Diagnostics and modeling in a pure argon plasma: Energy balance study

1999 ◽  
Vol 17 (1) ◽  
pp. 125-132 ◽  
Author(s):  
U. M. Kelkar ◽  
M. H. Gordon ◽  
L. A. Roe ◽  
Y. Li
Keyword(s):  
Energy Balance ◽  
Argon Plasma ◽  
Balance Study ◽  
Pure Argon ◽  
Plasma Energy

Diagnostics and modeling in a pure argon plasma - Energy balance study

1997 ◽  
Author(s):  
U. Kelkar ◽  
M. Gordon ◽  
L. Roe ◽  
Y. Li ◽  
U. Kelkar ◽  
...  
Keyword(s):  
Energy Balance ◽  
Argon Plasma ◽  
Balance Study ◽  
Pure Argon ◽  
Plasma Energy

Lung Decortication With Argon Plasma Energy for the Treatment of Chronic Pleural Empyema

2021 ◽  
pp. 155698452110111
Author(s):  
Savvas Lampridis ◽  
Sofoklis Mitsos ◽  
David R. Lawrence ◽  
Nikolaos Panagiotopoulos
Keyword(s):  
Energy Source ◽  
Surgical Management ◽  
Argon Plasma ◽  
Pleural Empyema ◽  
Controlled Trials ◽  
Air Leak ◽  
Pulmonary Tissue ◽  
Pure Argon ◽  
Plasma Energy ◽  
Minimal Depth

Lung decortication for the treatment of chronic pleural empyema remains a technically challenging procedure that is associated with bleeding and air leak. The recent advent of pure argon plasma has provided thoracic surgeons with an electrically neutral energy source for dissection and coagulation of pulmonary tissue with minimal depth of necrosis. In this article, we describe the technique of lung decortication with argon plasma energy (PlasmaJet, Plasma Surgical, Roswell, GA, USA) for the treatment of chronic pleural empyema. With appropriate application, the PlasmaJet can facilitate the removal of fibrous cortex with satisfactory hemostasis and aerostasis. Argon plasma energy can potentially be a useful adjunct in lung decortication. Controlled trials are needed to determine its role in the surgical management of advanced pleural empyema.

scholarly journals Energy Balance Study of Combined Carbonization and Liquefaction of Coconut Shell

2018 ◽  
Vol 7 (09) ◽  
pp. 2238-2247
Author(s):  
Joshi Priyanka Suhas ◽  
Khot Samreen Anwarali ◽  
A.G. Mohod ◽  
Y.P. Khandetod
Keyword(s):  
Energy Balance ◽  
Coconut Shell ◽  
Balance Study

scholarly journals A New Cold Plasma Jet: Performance Evaluation of Cold Plasma, Hybrid Plasma and Argon Plasma Coagulation

Plasma ◽  
2018 ◽  
Vol 1 (1) ◽  
pp. 189-200 ◽  
Author(s):  
Lawan Ly ◽  
Sterlyn Jones ◽  
Alexey Shashurin ◽  
Taisen Zhuang ◽  
Warren Rowe ◽  
...  
Keyword(s):  
Cold Plasma ◽  
Ex Vivo ◽  
Argon Plasma Coagulation ◽  
Tumor Resection ◽  
Argon Plasma ◽  
Plasma Jet ◽  
Atmospheric Plasma ◽  
Tissue Temperature ◽  
Plasma Coagulation ◽  
Plasma Energy

The use of plasma energy has expanded in surgery and medicine. Tumor resection in surgery and endoscopy has incorporated the use of a plasma scalpel or catheter for over four decades. A new plasma energy has expanded the tools in surgery: Cold Atmospheric Plasma (CAP). A cold plasma generator and handpiece are required to deliver the CAP energy. The authors evaluated a new Cold Plasma Jet System. The Cold Plasma Jet System consists of a USMI Cold Plasma Conversion Unit, Canady Helios Cold Plasma® Scalpel, and the Canady Plasma® Scalpel in Hybrid and Argon Plasma Coagulation (APC) modes. This plasma surgical system is designed to remove the target tumor with minimal blood loss and subsequently spray the local area with cold plasma. In this study, various operational parameters of the Canady Plasma® Scalpels were tested on ex vivo normal porcine liver tissue. These conditions included various gas flow rates (1.0, 3.0, 5.0 L/min), powers (20, 40, 60 P), and treatment durations (30, 60, 90, 120 s) with argon and helium gases. Plasma length, tissue temperature changes, and depth and eschar injury magnitude measurements resulting from treatment were taken into consideration in the comparison of the scalpels. The authors report that a new cold plasma jet technology does not produce any thermal damage to normal tissue.

scholarly journals HERschel Observations of Edge-on Spirals (HEROES)

2018 ◽  
Vol 616 ◽  
pp. A120 ◽  
Author(s):  
Aleksandr V. Mosenkov ◽  
Flor Allaert ◽  
Maarten Baes ◽  
Simone Bianchi ◽  
Peter Camps ◽  
...  
Keyword(s):  
Energy Balance ◽  
Near Infrared ◽  
Complex Geometry ◽  
Dust Emission ◽  
Three Dimensional ◽  
Stellar Model ◽  
Small Scale ◽  
Balance Study ◽  
Balance Problem ◽  
Double Exponential

We present results of the detailed dust energy balance study for the seven large edge-on galaxies in the HEROES sample using three-dimensional (3D) radiative transfer (RT) modelling. Based on available optical and near-infrared (NIR) observations of the HEROES galaxies, we derive the 3D distribution of stars and dust in these galaxies. For the sake of uniformity, we apply the same technique to retrieve galaxy properties for the entire sample: we use a stellar model consisting of a Sérsic bulge and three double-exponential discs (a superthin disc for a young stellar population and thin and thick discs for old populations). For the dust component, we adopt a double-exponential disc with the new THEMIS dust-grain model. We fit oligochromatic RT models to the optical and NIR images with the fitting algorithm FITSKIRT and run panchromatic simulations with the SKIRT code at wavelengths ranging from ultraviolet to submillimeter. We confirm the previously stated dust energy balance problem in galaxies: for the HEROES galaxies, the dust emission derived from our RT calculations underestimates the real observations by a factor 1.5–4 for all galaxies except NGC 973 and NGC 5907 (apparently, the latter galaxy has a more complex geometry than we used). The comparison between our RT simulations and the observations at mid-infrared–submillimetre wavelengths shows that most of our galaxies exhibit complex dust morphologies (possible spiral arms, star-forming regions, more extended dust structure in the radial and vertical directions). We suggest that, in agreement with results from the literature, the large- and small-scale structure is the most probable explanation for the dust energy balance problem.

The Energy Balance Study: The Design and Baseline Results for a Longitudinal Study of Energy Balance

2013 ◽  
Vol 84 (3) ◽  
pp. 275-286 ◽  
Author(s):  
Gregory A. Hand ◽  
Robin P. Shook ◽  
Amanda E. Paluch ◽  
Meghan Baruth ◽  
E. Patrick Crowley ◽  
...  
Keyword(s):  
Longitudinal Study ◽  
Energy Balance ◽  
Balance Study

Use of doubly labeled water technique in soldiers training for jungle warfare

1989 ◽  
Vol 67 (1) ◽  
pp. 14-18 ◽  
Author(s):  
C. H. Forbes-Ewan ◽  
B. L. Morrissey ◽  
G. C. Gregg ◽  
D. R. Waters
Keyword(s):  
Energy Balance ◽  
Food Intake ◽  
Energy Expenditure ◽  
Daily Intake ◽  
Doubly Labeled Water ◽  
Daily Energy Expenditure ◽  
Balance Study ◽  
Wide Range ◽  
Daily Energy ◽  
Doubly Labeled Water Method

The doubly labeled water method was used to estimate the energy expended by four members of an Australian Army platoon (34 soldiers) engaged in training for jungle warfare. Each subject received an oral isotope dose sufficient to raise isotope levels by 200–250 (18O) and 100–120 ppm (2H). The experimental period was 7 days. Concurrently, a factorial estimate of the energy expenditure of the platoon was conducted. Also, a food intake-energy balance study was conducted for the platoon. Mean daily energy expenditure by the doubly labeled water method was 4,750 kcal (range 4,152–5,394 kcal). The factorial estimate of mean daily energy expenditure was 4,535 kcal. Because of inherent inaccuracies in the food intake-energy balance technique, we were able to conclude only that energy expenditure, as measured by this method, was greater than the estimated mean daily intake of 4,040 kcal. The doubly labeled water technique was well tolerated, is noninvasive, and appears to be suitable in a wide range of field applications.

scholarly journals Dust energy balance study of two edge-on spiral galaxies in the Herschel-ATLAS survey

2015 ◽  
Vol 451 (2) ◽  
pp. 1728-1739 ◽  
Author(s):  
Gert De Geyter ◽  
Maarten Baes ◽  
Ilse De Looze ◽  
George J. Bendo ◽  
Nathan Bourne ◽  
...  
Keyword(s):  
Energy Balance ◽  
Spiral Galaxies ◽  
Balance Study

Optimizing large-eddy simulations for investigating the energy-balance closure problem at typical flux measurement heights

2020 ◽  
Author(s):  
Luise Wanner ◽  
Frederik De Roo ◽  
Matthias Mauder
Keyword(s):  
Energy Balance ◽  
Eddy Covariance ◽  
Surface Fluxes ◽  
Heat Fluxes ◽  
Large Eddy Simulations ◽  
Scale Model ◽  
Energy Balance Closure ◽  
Balance Study ◽  
Large Eddy ◽  
Secondary Circulations

<p>The eddy-covariance method generally underestimates sensible and latent heat fluxes, resulting in an energy-balance gap from 10 % to even 30 % across sites worldwide. In contrast to single-tower eddy-covariance measurements, large-eddy simulations (LES) provide information on a 3D array of grid points and can capture atmospheric processes such as secondary circulations on all relevant scales, which makes them a powerful tool to investigate this problem. In order to compare LES results to field measurements at 20 m height from the CHEESEHEAD (Chequamegon Heterogeneous Ecosystem Energy-balance Study Enabled by a High-density Extensive Array of Detectors) campaign, a LES-setup that provides comparability to the measurements at these low levels is necessary. However, former LES studies have shown that the energy balance is almost closed near the surface, which does not reflect the energy-balance gap in measurements. One possible reason might be the common use of prescribed surface fluxes that cannot adapt to changes in surface temperature and moisture, which would allow for the self-reinforcement of secondary circulations. Therefore, we set up an idealized study, in which we compare the performance of the land-surface and plant-canopy models implemented in PALM to the use of prescribed surface fluxes above homogeneous forest and grassland ecosystems under different atmospheric conditions with respect to realistic energy-balance closure behavior. Furthermore, we evaluate the performance of a dynamic subgrid-scale model, as well as an alternative to the Monin-Obukhov similarity theory (Banerjee et al. 2015, Q. J. R. Met. Soc.).</p>

Sign in / Sign up

Export Citation Format

Share Document