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Anna J Watters, Anthony W F Harris, Leanne M Williams
Facial expressions signaling threat and mood-congruent loss have been used to probe abnormal neural reactivity in major depressive disorder (MDD) and may be implicated in genetic vulnerability to MDD. This study investigated electro-cortical reactivity to facial expressions 101 unaffected, adult first degree relatives of probands with MDD and non-relative controls (n = 101). We investigated event-related potentials (ERPs) to five facial expressions of basic emotion: fear, anger, disgust, sadness and happiness under both subliminal (masked) and conscious (unmasked) presentation conditions, and the source localization of group differences...
May 21, 2018: Biological Psychology
Kyoung-Ryul Lee, Sung Hwan Jang, Inhwa Jung
We investigated the acoustic performance of electrostatic sound-generating devices consisting of bilayer graphene on polyimide (PI) film. Total sound pressure level (SPL) of sound generated from the devices was measured as a function of source frequency by sweeping, and frequency spectra were measured at 1/3 octave band frequencies. The relationship between various operation conditions and total SPL was determined. In addition, the effects of changing voltage level, adding a DC offset, and using two pairs of electrodes were evaluated...
May 22, 2018: Nanotechnology
Daniel Zenteno, Aldo Bancalari, Ximena Navarro, Valentina Díaz, Iván Rodríguez-Núñez, Pablo Brockmann
INTRODUCTION: Night Continuous Saturometry (CSO2) is used in Neonatal Units to detect events of hypoxemia in Newborns (NB) with apnea episodes. Polygraphy (PG) has a larger number of measuring channels. Our goal was to evaluate the diagnostic performance of CSO2 compared to Polygra phy in NB with suspected sleep apneas. PATIENTS AND METHOD: Results of CSO2 and PG performed simultaneously in RN with suspected apneas were retrospectively analyzed over a three-year period...
December 2017: Revista Chilena de Pediatría
Shunsuke Takahashi, Kazuki Kishi, Ryota Hiraga, Kazuki Hayashi, Youhei Mamada, Masahiko Oshige, Shinji Katsura
Continued advancement of protein array, bioelectrode, and biosensor technologies is necessary to develop methods for higher amount and highly oriented immobilization activity of proteins. In pursuit of these goals, we developed a new immobilization method by combining electrostatic transport and subsequent molecular diffusion of protein molecules. Our developed immobilization method is based on a model that transports proteins toward the substrate surface due to steep concentration gradient generated by low-frequency AC electric field...
March 5, 2018: Sensors
Katie Groves, Steffan Kennett, Helge Gillmeister
Event-related potential (ERP) studies feature among the most cited papers in the field of body representation, with recent research highlighting the potential of ERPs as neuropsychiatric biomarkers. Despite this, investigation into how reliable early visual ERPs and body-sensitive effects are over time has been overlooked. This study therefore aimed to assess the stability of early body-sensitive effects and visual P1, N1 and VPP responses. Participants were asked to identify pictures of their own bodies, other bodies and houses during an EEG test session that was completed at the same time, once a week, for four consecutive weeks...
2018: PloS One
G H An, M Chen, W F Zhan, B Hu, H X Zhang
Objective: To explore the protective effect of electrical stimulation of phrenic nerve on diaphragmatic function during mechanical ventilation. Methods: Forty healthy adult SD rats were randomly divided into 5 groups: blank control group (BC), spontaneous breathing group (SB), electrical stimulation group (ES), mechanical ventilation group (MV), and electrical stimulation and mechanical ventilation group (MS). The rats in each group were treated for 18 h except for the BC group. After treatment, the diaphragm muscle tissue was obtained and the diaphragm contractility including peak-to-peak value(Vpp) and maximum rate of contraction(+ dT/dt max) were measured...
February 12, 2018: Chinese Journal of Tuberculosis and Respiratory Diseases
Ottilie von Loeffelholz, Gabor Papai, Radostin Danev, Alexander G Myasnikov, S Kundhavai Natchiar, Isabelle Hazemann, Jean-François Ménétret, Bruno P Klaholz
A current bottleneck in structure determination of macromolecular complexes by cryo electron microscopy (cryo-EM) is the large amount of data needed to obtain high-resolution 3D reconstructions, including through sorting into different conformations and compositions with advanced image processing. Additionally, it may be difficult to visualize small ligands that bind in sub-stoichiometric levels. Volta phase plates (VPP) introduce a phase shift in the contrast transfer and drastically increase the contrast of the recorded low-dose cryo-EM images while preserving high frequency information...
January 11, 2018: Journal of Structural Biology
S Wolf, H Zwickel, C Kieninger, M Lauermann, W Hartmann, Y Kutuvantavida, W Freude, S Randel, C Koos
We demonstrate the generation of higher-order modulation formats using silicon-based inphase/quadrature (IQ) modulators at symbol rates of up to 100 GBd. Our devices exploit the advantages of silicon-organic hybrid (SOH) integration, which combines silicon-on-insulator waveguides with highly efficient organic electro-optic (EO) cladding materials to enable small drive voltages and sub-millimeter device lengths. In our experiments, we use an SOH IQ modulator with a π-voltage of 1.6 V to generate 100 GBd 16QAM signals...
January 8, 2018: Optics Express
Asier Marzo, Tom Corkett, Bruce W Drinkwater
Modern ultrasonic phased-array controllers are electronic systems capable of delaying the transmitted or received signals of multiple transducers. Configurable transmit-receive array systems, capable of electronic steering and shaping of the beam in near real-time, are available commercially, for example, for medical imaging. However, emerging applications, such as ultrasonic haptics, parametric audio, or ultrasonic levitation, require only a small subset of the capabilities provided by the existing controllers...
January 2018: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Mohammad Javad Kasaei, Majid Gandomkar, Javad Nikoukar
Due to many environmental and economic influences, the application of Renewable Energy Sources (RESs) such as Photovoltaic (PV), Wind Turbine (WT), Fuel Cell (FC), and Micro Turbine (MT) have quickly been increased. The rapid growth of the RESs has provided both advantages and disadvantages for the power systems. In the side of advantages, lower environmental pollution, less power losses and better power quality and in the side of disadvantages, intermittent nature of RESs and higher uncertainties that cause the variable generation and uncertainty in distribution systems can be mentioned...
December 13, 2017: ISA Transactions
Sara Lospitao-Gómez, Tomás Sebastián-Viana, José M González-Ruíz, Joaquín Álvarez-Rodríguez
OBJECTIVE: The objective of this study was to evaluate the validity of risk detection scales EVARUCI and Norton-MI (modified by INSALUD) to detect critical adult patients with the risk of developing pressure ulcers (PU) in an intensive care unit (ICU). DESIGN: The authors have conducted a descriptive, prospective study at the ICU in their hospital from 2008 to 2014. The evaluations of both scales were registered daily by nurses from the unit. PATIENTS: Adult patients admitted into the ICU...
December 2017: Applied Nursing Research: ANR
Zheng Jiang, Liang Wang, Jiamei Jin
In this work, a novel robotic arm driven by sandwich piezoelectric transducers is proposed. The proposed robotic arm is composed of three arms and four joints. Each arm consists of a sandwich piezoelectric transducer and an H-shaped hollow frame. The sandwich piezoelectric transducer utilizes frictional force to drive the joints on its both sides to rotate simultaneously. The joint between two arms can be driven to rotate in two perpendicular directions by two sandwich piezoelectric transducers. The rotation of joints results in the arm motion...
March 2018: Ultrasonics
Sanghoon Park, Yura Kim, Hyosub Jung, Jun-Young Park, Naesung Lee, Yongho Seo
In this study, we investigated an energy harvesting effect of tensile stress using piezoelectric polymers and flexible electrodes. A chemical-vapor-deposition grown graphene film was transferred onto both sides of the PVDF and P(VDF-TrFE) films simultaneously by means of a conventional wet chemical method. Output voltage induced by sound waves was measured and analyzed when a mechanical tension was applied to the device. Another energy harvester was made with a metallic electrode, where Al and Ag were deposited by using an electron-beam evaporator...
December 11, 2017: Scientific Reports
S H Shah, A Goel, Vpp Selvakumar, S Garg, K Siddiqui, K Kumar
BACKGROUND: Surgical treatment for lung cancer has evolved from pneumonectomy to lobectomy/sleeve resection around the world. Although condemned for poor outcomes, pneumonectomy may still be required in a select group of patients in developing countries. With the better patient selection, optimization of medical comorbidities, better perioperative care; pneumonectomy may show better results. Thus, there is a need to reconsider the role of pneumonectomy in patients with locally advanced lung cancer in the current scenario...
January 2017: Indian Journal of Cancer
Gangqiang Wang, Chaodong Li, Tao Yuan
We describe the design and control of a four legged walking robot, 45 g in weight and 130 mm × 105 mm × 25 mm in size. Each leg consists of two piezoelectric bimorph actuators that are bonded at the free end by a flexure and an end-effector. The robot generates stick-slip locomotion when applying sawtooth shaped voltage signals. Friction between legs and a contact surface is analyzed by using the Coulomb friction model. Locomotion characteristics are measured in several experiments. The robot was driven with frequencies up to 75 Hz, and a maximum velocity of 65 mm/s was obtained at two frequencies: 45 Hz with 190 Vpp driving voltage and 60 Hz with 170 Vpp driving voltage, respectively...
November 2017: Review of Scientific Instruments
Haytham Derbel, Hicham Kobeiter, Guillaume Pizaine, Fourat Ridouani, Alain Luciani, Alessandro Radaelli, William Van der Sterren, Mélanie Chiaradia, Vania Tacher
PURPOSE: To evaluate accuracy of virtual parenchymal perfusion (VPP) algorithm developed for targeting liver cancer during intra-arterial therapy (IAT) using cone-beam CT guidance. MATERIALS AND METHODS: VPP was retrospectively applied to 15 patients who underwent IAT for liver cancer. Virtual territory (VT) was estimated after positioning a virtual injection point on nonselective dual-phase (DP) cone-beam CT images acquired during hepatic arteriography at the same position chosen for selective treatment...
February 2018: Journal of Vascular and Interventional Radiology: JVIR
Juan Carlos Serra Varela, Evi Pecceu, Ian Handel, Jessica Lawrence
Optimal chemotherapy protocols for high-risk mast cell tumours (MCTs) are unknown. The purpose of this study was to determine the tolerability and toxicity profile of a rapidly escalating vinblastine and prednisolone protocol (VPP) in which 3.00 mg/m2 was administered once 7 days apart: at day 14 and at day 21. Dogs with chemotherapy-naïve MCTs presenting to the Oncology Service of a single institution were prospectively enrolled to receive escalating vinblastine, and haematology and a standardised quality-of-life questionnaire were assessed prior to each dosage...
November 2016: Veterinary Medicine and Science
Chun-Hao Huang, Kin Fong Lei
In vitro cell culture device was developed for the investigation of inhibition effect of cell colonies using alternating electric field. Cancer cells were cultured in 3D hydrogel and cell colonies, or called tumor spheroids, were gradually formed in the culture device. During the culture course, alternating electric field was applied and the conditions were investigated to optimize the inhibition effect of cell colonies. Results showed that electric field at frequency of 130 kHz and 0.5 Vpp was the minimal effective conditions of the inhibition of cell colonies...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Hidetoshi Miyazaki, Teppei Nakamura, Kohji Ohki, Katsuya Nagai
The bioactive peptides Ile-Pro-Pro (IPP) and Val-Pro-Pro (VPP) are believed to improve blood pressure and arterial function. To gain a better understanding of the mechanisms underlying the action of these peptides, we investigated their effects upon autonomic neurotransmission and blood pressure in spontaneously hypertensive rats (SHR). Both IPP and VPP caused a significant reduction in cutaneous arterial sympathetic nerve activity (CASNA) and reduced mean arterial pressure (MAP); however, both of these effects were eliminated following sub-diaphragmatic vagotomy...
December 2017: Autonomic Neuroscience: Basic & Clinical
M Ali Fadel, Reem H El-Gebaly, Shaimaa A Mohamed, Ashraf M M Abdelbacki
Isolated Agrobacterium tumefaciens was exposed to different extremely low frequencies of square amplitude modulated waves (QAMW) from two generators to determine the resonance frequency that causes growth inhibition. The carrier was 10 MHz sine wave with amplitude ±10 Vpp which was modulated by a second wave generator with a modulation depth of ± 2Vpp and constant field strength of 200 V/m at 28 °C. The exposure of A. tumefaciens to 1.0 Hz QAMW for 90 min inhibited the bacterial growth by 49.2%. In addition, the tested antibiotics became more effective against A...
December 9, 2017: Biochemical and Biophysical Research Communications
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