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https://www.readbyqxmd.com/read/28437975/experimental-demonstration-of-efficient-quantum-state-tomography-of-matrix-product-states
#1
Yuan-Yuan Zhao, Zhibo Hou, Guo-Yong Xiang, Yong-Jian Han, Chuan-Feng Li, Guang-Can Guo
Quantum state tomography is a key technology for fully determining a quantum state. Unfortunately, standard quantum state tomography is intractable for general many-body quantum states, because the number of measurements and the post-processing time increase exponentially with the size of the system. However, for the matrix product states (MPSs), there exists an efficient method using linearly scaled local measurements and polynomially scaled post-processing times. In this study, we demonstrate the validity of the method in practice by reconstructing a four-photon MPS from its local two- or three-photon reduced-density matrices with the presence of statistical errors and systematical errors in experiment...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437969/experimental-generation-of-complex-optical-fields-for-diffraction-limited-optical-focus-with-purely-transverse-spin-angular-momentum
#2
Jian Chen, Chenhao Wan, Lingjiang Kong, Qiwen Zhan
We demonstrate a method to generate complex optical fields at the pupil plane of a high numerical aperture (NA) objective lens for the creation of diffraction limited optical focus with purely transverse spin angular momentum. The complex optical fields are analytically deduced through reversing the radiated patterns from two electric dipoles, which are located at the focal point of the high NA lens and oscillate respectively in x- and z- directions with phase difference of π/2. The derived fields can be experimentally created with a vectorial optical field generator...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437943/power-allocation-for-uniform-illumination-with-stochastic-led-arrays
#3
G V S S Praneeth Varma, Rayapati Sushma, Vandana Sharma, Abhinav Kumar, G V V Sharma
In this paper, a simple heuristic power allocation scheme is proposed for a random LED array to obtain uniform irradiance on the projection surface. This is done by considering a binomial point process (BPP) for modeling the LED location and using the quality factor as a performance metric. Numerical results are provided to validate the proposed model and demonstrate its simplicity over existing LED geometries.
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437929/robust-overlay-metrology-with-differential-mueller-matrix-calculus
#4
Xiuguo Chen, Honggang Gu, Hao Jiang, Chuanwei Zhang, Shiyuan Liu
Overlay control is of vital importance to good device performances in semiconductor manufacturing. In this work, the differential Mueller matrix calculus is introduced to investigate the Mueller matrices of double-patterned gratings with overlay displacements, which helps to reveal six elementary optical properties hidden in the Mueller matrices. We find and demonstrate that, among these six elementary optical properties, the linear birefringence and dichroism, LB' and LD', along the ± 45° axes show a linear response to the overlay displacement and are zero when the overlay displacement is absent at any conical mounting...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437927/precision-measurement-of-magnetic-field-based-on-the-transient-process-in-a-k-rb-sup-21-sup-ne-co-magnetometer
#5
Wei Quan, Kai Wei, Hairong Li
We demonstrate a novel method of measuring magnetic field based on the transient signal of the K-Rb-<sup>21</sup>Ne co-magnetometer operating in nuclear spin magnetization self-compensation magnetic field regime. The operation condition for self-compensation magnetic field by nuclear spin magnetization of <sup>21</sup>Ne in steady state is presented. We characterize the dynamics of the coupled spin ensembles by a set of Bloch equations, and formulate the expression of transient output signal...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437922/from-toes-to-top-of-atmosphere-fowler-s-sneaker-depth-index-of-water-clarity-for-the-chesapeake-bay
#6
Benjamin Crooke, Lachlan I W McKinna, Ivona Cetinić
Fowler's Sneaker Depth (FSD), analogous to the well known Secchi disk depth (Zsd), is a visually discerned citizen scientist metric used to assess water clarity in the Patuxent River estuary. In this study, a simple remote sensing algorithm was developed to derive FSD from space-borne spectroradiometric imagery. An empirical model was formed that estimates FSD from red-end remote sensing reflectances at 645 nm, Rrs(645). The model is based on a hyperbolic function relating water clarity to Rrs(645) that was established using radiative transfer modeling and fine tuned using in-water FSD measurements and coincident Rrs(645) data observed by NASA's Moderate Resolution Imaging Spectroradiometer aboard the Aqua spacecraft (MODISA)...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437867/robustness-assessment-of-urban-road-network-with-consideration-of-multiple-hazard-events
#7
Yaoming Zhou, Jiuh-Biing Sheu, Junwei Wang
Robustness measures a system's ability of being insensitive to disturbances. Previous studies assessed the robustness of transportation networks to a single disturbance without considering simultaneously happening multiple events. The purpose of this article is to address this problem and propose a new framework to assess the robustness of an urban transportation network. The framework consists of two layers. The upper layer is to define the robustness index based on the impact evaluation in different scenarios obtained from the lower layer, whereas the lower layer is to evaluate the performance of each hypothetical disrupted road network given by the upper layer...
April 24, 2017: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/28437838/prognostic-relevance-of-mir-124-3p-and-its-target-tp53inp1-in-pediatric-ependymoma
#8
Yulia Margolin-Miller, Natalia Yanichkin, Keren Shichrur, Helen Toledano, Anat Ohali, Theophilos Tzaridis, Shalom Michowitz, Suzana Fichman-Horn, Meora Feinmesser, Stefan M Pfister, Hendrik Witt, Uri Tabori, Eric Bouffet, Vijay Ramaswamy, Cynthia Hawkins, Michael D Taylor, Isaac Yaniv, Smadar Avigad
Ependymoma is a malignant pediatric brain tumor, often incurable under the current treatment regimen. We aimed to evaluate the expression of microRNAs (miRs) in pediatric ependymoma tumors in an attempt to identify prognostic molecular markers which would lead to potential therapeutic targets. Following miR-array expression analysis, we focused on 9 miRs that correlated with relapse which were further validated by quantitative real time PCR (qRT-PCR) in a cohort of 67 patients. Western blotting and immunohistochemistry were used to measure target protein expression in 20 and 34 tumor samples, respectively...
April 24, 2017: Genes, Chromosomes & Cancer
https://www.readbyqxmd.com/read/28437836/nurses-attitudes-toward-the-single-checking-of-medications
#9
Rachel Cross, Paul N Bennett, Cherene Ockerby, Wei Chun Wang, Judy Currey
BACKGROUND AND AIM: The policy of single over double checking of medications has been adopted by many health services; however, nurses' attitudes toward single-checking medications remains unclear. The aim of this study was to explore the attitudes of nurses who single check and administer medications in a setting where single checking has been in place for over a decade. METHODS: A cross-sectional survey design using the validated Single Checking Administration Medication Scale-II to registered nurses (n = 299) working in one metropolitan teaching hospital in Victoria, Australia...
April 24, 2017: Worldviews on Evidence-based Nursing
https://www.readbyqxmd.com/read/28437825/-quality-of-life-and-functional-outcome-after-microsurgical-decompression-in-lumbar-spinal-stenosis-a-register-study
#10
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/28437781/the-reliability-and-criterion-validity-of-2d-video-assessment-of-single-leg-squat-and-hop-landing
#11
Lee Herrington, Faisal Alenezi, Msaad Alzhrani, Hasan Alrayani, Richard Jones
The objective was to assess the intra-tester, within and between day reliability of measurement of hip adduction (HADD) and frontal plane projection angles (FPPA) during single leg squat (SLS) and single leg landing (SLL) using 2D video and the validity of these measurements against those found during 3D motion capture. 15 healthy subjects had their SLS and SLL assessed using 3D motion capture and video analysis. Inter-tester reliability for both SLS and SLL when measuring FPPA and HADD show excellent correlations (ICC2,1 0...
April 17, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28437750/becoming-comfortable-with-my-epilepsy-strategies-that-patients-use-in-the-journey-from-diagnosis-to-acceptance-and-disclosure
#12
Sinead Pembroke, Agnes Higgins, Niall Pender, Naomi Elliott
OBJECTIVE: Proponents of resilience theory have highlighted the importance of understanding the processes of resilience. The objective of the study was to explore how people with epilepsy reach a stage of being comfortable with their epilepsy. Identifying the processes used is important to developing effective self-management for people who are newly diagnosed with epilepsy. METHOD: A grounded theory approach involving forty-nine consenting adult people with epilepsy (18 years and over), was used to explore their first-hand experiences of coming to terms with their epilepsy...
April 19, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28437742/biological-treatment-of-model-dyes-and-textile-wastewaters
#13
Alicia Paz, Julia Carballo, María José Pérez, José Manuel Domínguez
Previous works conducted in our laboratory, reveled that Bacillus aryabhattai DC100 produce ligninolytic enzymes such as laccases and/or peroxidases, opening new applications in different bioprocesses, including the treatment of disposal residues such as dyestuffs from textile processing industries. This work described the degradation of three commercial model dyes Coomassie Brilliant Blue G-250 (CBB), Indigo Carmine (IC) and Remazol Brilliant Blue R (RBBR) under different culture media and operational conditions...
April 18, 2017: Chemosphere
https://www.readbyqxmd.com/read/28437738/simultaneous-spectrophotometric-determination-of-glimepiride-and-pioglitazone-in-binary-mixture-and-combined-dosage-form-using-chemometric-assisted-techniques
#14
Asmaa A El-Zaher, Ehab F Elkady, Hanan M Elwy, Mahmoud Abo El Makarim Saleh
In the present work, pioglitazone and glimepiride, 2 widely used antidiabetics, were simultaneously determined by a chemometric-assisted UV-spectrophotometric method which was applied to a binary synthetic mixture and a pharmaceutical preparation containing both drugs. Three chemometric techniques - Concentration residual augmented classical least-squares (CRACLS), principal component regression (PCR), and partial least-squares (PLS) were implemented by using the synthetic mixtures containing the two drugs in acetonitrile...
March 14, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28437735/detective-quantum-efficiency-dqe-in-pet-scanners-a-simulation-study
#15
George E Karpetas, Christos M Michail, George P Fountos, Nektarios I Kalyvas, Ioannis G Valais, Ioannis S Kandarakis, George S Panayiotakis
The aim of the present study is to introduce the detective quantum efficiency (DQE) for the image quality assessment of positron emission tomography (PET) scanners. For this purpose, a thin layer chromatography (TLC) plane source was simulated using a previously validated, scanner and source geometry, Monte Carlo (MC) model. The model was developed with the Geant4 application for tomographic emission (GATE) MC package and reconstructed images obtained with the software for tomographic image reconstruction (STIR), with cluster computing...
April 12, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28437720/determination-of-a-novel-anticancer-ampk-activator-hernandezine-in-rat-plasma-and-tissues-with-a-validated-uhplc-ms-ms-method-application-to-pharmacokinetics-and-tissue-distribution-study
#16
Yang Song, Zhibin Wang, Baozhen Zhang, Yujia Zhang, Weipeng Zhang, Chunjuan Yang, Fanhao Meng, Xuesong Feng
Hernandezine, a novel anticancer AMPK activator, is a major active constituent of Thalictrum Ranunculaceae. A simple, specific and sensitive liquid chromatography tandem mass spectrometry (LC-MS/MS) method has been developed and validated for the quantification of hernandezine in rat plasma and tissues after intravenous administration. Sample preparation was carried out through a protein-precipitation extraction with acetonitrile using tetrandrine as internal standard (IS). The chromatographic separation was achieved by using an Agilent ZORBAX Eclipse Plus C18 column with a mobile phase of acetonitrile and water (containing 10mM ammonium acetate) in an isocratic elution way...
April 8, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28437718/nontargeted-metabolomics-approach-for-the-differentiation-of-cultivation-ages-of-mountain-cultivated-ginseng-leaves-using-uhplc-qtof-ms
#17
Xiangwei Chang, Juanjuan Zhang, Dekun Li, Dazheng Zhou, Yuling Zhang, Jincheng Wang, Bing Hu, Aichun Ju, Zhengliang Ye
The adulteration or falsification of the cultivation age of mountain cultivated ginseng (MCG) has been a serious problem in the commercial MCG market. To develop an efficient discrimination tool for the cultivation age and to explore potential age-dependent markers, an optimized ultra high-performance liquid chromatography/quadrupole time-of-flight mass spectrometry (UHPLC/QTOF-MS)-based metabolomics approach was applied in the global metabolite profiling of 156 MCG leaf (MGL) samples aged from 6 to 18 years...
April 13, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28437713/reference-intervals-for-serum-24-25-dihydroxyvitamin-d-and-the-ratio-with-25-hydroxyvitamin-d-established-using-a-newly-developed-lc-ms-ms-method
#18
Jonathan C Y Tang, Holly Nicholls, Isabelle Piec, Christopher J Washbourne, John J Dutton, Sarah Jackson, Julie Greeves, William D Fraser
24,25(OH)2D is the product of 25(OH)D catabolism by CYP24A1. The measurement of serum 24,25(OH)2D concentration may serve as an indicator of vitamin D catabolic status and the relative ratio with 25(OH)D can be used to identify patients with inactivating mutations in CYP24A1. We describe a LC-MS/MS method to determine: (1) the relationships between serum 24,25(OH)2D and 25(OH)D; (2) serum reference intervals in healthy individuals; (3) the diagnostic accuracy of 24,25(OH)2D measurement as an indicator for vitamin D status; 4) 24,25(OH)2D cut-off value for clinically significant change between inadequate and sufficient 25(OH)D status...
April 12, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28437688/application-of-near-infrared-spectroscopy-for-the-rapid-quality-assessment-of-radix-paeoniae-rubra
#19
Hao Zhan, Jing Fang, Liying Tang, Hongjun Yang, Hua Li, Zhuju Wang, Bin Yang, Hongwei Wu, Meihong Fu
Near-infrared (NIR) spectroscopy with multivariate analysis was used to quantify gallic acid, catechin, albiflorin, and paeoniflorin in Radix Paeoniae Rubra, and the feasibility to classify the samples originating from different areas was investigated. A new high-performance liquid chromatography method was developed and validated to analyze gallic acid, catechin, albiflorin, and paeoniflorin in Radix Paeoniae Rubra as the reference. Partial least squares (PLS), principal component regression (PCR), and stepwise multivariate linear regression (SMLR) were performed to calibrate the regression model...
April 20, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28437681/predicting-wellbeing-among-people-with-epilepsy-using-illness-cognitions
#20
Kirstie A Salter, Kirsty N Prior, Malcolm J Bond
OBJECTIVE: This study sought to examine the synergistic contribution of illness-related perceptions (stigma, severity, and threat) and illness behavior to wellbeing among people with epilepsy. Poorer wellbeing was expected among those who perceived greater stigma, illness severity, and threat and had more extreme illness behavior. METHODS: Individuals with a diagnosis of epilepsy (N=210), recruited through local and online support groups, completed a questionnaire comprising demographic and epilepsy-specific information, and validated measures of illness perceptions and behavior, epilepsy-related quality of life, and general psychological health...
April 21, 2017: Epilepsy & Behavior: E&B
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