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https://www.readbyqxmd.com/read/28437968/vortex-energy-flows-generated-by-core-shell-nanospheres
#1
Shih-Wen Chen, Jia-Han Li
Investigated in this paper is the interaction of light and the nanospheres composed by a dielectric core with a gold-shell cladding that causes the optical vortices inside the core and the whirlpools around the shell. Different radius ratios, dimensions and the dielectric functions of nanospheres were studied using the finite-difference time-domain method. It was found that optical vortices were most likely to occur in the regions of increased absorption cross section and reduced scattering cross section. Two optical vortices of the opposite polarity, each centered in one of the particles of a dimer are created by a nanoshell dimer...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437917/vector-radiative-transfer-model-for-coupled-atmosphere-and-ocean-systems-including-inelastic-sources-in-ocean-waters
#2
Peng-Wang Zhai, Yongxiang Hu, David M Winker, Bryan A Franz, Jeremy Werdell, Emmanuel Boss
Inelastic scattering plays an important role in ocean optics. The main inelastic scattering mechanisms include Raman scattering, fluorescence by colored dissolved organic matter (FDOM), and fluorescence by chlorophyll. This paper reports an implementation of all three inelastic scattering mechanisms in the exact vector radiative transfer model for coupled atmosphere and ocean Systems (CAOS). Simulation shows that FDOM contributes to the water radiation field in the broad visible spectral region, while chlorophyll fluorescence is limited in a narrow band centered at 685 nm...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437894/effect-of-anisotropic-electron-momentum-distribution-of-surface-plasmon-on-internal-photoemission-of-a-schottky-hot-carrier-device
#3
Xin-Hao Li, Jeffrey B Chou, Wei Lek Kwan, Asma M Elsharif, Sang-Gook Kim
We recently reported that an Au/TiO<sub>2</sub> photonic crystal device for photochemical energy conversion showed a sub-bandgap photoresponse centered at the surface plasmon polariton (SPP) resonant wavelength of this device. Here we developed a theoretical modeling of the internal photoemission in this device by incorporating the effects of anisotropic hot electron momentum distribution caused by SPP. The influences of interband and intraband transition, anisotropic momentum distribution of hot electrons by SPP are integrated to model the internal quantum efficiency (IQE) of this device...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437868/early-mortality-and-overall-survival-of-acute-myeloid-leukemia-based-on-facility-type
#4
Vijaya R Bhatt, Valerie Shostrom, Smith Giri, Krishna Gundabolu, K M Monirul Islam, Frederick R Appelbaum, Lori J Maness
Cancer health disparities may exist based on the facility type. We aimed to determine the association between the academic status of centers and outcomes of patients with acute myeloid leukemia (AML). Using the National Cancer Data Base, we compared one-month mortality and longer-term overall survival (OS) of 60,738 patients with AML, who received first course treatment between 2003-2011 at academic or non-academic centers (community cancer program, comprehensive community cancer program, and others). Multivariate analysis was done using logistic regression for one-month mortality and Cox regression with backward elimination approach for OS...
April 24, 2017: American Journal of Hematology
https://www.readbyqxmd.com/read/28437855/mild-fetal-cerebral-ventriculomegaly-prevalence-characteristics-and-utility-of-ancillary-testing-in-cases-presenting-to-a-tertiary-referral-center
#5
Alison J Mehlhorn, Cara E Morin, Jade J Wong-You-Cheong, Stephen A Contag
OBJECTIVE: Ventriculomegaly is the most common fetal brain anomaly identified during prenatal anatomy ultrasound. The aim of our study was to characterize cases of mild ventriculomegaly and investigate the utility of ancillary tests. METHOD: We reviewed 121 cases of mild ventriculomegaly, defined as lateral ventricle diameter of 10-15 mm. Characteristics of the ventricular dilation as well as each pregnancy were investigated. Ancillary tests performed included follow-up MRI, chromosomal abnormality testing, and maternal serologic infection screening...
April 24, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28437825/-quality-of-life-and-functional-outcome-after-microsurgical-decompression-in-lumbar-spinal-stenosis-a-register-study
#6
Kourosh Zarghooni, Frank Beyer, Joanna Papadaki, Christoph Kolja Boese, Jan Siewe, Gereon Schiffer, Peer Eysel, Jan Bredow
Introduction Because of recent increases in life expectancy, lumbar spinal stenosis (LSS) has become one of the most common degenerative changes in the spine. In patients not responding to conservative therapy, microsurgical decompression is the gold standard of operative treatment for degenerative LSS. The goal of the current study is to evaluate quality of life after microsurgical decompression for LSS, using data from the DWG Register (previously Spine Tango). Methods 36 patients were included in this single-center, prospective, observational study from January 2013 to June 2014...
April 24, 2017: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/28437802/surveillance-after-resection-of-pancreatic-ductal-adenocarcinoma-with-curative-intent-a-multicenter-survey-in-germany-and-review-of-the-literature
#7
Thomas J Ettrich, Lucas A Schulte, Natalie Eitel, Kristin Ettrich, Andreas W Berger, Lukas Perkhofer, Thomas Seufferlein
Background Pancreatic ductal adenocarcinoma (PDAC) is one of the most lethal cancers with high risk of relapse even after curative-intended resection. There are no evidence-based recommendations for surveillance in actual guidelines. Given this situation and as a basis for prospective studies, we wanted to determine the current practice of surveillance after pancreatic cancer resection in German institutions. Methods A web-based questionnaire was sent in 2015 to 300 German institutions (hospitals, outpatient clinics, and private practices) experienced in the care of patients with PDAC...
April 24, 2017: Zeitschrift Für Gastroenterologie
https://www.readbyqxmd.com/read/28437765/suicidality-associated-with-ptsd-depression-and-disaster-recovery-status-among-adult-survivors-8-years-after-the-2008-wenchuan-earthquake-in-china
#8
Jing Guo, Huan He, Mingqi Fu, Ziqiang Han, Zhiyong Qu, Xiaohua Wang, Liding Guan
It has been eight years since the Wenchuan earthquake. We don't know how the lives of those affected by the disaster may remain blighted by its effects, or how many remain thus affected. The aim of the present study was to examine the relationship of disaster exposure, PTSD, depression and suicidal behaviors, using data from a cross-sectional survey conducted in earthquake-affected areas of China. 1369 participants were recruited from two different sites that were severely affected by the Wenchuan earthquake...
April 12, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28437749/epilepsy-awareness-and-emergency-rescue-training-ignorance-is-bliss
#9
Rohit Shankar, Caryn Jory, Brendan McLean, Phil Tittensor, Matthew Walker
Status epilepticus (SE) has a high mortality rate and is associated with complications such as neurological deficit and cognitive decline. Buccal midazolam is the recommended emergency rescue medication in the UK to reduce the duration of a seizure and SE. It should be administered by an appropriately trained person. There are agreed guidelines on training standards for its administration in the UK produced by the Joint Epilepsy Council of the United Kingdom and Ireland. Training should provide an overview of epilepsy to facilitate safe, person-centered care and appropriate administration of rescue medication to people with epilepsy (PWE)...
April 19, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28437739/experimental-study-on-evaluation-and-optimization-of-tilt-angle-of-parallel-plate-electrodes-using-electrocoagulation-device-for-oily-water-demulsification
#10
Yang Liu, Wen-Ming Jiang, Jie Yang, Yu-Xing Li, Ming-Can Chen, Jian-Na Li
Tilt angle of parallel-plate electrodes (APE) is very important as it improves the economy of diffusion controlled Electrocoagulation (EC) processes. This study aimed to evaluate and optimize APE of a self-made EC device including integrally rotary electrodes, at a fixed current density of 120 Am(-2). The APEs investigated in this study were selected at 0°, 30°, 45°, 60°, 90°, and a special value (α(d)) which was defined as a special orientation of electrode when the upper end of anode and the lower end of cathode is in a line vertical to the bottom of reactor...
April 12, 2017: Chemosphere
https://www.readbyqxmd.com/read/28437687/use-of-tourmaline-as-a-potential-petrogenetic-indicator-in-the-determination-of-host-magma-crs-xrd-and-ped-xrf-methods
#11
Bahattin Gullu, Yusuf Kagan Kadioglu
Tourmaline defines a group of complex borosilicate forms as accessory mineral in igneous and metamorphic rocks and they act an important role in the interpretation of the chemical composition changes of the composition of the host fluid of the magma. The variety of tourmaline can be identified by using optical microscopy, X-Ray Diffraction (XRD) and by determining its chemical composition through Polarized Energy Dispersive X-Ray Fluorescence (PED-XRF) methods. However, microscopic investigations and XRD analyses are not quite adequate for detailed determination of tourmaline sub-groups...
April 19, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28437676/superior-inferior-position-of-patellar-component-affects-patellofemoral-kinematics-and-contact-forces-in-computer-simulation
#12
Shinichiro Nakamura, Yoshihisa Tanaka, Shinichi Kuriyama, Kohei Nishitani, Hiromu Ito, Moritoshi Furu, Shuichi Matsuda
BACKGROUND: Anterior knee pain has been reported as a major postoperative complication after total knee arthroplasty, which may lead to patient dissatisfaction. Rotational alignment and the medial-lateral position correlate with patellar maltracking, which can cause knee pain postoperatively. However, the superior-inferior position of the patellar component has not been investigated. The purpose of the current study was to investigate the effects of the patellar superior-inferior position on patellofemoral kinematics and kinetics...
April 18, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28437637/analysis-of-free-moment-and-center-of-pressure-frequency-components-during-quiet-standing-using-magnitude-squared-coherence
#13
Dean C Hay, Mark P Wachowiak
To date, no postural studies have investigated the specific relationship between linear (anteroposterior (AP) and mediolateral (ML)) postural sway and the free moment (FM) over the range of biomechanically important frequencies. The goal of the current paper is to study the relationship between FM and the AP/ML movements during quiet standing with respect to individual frequencies. Mean squared coherence, which measures the degree of the relationship between two signals as a function of frequency, is employed to address this question...
April 21, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28437634/convolutional-neural-network-regression-for-short-axis-left-ventricle-segmentation-in-cardiac-cine-mr-sequences
#14
Li Kuo Tan, Yih Miin Liew, Einly Lim, Robert A McLaughlin
Automated left ventricular (LV) segmentation is crucial for efficient quantification of cardiac function and morphology to aid subsequent management of cardiac pathologies. In this paper, we parameterize the complete (all short axis slices and phases) LV segmentation task in terms of the radial distances between the LV centerpoint and the endo- and epicardial contours in polar space. We then utilize convolutional neural network regression to infer these parameters. Utilizing parameter regression, as opposed to conventional pixel classification, allows the network to inherently reflect domain-specific physical constraints...
April 12, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28437570/self-acupressure-for-older-adults-with-symptomatic-knee-osteoarthritis-a-randomized-controlled-trial
#15
Lydia W Li, Richard E Harris, Alex Tsodikov, Laura Struble, Susan L Murphy ScD
OBJECTIVES: This double-blind RCT aimed to test the efficacy of self-administered acupressure for pain and physical function improvement for older adults with knee osteoarthritis (KOA). METHODS: Community-living adults with symptomatic KOA (N=150; mean age=73) participated and were randomized to verum acupressure, sham acupressure, or usual care. Verum and sham, but not usual care, participants were taught to self-apply acupressure once daily, five days/week for eight weeks...
April 24, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/28437560/phylogeography-and-population-structure-analysis-reveals-diversity-by-mutations-in-lasiodiplodia-theobromae-with-distinct-sources-of-selection
#16
P H D Santos, B M Carvalho, K P Aguiar, F A S Aredes, T P S Poltronieri, J M S Vivas, V Mussi Dias, G A Bezerra, D B Pinho, M G Pereira, S F Silveira
Lasiodiplodia theobromae is a plant pathogen with a worldwide distribution, with low host specificity, causing stem cankers, dieback diseases, and fruit rot in several species of plants. In coconut, this pathogen is reported as the etiological agent of "coconut leaf blight" (CLB) disease, causing several losses in fruit production. The CLB is an important disease for this crop in Brazil. In our study, we used a phylogeographic approach through the molecular characterization of the translation elongation factor 1-α (TEF1-α) to elucidate the pathogen distribution in Brazil and other countries, besides, search information about diversity sources of this pathogen in coconut palm tree at Brazilian northern, northeast, and southeast...
April 20, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28437558/genetic-diversity-of-bromeliaceae-species-from-the-atlantic-forest
#17
Y Sheu, A S Cunha-Machado, A B P L Gontijo, F C Favoreto, T B C Soares, F D Miranda
The Bromeliaceae family includes a range of species used for many purposes, including ornamental use and use as food, medicine, feed, and fiber. The state of Espírito Santo, Brazil is a center of diversity for this family in the Atlantic Forest. We evaluated the genetic diversity of five populations of the Bromeliaceae family, including specimens of the genera Aechmea, Billbergia (subfamily Bromelioideae), and Pitcairnia (subfamily Pitcairnioidea), all found in the Atlantic Forest and distributed in the state of Espírito Santo...
April 20, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28437552/bcr-abl1-transcript-types-showed-distinct-laboratory-characteristics-in-patients-with-chronic-myeloid-leukemia
#18
A P Vasconcelos, I F Azevedo, F C B C Melo, W B Neves, A C A C Azevedo, R A M Melo
In chronic myeloid leukemia (CML) two main types of messenger RNA (e14a2 and e13a2) can be produced by BCR-ABL1 gene rearrangement. Due to conflicting results, the clinical value of these transcripts remains controversial. The aim of this study was to identify associations of e14a2 and e13a2 transcripts with laboratory variables and also the response to treatment. This study included 203 adult patients with CML treated with Imatinib as first-line drug in a reference hematology center in Northeast Brazil. Clinical and laboratory data were obtained after informed consent...
April 20, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28437547/concordance-of-patient-and-physician-perceptions-of-care-in-an-orthopedic-clinic
#19
Kelly Zhang, Charles Day, Matthew L Iorio
It is essential to study whether physicians' perceptions align with their patients' views, as understanding patient perception leads to superior satisfaction and health outcomes. Previous studies have established differences in physician-patient perceptions, but no studies have been conducted in orthopedic clinics. The authors' primary goal was to evaluate differences in physician and patient perceptions of an orthopedic clinic visit. Their secondary objective was to determine the influence of visit length, demographics, and depression risk-level on patient satisfaction...
April 24, 2017: Orthopedics
https://www.readbyqxmd.com/read/28437539/safety-and-efficacy-of-antiviral-therapy-for-prevention-of-cytomegalovirus-reactivation-in-immunocompetent-critically-ill-patients-a-randomized-clinical-trial
#20
Nicholas J Cowley, Andrew Owen, Sarah C Shiels, Joanne Millar, Rebecca Woolley, Natalie Ives, Husam Osman, Paul Moss, Julian F Bion
Importance: Latent cytomegalovirus (CMV) infection is present in more than half the adult population, and a viral reactivation (ie, when the virus becomes measurable in body fluids such as blood) can occur in up to one-third of these individuals during episodes of critical illness. Objective: To determine whether antiviral therapy is safe and effective for preventing CMV reactivation in a general population of critically ill patients. Design, Setting, and Participants: A single-center, open-label, randomized, controlled clinical trial recruited 124 CMV-seropositive patients undergoing mechanical ventilation for at least 24 hours in the intensive care unit between January 1, 2012, and January 31, 2014...
April 24, 2017: JAMA Internal Medicine
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