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Erratum to: Methods for evaluating medical tests and biomarkers

Diagnostic and prognostic research 2017年第1期1卷 11页

作者： Gowri Gopalakrishna Miranda Langendam Rob Scholten Patrick Bossuyt Mariska Leeflang Anna Noel-Storr James Thomas Iain Marshall Byron Wallace Penny Whiting Clare Davenport Gowri GopalaKrishna Isabel de Salis Sue Mallett Robert Wolff Richard Riley Marie Westwood Jos Kleinen Gary Collins Hans Reitsma Karel Moons Antonia Zapf Annika Hoyer Katharina Kramer Oliver Kuss J Ensor J J Deeks E C Martin R D Riley Gerta Rücker Susanne Steinhauser Martin Schumacher Joie Ensor Kym Snell Brian Willis Thomas Debray Jon Deeks Lavinia Ferrante di Ruffano Sian Taylor-Phillips Chris Hyde Stuart A Taylor Gauraang Batnagar Lavinia Ferrante Di Ruffano Farah Seedat Aileen Clarke Sarah Byron Frances Nixon Rebecca Albrow Thomas Walker Carla Deakin Zhivko Zhelev Harriet Hunt Yaling Yang Lucy Abel James Buchanan Thomas Fanshawe Bethany Shinkins Laure Wynants Jan Verbakel Sabine Van Huffel Dirk Timmerman Ben Van Calster Aeliko Zwinderman Jason Oke Jack O'Sullivan Rafael Perera Brian Nicholson Hannah L Bromley Tracy E Roberts Adele Francis Denniis Petrie G Bruce Mann Kinga Malottki Holly Smith Lucinda Billingham Alice Sitch Oke Gerke Mie Holm-Vilstrup Eivind Antonsen Segtnan Ulrich Halekoh Poul Flemming Høilund-Carlsen Bernard G Francq Jac Dinnes Julie Parkes Walter Gregory Jenny Hewison Doug Altman William Rosenberg Peter Selby Julien Asselineau Paul Perez Aïssatou Paye Emilie Bessede Cécile Proust-Lima Christiana Naaktgeboren Joris de Groot Anne Rutjes Johannes Reitsma Emmanuel Ogundimu Jonathan Cook Yannick Le Manach Yvonne Vergouwe Romin Pajouheshnia Rolf Groenwold Karen Moons Linda Peelen Daan Nieboer Bavo De Cock Micael J Pencina Ewout W Steyerberg Jennifer Cooper Nick Parsons Chris Stinton Steve Smith Andy Dickens Rachel Jordan Alexandra Enocson David Fitzmaurice Peymane Adab Charles Boachie Gaj Vidmar Karoline Freeman Martin Connock Rachel Court Carl Moons Jessica Harris Andrew Mumford Zoe Plummer Kurtis Lee Barnaby Reeves Chris Rogers Veerle Verheyden Gianni D Angelini Gavin J Murphy Jeremy Huddy Melody Ni Katherine Good Graham Cooke 1Department of Clinical Epidemiology Biostatistics & Bioinformatics Academic Medical Center University of Amsterdam Amsterdam The Netherlands. 2Cochrane Netherlands Julius Center for Health Sciences and Primary Care University Medical Center Utrecht Utrecht Netherlands. 234Department of Clinical Epidemiology Biostatistics & Bioinformatics Academic Medical Center University of Amsterdam Amsterdam The Netherlands. 49Department of Clinical Epidemiology Biostatistics & Bioinformatics Academic Medical Center University of Amsterdam Amsterdam The Netherlands. 3Cochrane Dementia and Cognitive Improvement Group University of Oxford Oxford UK. 4EPPI-Centre Department of Social Science University College London London UK. 5Division of Health and Social Care Research King's College London London UK. 6College of Computer and Information Science Northeastern University Boston USA. 13University Hospitals Bristol NHS Foundation Trust School of Social and Community Medicine Bristol UK. 275Institute of Applied Health Research University of Birmingham Birmingham UK. 9Department of Clinical Epidemiology Biostatistics & Bioinformatics Academic Medical Center University of Amsterdam Amsterdam The Netherlands. 10School of Social and Community Medicine University of Bristol Bristol UK. 179Institute of Applied Health Research University of Birmingham Birmingham UK. 12Kleijnen Systematic Reviews Ltd York UK. 25Research Institute for Primary Care and Health Sciences Keele University Keele UK. 188Centre for Statistics in Medicine Nuffield Department of Orthopaedics Rheumatology and Musculoskeletal Sciences University of Oxford Oxford UK. 191Julius Center for Health Sciences and Primary Care University Medical Center Utrecht 3584 CG Utrecht Netherlands. 237Julius Center for Health Sciences and Primary Care University Medical Center Utrecht 3584 CG Utrecht Netherlands. 18Department of Medical Statistics University Medical Center Göttingen Göttingen Germany. 19Institute for B

[This corrects the article DOI: 10.1186/s41512-016-0001-y.].

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Recovery of absorption spectra from fourier transform infrared microspectroscopic measurements of intact spheres

Recovery of absorption spectra from fourier transform infrar...

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Frontiers in Optics, FIO 2013

作者： Dijk, Thomas van Mayerich, David Scott. Carney, P. Bhargava, Rohit Beckman Institute for Advanced Science and Technology University of Illinois Cancer Center 405 N Mathews Ave Urbana Il 61801 United States Department of Electrical and Computer Engineering University of Illinois Cancer Center 405 N Mathews Ave Urbana Il 61801 United States Department of Bioengineering and Mechanical Science and Engineering University of Illinois Cancer Center 405 N Mathews Ave Urbana Il 61801 United States

In infrared microscopy the structure and the chemistry of a sample get commingled, distorting the recorded spectra and rendering them useless for chemical identification. We provide a model to recover the material res... 详细信息

ISBN: (纸本)9781557529879

关键词： Absorption spectroscopy Chemistry Fourier transforms Infrared microscopy Light focusing Refractive index Inverse scattering (290.3200) Mie theory (290.4020)

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Optimization of the Raman signal in suspensions of nanoparticle aggregates

Optimization of the Raman signal in suspensions of nanoparti...

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Frontiers in Optics, FIO 2013

作者： Dijk, Thomas Van Bhargava, Rohit Scott Carney, P. Beckman Institute for Advanced Science and Technology 405 N Mathews Ave Urbana Il 61801 United States Department of Electrical and Computer Engineering 405 N Mathews Ave Urbana Il 61801 United States Department of Bioengineering University of Illinois at Urbana-Champaign 405 N Mathews Ave Urbana Il 61801 United States

Nanoparticles enhance local fields to amplify surface enhanced Raman spectroscopic signals. Field enhancement also increases optical extinction, unexpectedly shifting the maximum Raman scattering away from resonance. ... 详细信息

ISBN: (纸本)9781557529879

关键词： Light absorption

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Locating and monitoring tenants in PV based buildings

Locating and monitoring tenants in PV based buildings

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International Conference on Renewable Energy Research and Applications (ICRERA)

作者： Duarte Arrobe João Martins Celson Lima Electrical Engineering Department Universidade Nova de Lisboa Portugal Computer Science program Federal University of Western Pará Brasil

ISBN: (纸本)9781479914630

This paper describes a wireless location and occupancy system used to create house and user energetic profile systems. Both procedures will be used to raise consumers' energy awareness in PV efficient building systems. Home energy consumption must be improved in order to evolve towards Net Zero Energy Buildings. Only the combine use of home PV grid-connected power systems with the active and responsible citizen's engagement in addressing the carbon and energy reduction challenge will allow homes and buildings to become Net Zero Energy Buildings. The developed system is composed by two subsystems. The first one (designated as WiLOS) deals with the problem of users' location inside a building, while the second (designated as HUEPS) uses the energy consumption of the building and the location information to create the users' energetic profiles. Both subsystems are described and experimental data is presented in order to show the effectiveness of the proposed methodology.

关键词： Buildings Presses Wireless communication IEEE 802.11 Standards Mobile handsets Renewable energy sources Energy consumption

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Optimization of a z-source DC circuit breaker

Optimization of a z-source DC circuit breaker

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2013 5th IEEE Electric Ship Technologies Symposium, ESTS 2013

作者： Prempraneerach, P. Angle, M.G. Kirtley Jr., J.L. Karniadakis, G.E. Chryssostomidis, C. Mechanical Engineering Department Rajamangala University of Technology Thunyaburi Pathumthani 12110 Thailand Electrical Engineering and Computer Science Department Research Laboratory for Electronics MIT Cambridge MA 02139 United States Division of Applied Mathematics Brown University Providence RI 02912 United States MIT Sea Grant College Program Department of Mechanical Engineering MIT Cambridge MA 02138 United States

ISBN: (纸本)9781467352437

DC faults may cause severe disruptions in continuity of service to vital loads in a shipboard integrated power system, hence detection, isolation, and protection against such faults must be incorporated in both medium-voltage DC (MVDC) and low-voltage DC (LVDC) systems. Here we consider the effectiveness of existing z-source breakers and propose several new designs more appropriate for fault detection in MVDC and LVDC systems. In particular, we perform an optimization study that aims to minimize dissipation and weight and we identify the key parameters for use in MVDC and LVDC systems. Preliminary verification and validation studies are also included. © 2013 IEEE.

关键词： Electric circuit breakers

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A bio-inspired hemispherical lens based on reflecting superposition compound eye optics

A bio-inspired hemispherical lens based on reflecting superp...

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2013 17th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS and EUROSENSORS 2013

作者： Huang, C.-C. Aldalali, B. Wu, X. Jiang, H. Department of Electrical and Computer Engineering University of Wisconsin - Madison Madison WI United States McPherson Eye Research Institute University of Wisconsin-Madison Madison WI United States Materials Science Program University of Wisconsin-Madison Madison WI United States Department of Biomedical Engineering University of Wisconsin - Madison Madison WI United States

ISBN: (纸本)9781467359818

This paper presents the design and fabrication of a 3-dimensional (3-D), hemispherical lens based on reflecting superposition compound eye (RSCE) optics. The configuration of our hemispherical lens, similar to that of natural RSCEs, consists of a large-area array of reflective, high aspect-ratio, micro-square-tubes fabricated on a transparent, flexible and hemispherical polydimethylsiloxane (PDMS) membrane via a peeling micro-printing process. The dimensions of the micro-square-tubes are on the order of tens of microns. Unlike ordinary lenses, our RSCE device focuses light based on reflection rather than refraction. The hemispherical RSCE lens was able to focus a collimated and a non-collimated light source, respectively, with a focal length of 1.5 cm. The imaging performance was consistent with theoretic prediction based on the geometric optics model and ray-tracing technique. The device also achieved a wide field of view (FOV) of up to 100°. © 2013 IEEE.

关键词： Light

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Validating a new methodology for strain estimation from cardiac cine MRI

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AIP Conference Proceedings 2013年第1期1559卷 277-286页

作者： Ahmed Elnakib Garth M. Beache Georgy Gimel'farb Tamer Inanc Ayman El-Baz BioImaging Laboratory Bioengineering Department University of Louisville Louisville KY USA Department of Diagnostic Radiology School of Medicine University of Louisville Louisville KY USA Department of Computer Science University of Auckland Auckland New Zealand Department of Electrical and Computer Engineering University of Louisville Louisville KY USA

This paper focuses on validating a novel framework for estimating the functional strain from cine cardiac magnetic resonance imaging (CMRI). The framework consists of three processing steps. First, the left ventricle (LV) wall borders are segmented using a level-set based deformable model. Second, the points on the wall borders are tracked during the cardiac cycle based on solving the Laplace equation between the LV edges. Finally, the circumferential and radial strains are estimated at the inner, mid-wall, and outer borders of the LV wall. The proposed framework is validated using synthetic phantoms of the material strains that account for the physiological features and the LV response during the cardiac cycle. Experimental results on simulated phantom images confirm the accuracy and robustness of our method.

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Deformation of Porous, Nanostructured Silver at Room Temperature and 150 °C

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MRS Online Proceedings Library 2013年第1期1513卷 1-6页

作者： Noiseau, Guillaume Becker, Michael F. Keto, John W. Kovar, Desiderio Materials Science and Engineering Graduate Program The University of Texas at Austin Austin USA Department of Electrical and Computer Engineering The University of Texas Austin USA Department of Physics The University of Texas Austin USA Department of Mechanical Engineering The University of Texas Austin USA

Porous, nanostructured silver samples were produced using a direct-write method where a nanoparticle aerosol consisting of particles with a mean size of approximately 5 nm were accelerated to speeds of approximately 1000 m/sec and impacted onto a translating substrate [1]. The impacting particles have sufficient energy to stick to the substrate, allowing patterned thick films to be directly written from the aerosol without a mask. Unlike other low temperature processing routes for achieving patterned films, no organics are added that can interfere with postdeposition processing. Typical films are 5- 100 μm thick, up to several centimeters long, and have an as-deposited relative densities as high as 70% of bulk Ag. Compression tests were carried out in steps at room temperature and at 150°C under constant displacement rates. Local strain and densification were measured by optical profilometry between each compression step. The results can be used as a starting point to better understand the mechanisms that govern plasticity, creep, and sintering in nanostructured, porous silver at low processing temperatures.

关键词： Ag densification nanoscale

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A new shape-based framework for the left ventricle wall segmentation from cardiac first-pass perfusion mri

A new shape-based framework for the left ventricle wall segm...

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IEEE International Symposium on Biomedical Imaging

作者： F. Khalifa G. M. Beache A. Elnakib H. Sliman G. Gimel'farb K. C. Welch A. El-Baz Bioengineering Department University of Louisville Louisville KY USA Radiology Department School of Medicine University of Louisville Louisville KY USA Department of Computer Engineering and Computer Science University of Louisville Louisville KY USA Department of Computer Science University of Auckland Auckland New Zealand Electrical and Computer Engineering Department University of Louisville Louisville KY USA

ISBN: (纸本)9781467364560

We propose a shape-based approach for the segmentation of the left ventricle (LV) wall on cardiac first-pass magnetic resonance imaging (FP-MRI) using level sets. To reduce the variabilities of the LV wall in FP-MRI, it is first imperative to co-align the time series images to account for the global and local motions of the heart. Therefore, we developed a two-step registration methodology that includes an affine-based registration followed by a local B-splines based alignment to maximize a similarity function that accounts for the first- and second-order normalized mutual information (NMI). Additionally, myocardial signal intensity varies with the agent transit, which makes it difficult to control the level set evolution using image intensities alone. Thus, we constrained the level set evolution using three features: a weighted probabilistic shape prior, the first-order pixel-wise image intensities, and a second-order Markov-Gibbs random field (MGRF) spatial interaction model. We tested our approach on 24 data sets in 8 infarction patients using the Dice similarity coefficient (DSC), comparing our approach to other shape-based segmentation approaches. We also tested the performance of our segmentation approach using the receiver operating characteristics (ROC). Our approach achieved a mean DSC value of 0.910±0.037 compared to other shape-based methods that achieved 0.862±0.045 and 0.844±0.047. Finally, the ROC analysis for our segmentation method showed the best performance, with area under the ROC curve of 0.92, while that for intensity showed the worst performance, with area under the ROC curve of 0.69.

关键词： Image segmentation Shape Magnetic resonance imaging Myocardium Biomedical imaging Level set Time series analysis

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Twin-T Oscillator Containing Polymer Coated Parallel Plate Capacitor for Sea Water Salinity Sensing

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Open Journal of Applied Biosensor 2013年第2期2卷 57-64页

作者： Shreyas Bhatt Abdur Rub Abdur Rahman Sunil K. Arya Shekhar Bhansali Bioelectronics Program Institute of Microelectronics A*Star Singapore Science Park II Singapore City Singapore BioMEMS and Microsystems Lab Department of Electrical Engineering University of South Florida Tampa USA Department of Electrical and Computer Engineering Florida International University Miami FL USA

This paper presents the development of a Twin-T oscillator comprising polymer coated parallel plates as a sensor for ocean water salinity *** sensor employs a parallel plate capacitor design, with sea water serving as the medium between plates. Novalac resin and a proprietary commercial polymer (AccufloTW) were investigated as corrosion protective coatings for the copper electrodes of the capacitor. Electrochemical Impedance Spectroscopy (EIS) was employed to evaluate corrosion inhibition of polymer coatingin sea water. A detection circuit was designed and simulated using P-spice and then implemented in Printed Circuit Board (PCB). EIS results indicate that Accuflo exhibits better corrosion inhibition in ocean water than Novolac. Further, the use of Twin-T oscillator based detection circuit resulted in enhanced sensitivity and better detection limit. Experiments performed using ocean water samples resulted in oscillator frequency shift of 410 Hertz/power supply unit (Hz/PSU). Oscillator frequency drift was reduced using frequency-to-voltage converters and sensitivity of 10 mV/PSU was achieved.

关键词： Impedance Spectroscopy Salinity Sensing Capacitive Sensors Polymer Coating Twin-T Oscillator

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