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Single-cell morphological analysis for rapid antimicrobial susceptibility test

Single-cell morphological analysis for rapid antimicrobial s...

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International Conference on Solid State Sensors and Actuators (TRANSDUCERS)

作者： J. Choi J. Yoo M. Lee E.-G. Kim J. S. Lee S. Lee S. Joo S. H. Song E.-C. Kim J. C. Lee H. C. Kim Y.-G. Jung S. Kwon Department of Electrical Engineering and Computer Science Seoul National University Seoul Republic of Korea QuantaMatrix Inc. Republic of Korea Interdisciplinary Program of Bioengineering Seoul National University Graduate School Seoul Republic of Korea Department of Laboratory Medicine School of Medicine” Incheon Republic of Korea Department of Laboratory Medicine Seoul National-University Hospital Seoul Republic of Korea Institute of Medical and Biological Engineering Seoul National University Seoul Republic of Korea

A rapid antibiotic susceptibility test (AST) is desperately needed in clinical settings for fast and appropriate antibiotic administration. Traditional ASTs, which rely on cell culture, are not suitable for urgent cases of bacterial infection and antibiotic resistance owing to their relatively long test times. Here, we describe a novel AST called single-cell morphological analysis (SCMA) that can determine antimicrobial susceptibility by automatically analyzing and categorizing morphological changes in single bacterial cells under various antimicrobial conditions. The SCMA was tested with four Clinical and Laboratory Standards Institute standard bacterial strains and 189 clinical samples from hospitals. The results were compared with the gold standard broth microdilution test. The SCMA results were obtained in less than 4 hours with 91.5% categorical agreement and 6.51% minor, 2.56% major, and 1.49% very major discrepancies. Thus, SCMA provides rapid and accurate antimicrobial susceptibility data.

关键词： Microorganisms Antibiotics Strain Immune system Microfluidics Standards Imaging

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Measuring the radiation bands of overhead power lines glass insulators

Measuring the radiation bands of overhead power lines glass ...

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IEEE Conference on Antenna Measurements & Applications (CAMA)

作者： Pedro H. V. Rocha Glauco Fontgalland PPgEE-COPELE Post-Graduate Program in Electrical Engineering Electrical Engineering Department (DEE) Federal University of Campina Grande (UFCG) Campina Grande-PB Brazil

In this paper the characteristics radiation of overhead power lines glass insulators is investigated. Two feeding possibilities are used to analyze the radiation effects. The first feeding point is placed on the cap of the insulator and the second one is connected to the pin. The reflection coefficient (S 11 ) for two insulators covering the band of 30 MHz to 1 GHz was measured. The measurements were performed on insulators with different conservation states: one has a metal frame in good condition and the other one has both cap and pin parts rusted. The measured results show bands with good impedance matching (30 MHz to 200 MHz). The cleaned insulator reached S 11 = -18.7 dB at 127 MHz while -10.87 dB at 121.2 MHz was obtained for the rusty insulator. These spectral bands can be used in the analysis of insulator's conservation state and its interference characteristics.

关键词： Insulators Pollution measurement Transmission line measurements Glass Magnetic fields Resonant frequency Reflection coefficient

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Low-Power Energy Conversion Systems With Two-Phase PM Machine and a Rectifier with Reduced Number of Controlled Switches

Low-Power Energy Conversion Systems With Two-Phase PM Machin...

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IEEE Energy Conversion Congress and Exposition

作者： Cursino B. Jacobina Victor F. M. B. Melo Filipe A. da C. Bahia Italo Roger F. M. P. da Silva Electrical Engineering Department - Federal University of Campina Grande - UFCG Campina Grande Paraiba Brazil Post-Graduate Program in Electrical Engineering - PPgEE - COPELE - UFCG

ISBN: (纸本)9781479957774

This paper presents two energy conversion systems with two-phase permanent magnet (PM) machine and a rectifier with reduced number of controlled switches. The topologies are conceived with the purpose of converting wind energy into electrical energy (i.e., a wind energy conversion system (WECS)) for low power applications. Compared with some three-phase generation systems with reduced number of controlled switches, the proposed topologies permit obtaining sinusoidal controlled machine currents, reducing dc-link voltage and dq currents low harmonic distortion.

关键词： Topology Voltage control Harmonic distortion Legged locomotion Harmonic analysis Control systems Wind energy

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Evaluation of a mobile augmented reality application for image guidance of neurosurgical interventions

Evaluation of a mobile augmented reality application for ima...

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21st Medicine Meets Virtual Reality Conference, NextMed/MMVR 2014

作者： Kramers, Matthew Armstrong, Ryan Bakhshmand, Saeed M. Fenster, Aaron De Ribaupierre, Sandrine Eagleson, Roy Biomedical Engineering Graduate Program University of Western Ontario Canada Department of Clinical Neurological Sciences University of Western Ontario Canada Department of Electrical and Computer Engineering University of Western Ontario Canada Robarts Research Institute University of Western Ontario Canada

ISBN: (纸本)9781614993742

Image guidance can provide surgeons with valuable contextual information during a medical intervention. Often, image guidance systems require considerable infrastructure, setup-time, and operator experience to be utilized. Certain procedures performed at bedside are susceptible to navigational errors that can lead to complications. We present an application for mobile devices that can provide image guidance using augmented reality to assist in performing neurosurgical tasks. A methodology is outlined that evaluates this mode of visualization from the standpoint of perceptual localization, depth estimation, and pointing performance, in scenarios derived from a neurosurgical targeting task. By measuring user variability and speed we can report objective metrics of performance for our augmented reality guidance system.© 2014 The authors and IOS Press. All rights reserved.

关键词： Augmented reality

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PARALLEL AC-DC SINGLE-PHASE ASYMMETRICAL BOOST RECTIFIERS

PARALLEL AC-DC SINGLE-PHASE ASYMMETRICAL BOOST RECTIFIERS

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Annual Conference of the IEEE Industrial Electronics Society

作者： Nustenil S. M. L. Marinus Cursino B. Jacobina Nady Rocha Rodolpho M. B. Cavalcanti Post-Graduate Program in Electrical Engineering - PPgEE - COPELE Electrical Engineering Department (DEE) Federal University of Campina Grande (UFCG) Electrical Engineering Department (DEE) Federal University of Paraiba (UFPB)

ISBN: (纸本)9781479940318

In this paper, three unidirectional single-phase rectifiers are proposed. Each converter is composed of two non-controlled legs and two controlled legs. Modelling and control strategy of the system, including a synchronization method, are proposed. In the synchronization method, the grid current is synchronized with the generated voltage ensuring a sinusoidal grid current without zero-crossover distortions. Analysis of harmonic distortion and semiconductor losses are presented. Simulation and experimental results are shown for validation purposes.

关键词： Topology Synchronization Voltage control Legged locomotion Harmonic distortion Inductors Semiconductor diodes

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Computing stress-related emotional state via frontal cortex asymmetry to be applied in passive-ssBCI

Computing stress-related emotional state via frontal cortex ...

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Biosignals and Biorobotics Conference (BRC), ISSNIP

作者： Anibal C. Atencio Javier C. Garcia Alessandro B. Benevides Berthil B. Longo Andre Ferreira Alexandre Porner-Escher Maria Dolores P. de Souza Teodiano Bastos Post-Graduate Program of Electrical Engineering Federal University of Espirito Santo Vitoria ES Brazil Post-Graduate Program of Biotechnology Federal University of Espirito Santo Vitoria ES Brazil Universidade Federal do Espirito Santo Vitoria ES BR Post-Graduate Program of Psychology Federal University of Espirito Santo Vitoria ES Brazil

The identification of stress-related emotional states allows the use of a passive single-switch BCI (passive-ssBCI) together with a main multi-class BCI. Thus, the passive-ssBCI could work in the background of the main BCI, allowing it to recognize stress-related emotions and to switch to a “stress mode”, which allows a better adaptation to the user current mental state, leading the system to better success rates. Frontal cortex asymmetry gave evidence that greater right frontal activity seems to be more highly related to negative emotional states. In this work, index of asymmetry of alpha band was computed by comparing the power of contra-lateral frontal electrodes. Discrete Wavelet transformation was used to decompose the EEG signals in frequency bands. The power spectral density was then calculated using modified Hamming periodogram. Signals from a public database for the analysis of human affective states, which was labeled with volunteers self-assessment scores, were employed. In order to label negative stress-related emotional state, rules based on valence, arousal and dominance dimensional emotions were defined. The results were promissory, because computed index of asymmetry in the alpha band indicated activity into the right frontal hemisphere was higher than the left one for seven out of nine volunteers during negative emotional states. This index could be employed as switch to a “stress mode” in a passive-ssBCI.

关键词： Indexes Electroencephalography Electrodes Frequency estimation Emotion recognition Switches

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Photonic sensors as imaging tools for industrial monitoring

Photonic sensors as imaging tools for industrial monitoring

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Optical Sensors, 2014

作者： Martelli, Cicero Da Silva, Marco J. Da Silva, Jean C.C. Morales, Rigoberto E.M. Da Silva, Erlon V. Zamarreño, Carlos R. Baroncini, Virginia Mezzadri, Felipe Patyk, Rodolfo Dutra, Guilherme Bazzo, João Vendruscolo, Tiago P. Graduate Program in Electrical and Computer Engineering Federal University of Technology - Paraná Curitiba PR80230-901 Brazil Department of Mechanical Engineering Federal University of Technology - Paraná Curitiba PR80230-901 Brazil Tractebel Energia S/A Quedas do Iguaçu PR Brazil Electrical and Electronic Engineering Department Public University of Navarra Pamplona NA Spain

Single point, quasi-distributed and distributed optical (fiber) sensors are demonstrated to be robust and reliable tools for one, two and three dimensional imaging of physical phenomena in industrial monitoring. Real ... 详细信息

ISBN: (纸本)9781557528209

关键词： Fiber Bragg gratings Image sensors Sensors Spatial resolution Temperature sensors Three dimensional imaging Fiber Bragg gratings (060.3735) Optical sensing and sensors (280.4788) Flow diagnostics (280.2490)

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RepoSDN: An repository organization and coordination method of software defined networks applications

RepoSDN: An repository organization and coordination method ...

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IEEE Symposium on Network Operations and Management

作者： Rômulo S. Pinheiro Billy A. Pinheiro Rafael P. Esteves Antônio J. G. Abelém Computer Science Post-graduation Program (PPGCC) Federal University of Pará (UFPA) Electrical Engineering Post-graduation Program (PPGEE) Federal University of Pará (UFPA) Federal University of Rio Grande do Sul (UFRGS)

ISBN: (纸本)9781479909117

programmability is one of the key factors on software defined networks (SDN), once it allows to decouple between data plan and control plan. However, in such context, managing several applications' inputs and outputs is a little explored task on controllers field, which are not in a controlled and organized environment. This article proposes a method to make SDN applications to reach the administrator, allow him to manage his use in the network. This proposal is validated through performance tests in the repository, which stores the applications, along with developed modules to help its management and control, making the organization and coordination method safe, efficient and adjustable to any controller on software-defined network.

关键词： Software computer architecture Organizations Servers Hardware Process control Standards organizations

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AC drive systems based on six-phase machine with three neutrals

AC drive systems based on six-phase machine with three neutr...

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IEEE/IAS International Conference on Industry Applications (INDUSCON)

作者： Reuben P. R. Sousa Cursino B. Jacobina Victor F. B. Melo Nayara B. de Freitas Post-Graduate Program in Electrical Engineering - PPgEE Bairro Universitário Campina Grande Paraíba Brazil Department of Electrical Engineering - DEE Bairro Universitário Campina Grande Paraíba Brazil

This paper presents an AC drive system based on six-phase machine with three neutrals. The machine side converter has nine power legs and can be connected to the grid through one single DC-link or three isolated DC-links. Compared with the conventional back-to-back AC six-phase machine drive system, the proposed drive system permits reducing the DC-link voltages, eliminating step-up transformer, and the voltage at the grid side converter has higher amplitude than that of the machine side, reducing the transmission I 2 R losses. The system model and PWM strategy are presented and experimental results demonstrate the feasibility of the system.

关键词： Vectors Inverters Pulse width modulation Torque Integrated circuit modeling Switches electrical engineering

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Multi-scale bio-inspired place recognition

Multi-scale bio-inspired place recognition

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IEEE International Conference on Robotics and Automation (ICRA)

作者： Zetao Chen Adam Jacobson Uğur M. Erdem Michael E. Hasselmo Michael Milford School of Electrical Engineering Computer Science at the Queensland University of Technology Center for Memory and Brain and Graduate Program for Neuroscience at Boston University

This paper presents a novel place recognition algorithm inspired by the recent discovery of overlapping and multi-scale spatial maps in the rodent brain. We mimic this hierarchical framework by training arrays of Support Vector Machines to recognize places at multiple spatial scales. Place match hypotheses are then cross-validated across all spatial scales, a process which combines the spatial specificity of the finest spatial map with the consensus provided by broader mapping scales. Experiments on three real-world datasets including a large robotics benchmark demonstrate that mapping over multiple scales uniformly improves place recognition performance over a single scale approach without sacrificing localization accuracy. We present analysis that illustrates how matching over multiple scales leads to better place recognition performance and discuss several promising areas for future investigation.

关键词： Training Support vector machines Feature extraction Rodents Image segmentation Robot sensing systems

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