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https://www.readbyqxmd.com/read/27910694/mhd-marking-using-the-mse-polarimeter-optics-in-ilw-jet-plasmas
#1
S Reyes Cortes, B Alper, D Alves, M Baruzzo, J Bernardo, P Buratti, R Coelho, C Challis, I Chapman, N Hawkes, T C Hender, J Hobirk, E Joffrin
In this communication we propose a novel diagnostic technique, which uses the collection optics of the JET Motional Stark Effect (MSE) diagnostic, to perform polarimetry marking of observed MHD in high temperature plasma regimes. To introduce the technique, first we will present measurements of the coherence between MSE polarimeter, electron cyclotron emission, and Mirnov coil signals aiming to show the feasibility of the method. The next step consists of measuring the amplitude fluctuation of the raw MSE polarimeter signals, for each MSE channel, following carefully the MHD frequency on Mirnov coil data spectrograms...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910352/jet-outflow-and-open-field-line-measurements-on-the-c-2u-advanced-beam-driven-field-reversed-configuration-plasma-experiment
#2
D Sheftman, D Gupta, T Roche, M C Thompson, F Giammanco, F Conti, P Marsili, C D Moreno
Knowledge and control of the axial outflow of plasma particles and energy along open-magnetic-field lines are of crucial importance to the stability and longevity of the advanced beam-driven field-reversed configuration plasma. An overview of the diagnostic methods used to perform measurements on the open field line plasma on C-2U is presented, including passive Doppler impurity spectroscopy, microwave interferometry, and triple Langmuir probe measurements. Results of these measurements provide the jet ion temperature and axial velocity, electron density, and high frequency density fluctuations...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910336/high-intensity-laser-accelerated-ion-beam-produced-from-cryogenic-micro-jet-target
#3
M Gauthier, J B Kim, C B Curry, B Aurand, E J Gamboa, S Göde, C Goyon, A Hazi, S Kerr, A Pak, A Propp, B Ramakrishna, J Ruby, O Willi, G J Williams, C Rödel, S H Glenzer
We report on the successful operation of a newly developed cryogenic jet target at high intensity laser-irradiation. Using the frequency-doubled Titan short pulse laser system at Jupiter Laser Facility, Lawrence Livermore National Laboratory, we demonstrate the generation of a pure proton beam a with maximum energy of 2 MeV. Furthermore, we record a quasi-monoenergetic peak at 1.1 MeV in the proton spectrum emitted in the laser forward direction suggesting an alternative acceleration mechanism. Using a solid-density mixed hydrogen-deuterium target, we are also able to produce pure proton-deuteron ion beams...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27901052/pacific-ocean-decadal-forcing-of-long-term-changes-in-the-western-pacific-subtropical-high
#4
Shinji Matsumura, Takeshi Horinouchi
The western Pacific subtropical high (WPSH) has a significant effect on droughts, heat waves, and tropical cyclone tracks over East Asia and the northwest Pacific. The WPSH has intensified during the past three decades, but its causes are not yet well understood. Here we show that the Pacific Decadal Oscillation (PDO) is responsible for the long-term changes in the WPSH through the meridional shift of the subtropical jet, based on comprehensive data analysis and model results. El Niño-Southern Oscillation (ENSO) is the leading forcing of WPSH variability over interannual timescales, whereas the PDO accounts for its low-frequency variability, resulting in it being independent of ENSO with regard to WPSH variability...
November 30, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27847813/jet-ventilation-during-rigid-bronchoscopy-in-adults-a-focused-review
#5
REVIEW
Laurie Putz, Alain Mayné, Anne-Sophie Dincq
The indications for rigid bronchoscopy for interventional pulmonology have increased and include stent placements and transbronchial cryobiopsy procedures. The shared airway between anesthesiologist and pulmonologist and the open airway system, requiring specific ventilation techniques such as jet ventilation, need a good understanding of the procedure to reduce potentially harmful complications. Appropriate adjustment of the ventilator settings including pause pressure and peak inspiratory pressure reduces the risk of barotrauma...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27825225/five-intermolecular-vibrations-of-the-co2-dimer-observed-via-infrared-combination-bands
#6
J Norooz Oliaee, M Dehghany, Mojtaba Rezaei, A R W McKellar, N Moazzen-Ahmadi
The weakly bound van der Waals dimer (CO2)2 has long been of considerable theoretical and experimental interest. Here, we study its low frequency intermolecular vibrations by means of combination bands in the region of the CO2 monomer ν3 fundamental (≈2350 cm(-1)), which are observed using a tunable infrared laser to probe a pulsed supersonic slit jet expansion. With the help of a recent high level ab initio calculation by Wang, Carrington, and Dawes, four intermolecular frequencies are assigned: the in-plane disrotatory bend (22...
November 7, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27824560/assessing-the-performance-of-ultrafast-vector-flow-imaging-in-the-neonatal-heart-via-multiphysics-modeling-and-in-vitro-experiments
#7
Joris Van Cauwenberge, Lasse Lovstakken, Solveig Fadnes, Alfonso Rodriguez-Morales, Jan Vierendeels, Patrick Segers, Abigail Swillens
Ultrafast vector flow imaging would benefit newborn patients with congenital heart disorders, but still requires thorough validation before translation to clinical practice. This paper investigates 2-D speckle tracking (ST) of intraventricular blood flow in neonates when transmitting diverging waves at ultrafast frame rate. Computational and in vitro studies enabled us to quantify the performance and identify artifacts related to the flow and the imaging sequence. First, synthetic ultrasound images of a neonate's left ventricular flow pattern were obtained with the ultrasound simulator Field II by propagating point scatterers according to 3-D intraventricular flow fields obtained with computational fluid dynamics (CFD)...
November 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/27802692/stable-droplet-generator-for-a-high-brightness-laser-produced-plasma-extreme-ultraviolet-source
#8
A Vinokhodov, M Krivokorytov, Yu Sidelnikov, V Krivtsun, V Medvedev, V Bushuev, K Koshelev, D Glushkov, S Ellwi
We present the results of the low-melting liquid metal droplets generation based on excited Rayleigh jet breakup. We discuss on the operation of the industrial and in-house designed and manufactured dispensing devices for the droplets generation. Droplet diameter can be varied in the range of 30-90 μm. The working frequency of the droplets, velocity, and the operating temperature were in the ranges of 20-150 kHz, 4-15 m/s, and up to 250 °C, respectively. The standard deviations for the droplet center of mass position both their diameter σ < 1 μm at the distance of 45 mm from the nozzle...
October 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27762601/stereotactic-ct-guided-percutaneous-microwave-ablation-of-liver-tumors-with-the-use-of-high-frequency-jet-ventilation-an-accuracy-and-procedural-safety-study
#9
Jennie Engstrand, Grzegorz Toporek, Piotr Harbut, Eduard Jonas, Henrik Nilsson, Jacob Freedman
OBJECTIVE: The purpose of the present study is to evaluate the accuracy and safety of antenna placement performed with the use of a CT-guided stereotactic navigation system for percutaneous ablation of liver tumors and to assess the safety of high-frequency jet ventilation for target motion control. MATERIALS AND METHODS: Twenty consecutive patients with malignant liver lesions for which surgical resection was contraindicated or that were not readily visible on ultrasound or not accessible by ultrasound guidance were included in the study...
October 20, 2016: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/27721758/navigated-percutaneous-lung-ablation-under-high-frequency-jet-ventilation-of-a-metastasis-from-a-wilms-tumour-a-paediatric-case-report
#10
Jacob Freedman, Piotr Harbut
This is a case report of microwave energy being used to ablate an inoperable metastasis of a Wilms' tumour in a 6-year-old boy using state-of-the-art navigated computed tomography targeting and high-frequency jet ventilation to reduce organ displacement and the potential risk of procedure-related pneumothorax. After the ablation, the young boy had high-dose chemotherapy followed by an autologous stem cell transplantation with rapid reduction of three recurrent right-sided lung metastases.
May 2016: Case Reports in Oncology
https://www.readbyqxmd.com/read/27672454/bronchoesophageal-fistula-stenting-using-high-frequency-jet-ventilation-and-underwater-seal-gastrostomy-tube-drainage
#11
Nitish Fokeerah, Xinwei Liu, Yonggang Hao, Lihua Peng
Managing a patient scheduled for bronchoesophageal fistula repair is challenging for the anesthetist. If appropriate ventilation strategy is not employed, serious complications such as hypoxemia, gastric distension, and pulmonary aspiration can occur. We present the case of a 62-year-old man with a bronchoesophageal fistula in the left main stem bronchus requiring the insertion of a Y-shaped tracheobronchial stent through a rigid bronchoscope, under general anesthesia. We successfully managed this intervention and herein report this case to demonstrate the effectiveness of underwater seal gastrostomy tube drainage used in conjunction with high-frequency jet ventilation during bronchoesophageal fistula stenting...
2016: Case Reports in Anesthesiology
https://www.readbyqxmd.com/read/27634262/far-infrared-amide-iv-vi-spectroscopy-of-isolated-2-and-4-methylacetanilide
#12
Vasyl Yatsyna, Daniël J Bakker, Raimund Feifel, Anouk M Rijs, Vitali Zhaunerchyk
Delocalized molecular vibrations in the far-infrared and THz ranges are highly sensitive to the molecular structure, as well as to intra- and inter-molecular interactions. Thus, spectroscopic studies of biomolecular structures can greatly benefit from an extension of the conventional mid-infrared to the far-infrared wavelength range. In this work, the conformer-specific gas-phase far-infrared spectra of two aromatic molecules containing the peptide -CO-NH- link, namely, 2- and 4-Methylacetanilide, are investigated...
September 14, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27626028/high-frequency-jet-ventilation-in-respiratory-failure-secondary-to-respiratory-syncytial-virus-infection-a-case-series
#13
Kevin M Valentine, Ajit A Sarnaik, Hitesh S Sandhu, Ashok P Sarnaik
OBJECTIVE: To describe the utility of high frequency jet ventilation (HFJV) as a rescue therapy in patients with respiratory failure secondary to respiratory syncytial virus (RSV) that was refractory to conventional mechanical ventilation (CMV). DESIGN: Descriptive study by retrospective review. SETTING: Pediatric intensive care unit at a tertiary care children's hospital. PATIENTS: Infants on mechanical ventilation for respiratory failure due to RSV...
2016: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/27555171/elective-use-of-the-ventrain-for-upper-airway-obstruction-during-high-frequency-jet-ventilation
#14
Robert A Fearnley, Sheela Badiger, Richard J Oakley, Imran Ahmad
The safety of high pressure source ventilation (jet ventilation) is dependent upon upper airway patency to facilitate adequate passive expiration and prevent increasing intrathoracic pressure and its associated deleterious sequelae. Distortions in airway anatomy may make passive expiration inadequate or impossible in some patients. We report the elective use of the Ventrain device to provide ventilation in a clinical setting of upper airway obstruction in a patient with post radiation fibrosis that had previously prevented passive expiration during attempted high pressure source ventilation...
September 2016: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/27529870/assessing-the-performance-of-ultrafast-vector-flow-imaging-in-the-neonatal-heart-via-multiphysics-modeling-and-in-vitro-experiments
#15
Joris Van Cauwenberge, Lasse Lovstakken, Solveig Fadnes, Alfonso Rodriguez-Molares, Jan Vierendeels, Patrick Segers, Abigail Swillens
Ultrafast vector flow imaging would benefit newborn patients with congenital heart disorders, but still requires thorough validation before translation to clinical practice. This study investigates 2D speckle tracking of intraventricular blood flow in neonates when transmitting diverging waves at ultrafast frame rate. Computational and in-vitro studies enabled us to quantify the performance and identify artefacts related to the flow and the imaging sequence. First, synthetic ultrasound images of a neonate's left ventricular flow pattern were obtained with the ultrasound simulator Field II by propagating point scatterers according to 3D intraventricular flow fields obtained with computational fluid dynamics (CFD)...
August 1, 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/27475358/high-resolution-spectroscopy-of-jet-cooled-phenyl-radical-the-%C3%AE-1-and-%C3%AE-2-a1-symmetry-c-h-stretching-modes
#16
Chih-Hsuan Chang, David J Nesbitt
A series of CH stretch modes in phenyl radical (C6H5) has been investigated via high resolution infrared spectroscopy at sub-Doppler resolution (∼60 MHz) in a supersonic discharge slit jet expansion. Two fundamental vibrations of a1 symmetry, ν1 and ν2, are observed and rotationally analyzed for the first time, corresponding to in-phase and out-of-phase symmetric CH stretch excitation at the ortho/meta/para and ortho/para C atoms with respect to the radical center. The ν1 and ν2 band origins are determined to be 3073...
July 28, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27443743/absence-of-21st-century-warming-on-antarctic-peninsula-consistent-with-natural-variability
#17
John Turner, Hua Lu, Ian White, John C King, Tony Phillips, J Scott Hosking, Thomas J Bracegirdle, Gareth J Marshall, Robert Mulvaney, Pranab Deb
Since the 1950s, research stations on the Antarctic Peninsula have recorded some of the largest increases in near-surface air temperature in the Southern Hemisphere. This warming has contributed to the regional retreat of glaciers, disintegration of floating ice shelves and a 'greening' through the expansion in range of various flora. Several interlinked processes have been suggested as contributing to the warming, including stratospheric ozone depletion, local sea-ice loss, an increase in westerly winds, and changes in the strength and location of low-high-latitude atmospheric teleconnections...
July 21, 2016: Nature
https://www.readbyqxmd.com/read/27383714/utilizing-the-micron-sized-non-thermal-atmospheric-pressure-plasma-inside-the-animal-body-for-the-tumor-treatment-application
#18
Shahriar Mirpour, Somayeh Piroozmand, Neda Soleimani, Neda Jalali Faharani, Hamidreza Ghomi, Hoda Fotovat Eskandari, Ali Mohammad Sharifi, Sahar Mirpour, Mohammad Eftekhari, Maryam Nikkhah
This study aimed to evaluate the effects of micron sized non-thermal atmospheric pressure plasma inside the animal body on breast cancer tumor. The μ-plasma jet consists of micron sized hollow tube in which pure helium gas is ionized by high voltage (4 kV) and high frequency (6 kHz). The efficiency of the plasma treatment in killing cancer cells was first investigated by cell viability measurements of treated 4T1 cells using flow cytometry and cell cycle analysis. For exploration of the in vivo effects of the plasma treatment, the BALB/c mice inoculated by 4T1 cell lines were exposed subcutaneously to plasma for 3 minutes...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27375826/ac-electrified-jets-in-a-flow-focusing-device-jet-length-scaling
#19
Elena Castro-Hernández, Pablo García-Sánchez, Javier Alzaga-Gimeno, Say Hwa Tan, Jean-Christophe Baret, Antonio Ramos
We use a microfluidic flow-focusing device with integrated electrodes for controlling the production of water-in-oil drops. In a previous work, we reported that very long jets can be formed upon application of AC fields. We now study in detail the appearance of the long jets as a function of the electrical parameters, i.e., water conductivity, signal frequency, and voltage amplitude. For intermediate frequencies, we find a threshold voltage above which the jet length rapidly increases. Interestingly, this abrupt transition vanishes for high frequencies of the signal and the jet length grows smoothly with voltage...
July 2016: Biomicrofluidics
https://www.readbyqxmd.com/read/27359233/-sufficient-high-frequency-jet-ventilation-during-a-period-of-2-5%C3%A2-h-airway-management-during-resection-of-a-tracheaesophageal-fistula-and-tracheal-resection
#20
Sandra Kampe, Miguel Rocha, Kaid Darwiche, Uwe Ebmeyer, Stamatis Georgios
We present a 54 year old female patient who had undergone a Ross procedure in 2009, and in 2013 again a replacement of the aortic root and arch with bioprothetic material and homograft replacement of the pulmonalis walve. Postoperatively the patient had experienced a functional compromising tracheal stenosis and a persistent esophago-tracheal fistula. Endoscopic attempts to close the fistula were not successful, and the fistula was "bridged" with an endoscopically positioned tracheal stent.We report the anaesthesiological management during the open surgical repair of the esophago-tracheal fistula and resection of 2 tracheal rings with high frequency jet ventilation over a period of 2...
June 2016: Anästhesiologie, Intensivmedizin, Notfallmedizin, Schmerztherapie: AINS
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