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https://www.readbyqxmd.com/read/28437999/novel-programmable-microwave-photonic-filter-with-arbitrary-filtering-shape-and-linear-phase
#1
Xiaoqi Zhu, Feiya Chen, Huanfa Peng, Zhangyuan Chen
We propose and demonstrate a novel optical frequency comb (OFC) based microwave photonic filter which is able to realize arbitrary filtering shape with linear phase response. The shape of filter response is software programmable using finite impulse response (FIR) filter design method. By shaping the OFC spectrum using a programmable waveshaper, we can realize designed amplitude of FIR taps. Positive and negative sign of FIR taps are achieved by balanced photo-detection. The double sideband (DSB) modulation and symmetric distribution of filter taps are used to maintain the linear phase condition...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437914/a-sagnac-fourier-spectrometer
#2
Matthias Lenzner, Jean-Claude Diels
A spectrometer based on a Sagnac interferometer, where one of the mirrors is replaced by a transmission grating, is introduced. Since the action of a transmission grating is reversible, both directions experience the same diffraction at a given wavelength. At the output, the crossed wavefronts are imaged onto a camera, where their Fizeau fringe pattern is recorded. Each spectral element produces a unique spatial frequency, hence the Fourier transform of the recorded interferogram contains the spectrum. Since the grating is tuned to place zero spatial frequency at a selected wavelength, the adjoining spectrum is heterodyned with respect to this wavelength...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437892/high-performance-and-low-cost-transparent-electrodes-based-on-ultrathin-cu-layer
#3
David Ebner, Martin Bauch, Theodoros Dimopoulos
Transparent electrodes based on an ultrathin Cu layer, embedded between two dielectrics, are optimized by simulations and experiments. Different dielectrics are screened in transfer matrix simulations for maximizing the broad-band transmittance. Based on this, sputtered electrodes were developed with the Cu embedded between TiO<sub>X</sub>-coated glass or PET substrate and an Al-doped ZnO (AZO) top layer. It is found that, for ultrathin Cu layers, increased sputter power fosters island coalescence, leading to superior optical and electrical performance compared to previously reported Cu-based electrodes...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437836/nurses-attitudes-toward-the-single-checking-of-medications
#4
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/28437557/expression-of-catalase-alcohol-dehydrogenase-and-malate-dehydrogenase-in-rot-grains-upon-fungicide-use-on-maize-hybrids-grown-at-different-spacings
#5
E R Kluge, M C Mendes, M V Faria, H O Santos, L A Santos, I E Sandini
In this study, we evaluated the fungicide effect on the incidence of rot grains and expression of catalase (CAT), alcohol dehydrogenase (ADH), and malate dehydrogenase (MDH) enzymes in commercial maize hybrids grown with conventional and reduced spacing in Guarapuava, PR, Brazil. The experiment was designed in random blocks with a 3 × 8-factorial scheme, totaling 24 treatments. The first factor constituted three levels, the first with foliar fungicide application [150.0 g/L trifloxystrobin (15.0%, w/v) + 175...
April 20, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28437496/novel-solution-for-massive-glenoid-defects-in-shoulder-arthroplasty-a-patient-specific-glenoid-vault-reconstruction-system
#6
David M Dines, Lawrence Gulotta, Edward V Craig, Joshua S Dines
Complex glenoid deformities present the most difficult challenges in shoulder arthroplasty. These deformities may be caused by severe degenerative or congenital deformity, posttraumatic anatomy, tumor, or, in most cases, bone loss after glenoid failure in anatomical total shoulder arthroplasty. Methods of treating severe bone loss have included inlay and onlay bone-graft options with augmented fixation and, in severe cases, salvage hemiarthroplasty with limited goal expectations. Unfortunately, none of these methods has provided consistently satisfactory reproducible results...
March 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28437127/building-a-lego-wall-sequential-action-selection
#7
Amy Arnold, Alan M Wing, Pia Rotshtein
The present study draws together two distinct lines of enquiry into the selection and control of sequential action: motor sequence production and action selection in everyday tasks. Participants were asked to build 2 different Lego walls. The walls were designed to have hierarchical structures with shared and dissociated colors and spatial components. Participants built 1 wall at a time, under low and high load cognitive states. Selection times for correctly completed trials were measured using 3-dimensional motion tracking...
May 2017: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/28437094/rational-design-of-an-ultrasensitive-quorum-sensing-switch
#8
Weiqian Zeng, Pei Du, Qiuli Lou, Lili Wu, Haoqian M Zhang, Chunbo Lou, Hongli Wang, Qi Ouyang
One of the purposes of synthetic biology is to develop rational methods that accelerate the design of genetic circuits, saving time and effort spent on experiments and providing reliably predictable circuit performance. We applied a reverse engineering approach to design an ultrasensitive transcriptional quorum-sensing switch. We want to explore how systems biology can guide synthetic biology in the choice of specific DNA sequences and their regulatory relations to achieve a targeted function. The workflow comprises network enumeration that achieves the target function robustly, experimental restriction of the obtained candidate networks, global parameter optimization via mathematical analysis, selection and engineering of parts based on these calculations, and finally, circuit construction based on the principles of standardization and modularization...
April 24, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/28436903/robust-multiview-data-analysis-through-collective-low-rank-subspace
#9
Zhengming Ding, Yun Fu
Multiview data are of great abundance in real-world applications, since various viewpoints and multiple sensors desire to represent the data in a better way. Conventional multiview learning methods aimed to learn multiple view-specific transformations meanwhile assumed the view knowledge of training, and test data were available in advance. However, they would fail when we do not have any prior knowledge for the probe data's view information, since the correct view-specific projections cannot be utilized to extract effective feature representations...
April 17, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28436898/extended-polynomial-growth-transforms-for-design-and-training-of-generalized-support-vector-machines
#10
Ahana Gangopadhyay, Oindrila Chatterjee, Shantanu Chakrabartty
Growth transformations constitute a class of fixed-point multiplicative update algorithms that were originally proposed for optimizing polynomial and rational functions over a domain of probability measures. In this paper, we extend this framework to the domain of bounded real variables which can be applied towards optimizing the dual cost function of a generic support vector machine (SVM). The approach can, therefore, not only be used to train traditional soft-margin binary SVMs, one-class SVMs, and probabilistic SVMs but can also be used to design novel variants of SVMs with different types of convex and quasi-convex loss functions...
April 17, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28436889/design-and-implementation-of-a-tactile-stimulation-device-to-increase-auditory-discrimination
#11
Shahrzad Abbasi Baharanchi, Majid MohammadBeigi, Fatemeh Abnavi, Samira Tavakol
Reading is a complex process that requires various simultaneous brain processes. One of the most common types of reading disorders is developmental dyslexia, and one of the objectives of speech therapy sessions for children with developmental dyslexia is to increase their auditory discrimination. One of the most commonly used Auditory Discrimination Tests (ADTs) is Wepman's Auditory Discrimination Test (WADT). It includes minimal pair words categorized by characteristics of vowels and consonants. The goal of this research is to design and implement a tactile stimulation device based on Wepman's test to increase auditory discrimination in children with developmental dyslexia in therapy sessions, so that while playing each word for the children, vibrational cues are presented to their left palm and fingers...
April 24, 2017: IEEE Transactions on Haptics
https://www.readbyqxmd.com/read/28436872/hash-bit-selection-for-nearest-neighbor-search
#12
Xianglong Liu, Junfeng He, Shih-Fu Chang
To overcome the barrier of storage and computation when dealing with gigantic-scale data sets, compact hashing has been studied extensively to approximate nearest neighbor search. Despite the recent advances, critical design issues remain open in how to select the right features, hashing algorithms, and/or parameter settings. In this paper, we address these by posing an optimal hash bit selection problem, in which an optimal subset of hash bits are selected from a pool of candidate bits generated by different features, algorithms, or parameters...
April 19, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28436829/modelling-the-effect-of-combined-antimicrobials-a-base-model-for-multiple-hurdles
#13
M Anastasiadi, R J W Lambert
Combining antimicrobials to reduce microbial growth and to combat the potential impact of antimicrobial resistance is an important subject both in foods and in pharmaceutics. Modelling of combined treatments designed to reduce or eliminate microbial contamination in foods (microbiological predictive modelling) has become commonplace. Two main reference models are used to analyse mixtures: the Bliss Independence and the Loewe reference models (LRM). By using optical density to analyse the growth of Aeromonas hydrophila, Cronobacter sakazakii and Escherichia coli in combined NaCl/NaCl (a mock combination experiment) and combined NaCl/KCl experiments, previous models for combined antimicrobials in foods, based on the Bliss approach, were shown to be inconsistent and that models based on the LRM more applicable...
April 14, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28436813/rf-heating-of-gold-cup-and-conductive-plastic-electrodes-during-simultaneous-eeg-and-mri
#14
Mukund Balasubramanian, William M Wells, John R Ives, Patrick Britz, Robert V Mulkern, Darren B Orbach
PURPOSE: To investigate the heating of EEG electrodes during magnetic resonance imaging (MRI) scans and to better understand the underlying physical mechanisms with a focus on the antenna effect. MATERIALS AND METHODS: Gold cup and conductive plastic electrodes were placed on small watermelons with fiberoptic probes used to measure electrode temperature changes during a variety of 1.5T and 3T MRI scans. A subset of these experiments was repeated on a healthy human volunteer...
2017: Neurodiagnostic Journal
https://www.readbyqxmd.com/read/28436782/subverting-space-an-exploration-of-a-dance-therapy-workshop-apparatus-for-schizophrenics
#15
Silvia Lippi, Laetitia Petit
The authors created a dance workshop for schizophrenic patients designed to address their singular experience of space, in which the categories of interior and exterior do not function as limits. The space of the workshop, which, paradoxically, is thought in terms of the psychic space of schizophrenic patients by playing on its borderless quality, creates a continuity between the psychiatric hospital and the external world, and thus helps to prevent the segregation and isolation of such patients. This continuity is established on the basis of both the physical architecture of the workshop setting and the practice of dancing itself...
April 2017: Psychoanalytic Review
https://www.readbyqxmd.com/read/28436682/kinetics-biochemical-and-factorial-analysis-of-chromium-uptake-in-a-multi-ion-system-by-tradescantia-pallida-rose-d-r-hunt
#16
Vibha Sinha, Kannan Pakshirajan, N Arul Manikandan, Rakhi Chaturvedi
Effluent from electroplating and leather industries is a major concern for the environment due to the presence of chromium (Cr) and other ions, such as sulphate, nitrate, phosphate, etc., which needs to be regulated prior to its discharge into the environment. This study evaluated the potential of Tradescantia pallida, a plant species known for its Cr bioaccumulation, for the simultaneous removal of Cr(6+), SO4(2-), NO3(-) and PO4(3-). Different combination levels of Cr(6+) and the co-ions were planned as per the Plackett-Burman design of experiments performed using hydroponics system...
April 24, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28436652/observation-of-the-generation-of-onoo-in-mitochondria-under-various-stimuli-with-a-sensitive-fluorescence-probe
#17
Hongyu Li, Xiaohua Li, Xiaofeng Wu, Wen Shi, Huimin Ma
Peroxynitrite (ONOO-), an important reactive oxygen species (ROS), may be generated in the mitochondria under various physiological and pathological conditions. In this work, we designed and synthesized a mitochondria-targetable fluorescence probe RPTPP by using rhodamine as the fluorophore, phenylhydrazine as the recognition moiety, and triphenyl- phosphonium cation as the mitochondria-targeting moiety. Upon reaction of the probe with ONOO-, the oxidation of phenylhydrazine by ONOO- and the subsequent hydrolysis opens the non-fluorescent spirocyclic structure and thus triggers a fluorescence turn-on response, which provides a sensitive and selective method for the detection of ONOO-...
April 24, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28436648/statistical-variable-selection-an-alternative-prioritization-strategy-during-the-non-target-analysis-of-lc-hr-ms-data
#18
Saer Samanipour, Malcolm J Reid, Kevin V Thomas
Liquid chromatography coupled to high resolution mass spectrometry (LC-HR-MS) has been one of the main analytical tools for the analysis of small polar organic pollutants in the environment. LC-HR-MS typically produces a large amount of data for a single chromatogram. The analyst is therefore required to perform prioritization prior to non-target structural elucidation. In the present study we have combined the F-ratio statistical variable selection and the apex detection algorithms in order to perform prioritization in data sets produced via LC-HR-MS...
April 24, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28436407/design-of-a-pulsatile-dc-electromagnetic-blood-pump-for-ecmo
#19
Jingjing Liu, Bin Ge, Tong Lu
BACKGROUND: Extracorporeal membrane oxygenation (ECMO) has developed rapidly and become a significant treatment for emergency. Current blood pumps for ECMO have different disadvantages. OBJECTIVE: To design a pulsatile DC electromagnetic blood pump for ECMO. METHODS: The design is presented with a driving principle which the rectilinear reciprocation of a magnet inside energized solenoids is implemented, and with a structure of solenoids with compensation coils...
April 14, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/28436389/ethical-considerations-for-deep-brain-stimulation-trials-in-patients-with-early-onset-alzheimer-s-disease
#20
John Noel M Viaña, Merlin Bittlinger, Frederic Gilbert
Several studies of deep brain stimulation (DBS) of the fornix or the nucleus basalis of Meynert have been recently conducted in people with Alzheimer's disease, with several recruiting participants <65 and thus have early-onset Alzheimer's disease (EOAD). Although EOAD accounts for less than 5.5% of AD cases, ethical considerations must still be made when performing DBS trials including these participants since a portion of people with EOAD, especially those possessing autosomal-dominant mutations, have an atypical and more aggressive disease progression...
April 15, 2017: Journal of Alzheimer's Disease: JAD
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