. In addition, accountability for the public funding for MD-PhD programs requires knowledge about this growing population of trainees and their career trajectories...
March 21, 2017: BMC Medical Education
https://www.readbyqxmd.com/read/28326860/latvian-family-physicians-experience-diagnosing-depression-in-somatically-presenting-depression-patients-a-qualitative-study
#16
Maija S Leff, Jeļena Vrubļevska, Agita Lūse, Elmārs Rancāns
BACKGROUND: Depression continues to be under-diagnosed in primary care settings. One factor that influences physicians' likelihood of diagnosing depression is patients' presentation style. Patients who initially present with somatic symptoms are diagnosed at a lower rate and with greater delay than patients who present with psychosocial complaints. OBJECTIVES: To identify the barriers preventing depression diagnosis in somatically presenting patients in an Eastern European primary care setting...
December 2017: European Journal of General Practice
https://www.readbyqxmd.com/read/28326598/compassion-based-meditation-in-african-americans-self-criticism-mediates-changes-in-depression
#17
Suzanne B Johnson, Bradley L Goodnight, Huaiyu Zhang, Irene Daboin, Bobbi Patterson, Nadine J Kaslow
This study examines self-criticism as a mechanism through which compassion meditation reduces depressive symptoms in low-income African American men and women (N = 59) who had recently attempted suicide. After completing several measures, including the Levels of Self-Criticism Scale and Beck Depression Inventory-II, participants were randomly assigned to receive either a six-session compassion meditation (CM) group (Grady Compassion and Meditation Program) or a six-session support group. As predicted, path analysis results showed that treatment condition led to changes in self-criticism from pre- to posttreatment, with those receiving CM showing greater reductions in levels of self-criticism than those randomized to the support group...
March 21, 2017: Suicide & Life-threatening Behavior
https://www.readbyqxmd.com/read/28326540/a-life-history-approach-to-delineating-how-harsh-environments-and-hawk-temperament-traits-differentially-shape-children-s-problem-solving-skills
#18
Jennifer H Suor, Melissa L Sturge-Apple, Patrick T Davies, Dante Cicchetti
BACKGROUND: Harsh environments are known to predict deficits in children's cognitive abilities. Life history theory approaches challenge this interpretation, proposing stressed children's cognition becomes specialized to solve problems in fitness-enhancing ways. The goal of this study was to examine associations between early environmental harshness and children's problem-solving outcomes across tasks varying in ecological relevance. In addition, we utilize an evolutionary model of temperament toward further specifying whether hawk temperament traits moderate these associations...
March 22, 2017: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/28326021/abnormalities-in-structural-covariance-of-cortical-gyrification-in-parkinson-s-disease
#19
Jinping Xu, Jiuquan Zhang, Jinlei Zhang, Yue Wang, Yanling Zhang, Jian Wang, Guanglin Li, Qingmao Hu, Yuanchao Zhang
Although abnormal cortical morphology and connectivity between brain regions (structural covariance) have been reported in Parkinson's disease (PD), the topological organizations of large-scale structural brain networks are still poorly understood. In this study, we investigated large-scale structural brain networks in a sample of 37 PD patients and 34 healthy controls (HC) by assessing the structural covariance of cortical gyrification with local gyrification index (lGI). We demonstrated prominent small-world properties of the structural brain networks for both groups...
2017: Frontiers in Neuroanatomy
https://www.readbyqxmd.com/read/28325603/a-path-based-approach-to-assessing-molecular-complexity
#20
John R Proudfoot
An atom environment, path based approach to calculating molecular complexity is described. Based on Shannon's equation, the method transforms the number and diversity of paths emanating from an atom to an atom-complexity from which a number of molecular complexity measures are derived. The method is independent of explicitly predefined features such as ring membership, bond types, chirality or symmetry. These path-based measures of complexity can distinguish subtle differences in molecular structure and an application to the visualization of marketed drugs, including a number of biologics, is presented...
March 9, 2017: Bioorganic & Medicinal Chemistry Letters
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