scholarly journals Radiation transport and scaling of optical depth in Nd:YAG laser-produced microdroplet-tin plasma

2019 ◽  
Vol 115 (12) ◽  
pp. 124101 ◽  
Author(s):  
R. Schupp ◽  
F. Torretti ◽  
R. A. Meijer ◽  
M. Bayraktar ◽  
J. Sheil ◽  
...  
Keyword(s):  
Optical Depth ◽  
Nd:Yag Laser ◽  
Radiation Transport ◽  
Tin Plasma

scholarly journals Climatology of the aerosol optical depth by components from the Multiangle Imaging SpectroRadiometer (MISR) and a high-resolution chemistry transport model

2015 ◽  
Vol 15 (23) ◽  
pp. 33897-33929 ◽  
Author(s):  
H. Lee ◽  
O. V. Kalashnikova ◽  
K. Suzuki ◽  
A. Braverman ◽  
M. J. Garay ◽  
...  
Keyword(s):  
Aerosol Optical Depth ◽  
Optical Depth ◽  
Transport Model ◽  
Radiation Transport ◽  
Spectral Radiation ◽  
Chemistry Transport Model ◽  
Source Regions ◽  
Level 3 ◽  
Level 2 ◽  
Aerosol Type

Abstract. The Multi-angle Imaging SpectroRadiometer (MISR) Joint Aerosol (JOINT_AS) Level 3 product provides a global, descriptive summary of MISR Level 2 aerosol optical depth (AOD) and aerosol type information for each month between March 2000 and the present. Using Version 1 of JOINT_AS, which is based on the operational (Version 22) MISR Level 2 aerosol product, this study analyzes, for the first time, characteristics of observed and simulated distributions of AOD for three broad classes of aerosols: non-absorbing, absorbing, and non-spherical – near or downwind of their major source regions. The statistical moments (means, standard deviations, and skewnesses) and distributions of AOD by components derived from the JOINT_AS are compared with results from the SPectral RadIatioN-TrAnSport (SPRINTARS) model, a chemistry transport model (CTM) with very high spatial and temporal resolution. Overall, the AOD distributions of combined MISR aerosol types show good agreement with those from SPRINTARS. Marginal distributions of AOD for each aerosol type in both MISR and SPRINTARS show considerable high positive skewness, which indicates the importance of including extreme AOD events when comparing satellite retrievals with models. The MISR JOINT_AS product will greatly facilitate comparisons between satellite observations and model simulations of aerosols by type.

scholarly journals Climatology of the aerosol optical depth by components from the Multi-angle Imaging SpectroRadiometer (MISR) and chemistry transport models

2016 ◽  
Vol 16 (10) ◽  
pp. 6627-6640 ◽  
Author(s):  
Huikyo Lee ◽  
Olga V. Kalashnikova ◽  
Kentaroh Suzuki ◽  
Amy Braverman ◽  
Michael J. Garay ◽  
...  
Keyword(s):  
Aerosol Optical Depth ◽  
Optical Depth ◽  
Radiation Transport ◽  
Spectral Radiation ◽  
Transport Models ◽  
Source Regions ◽  
Level 3 ◽  
First Time ◽  
Level 2 ◽  
Aerosol Type

Abstract. The Multi-angle Imaging SpectroRadiometer (MISR) Joint Aerosol (JOINT_AS) Level 3 product has provided a global, descriptive summary of MISR Level 2 aerosol optical depth (AOD) and aerosol type information for each month over 16+ years since March 2000. Using Version 1 of JOINT_AS, which is based on the operational (Version 22) MISR Level 2 aerosol product, this study analyzes, for the first time, characteristics of observed and simulated distributions of AOD for three broad classes of aerosols: spherical nonabsorbing, spherical absorbing, and nonspherical – near or downwind of their major source regions. The statistical moments (means, standard deviations, and skewnesses) and distributions of AOD by components derived from the JOINT_AS are compared with results from two chemistry transport models (CTMs), the Goddard Chemistry Aerosol Radiation and Transport (GOCART) and SPectral RadIatioN-TrAnSport (SPRINTARS). Overall, the AOD distributions retrieved from MISR and modeled by GOCART and SPRINTARS agree with each other in a qualitative sense. Marginal distributions of AOD for each aerosol type in both MISR and models show considerable high positive skewness, which indicates the importance of including extreme AOD events when comparing satellite retrievals with models. The MISR JOINT_AS product will greatly facilitate comparisons between satellite observations and model simulations of aerosols by type.

scholarly journals Simplified one-dimensional calculation of 13.5 nm emission in a tin plasma including radiation transport

2009 ◽  
Vol 106 (11) ◽  
pp. 113303 ◽  
Author(s):  
J. White ◽  
P. Dunne ◽  
P. Hayden ◽  
G. O’Sullivan
Keyword(s):  
Radiation Transport ◽  
One Dimensional ◽  
Tin Plasma

Voyager UVS observations of stellar occultations by the rings of Saturn

1984 ◽  
Vol 75 ◽  
pp. 265-277
Author(s):  
J.B. Holbelg ◽  
W.T. Forrester
Keyword(s):  
Optical Depth ◽  
Distance Scale ◽  
Density Waves ◽  
Ring Density ◽  
Stellar Occultations ◽  
Saturn’S Rings ◽  
Saturn's Rings

ABSTRACTDuring the Voyager 1 and 2 Saturn encounters the ultraviolet spectrometers observed three separate stellar occultations by Saturn's rings. Together these three observations, which sampled the optical depth of the rings at resolutions from 3 to 6 km. can be used to establish a highly accurate distance scale allowing the identification of numerous ring features associated with resonances due to exterior satellites. Three separate observations of an eccentric ringlet near the location of the Titan apsidal resonance are discussed along with other ringlet-resonance associations occurring in the C ring. Density waves occurring in the A and B rings are reviewed and a detailed discussion of the analysis of one of these features is presented.

Bipolar radiofrequency induced thermotherapy and 1064 nm Nd:Yag laser in endovenous occlusion of insufficient veins: short term follow up results

VASA ◽  
2011 ◽  
Vol 40 (3) ◽  
pp. 235-240 ◽  
Author(s):  
Krnic ◽  
Sucic
Keyword(s):  
Side Effects ◽  
Success Rate ◽  
Nd:Yag Laser ◽  
Main Stem ◽  
Short Term ◽  
Main Trunk ◽  
Bipolar Radiofrequency ◽  
Saphenous Veins ◽  
Skin Redness ◽  
Complete Failure

Background: The aim of this study is to report our results in main stem vein closure using the bipolar radiofrequency induced thermotherapy (RFITT) system and the 1064nm Nd:Yag laser. Patients and methods: 44 incompetent main stem veins (37 great saphenous veins, one lesser saphenous vein, and 6 anterior accessory saphenous veins) in 29 patients were treated using RFITT. 53 incompetent main stem veins (45 great saphenous veins, 4 lesser saphenous veins, and 4 anterior accessory saphenous veins) in 43 patients were treated endovenously with 1064 nm Nd:Yag laser. All patients underwent postoperative duplex scanning within a month after procedure, as well as a short interview regarding postoperative discomfort. Results: In main stem veins treated with RFITT, the success rate within the first month was 86,4 % (38 out of 44 veins). Complete failure rate was 13,6 % (6 out of 44 veins). In 53 main stem veins treated by 1064 nm Nd:Yag laser, the success rate was 100 %, consisting of 98,1 % complete success (52/53 veins), and 1,9 % partial success (1/53 veins). None of the patients treated with RFITT experienced postoperative adverse effects, whereas 13/43 (30,2 %) patients treated with laser had to use oral analgesics after the treatment, and 21/43 (48,8 %) patients reported transient skin changes, such as bruising or skin redness. Conclusions: RFITT system was fairly efficient in the short term for closure of main trunk veins, whereas longer term results are still scarce. Postoperative side effects of RFITT were minimal. 1064nm Nd:Yag laser, according to short term results, proved to be very effective for main stem vein closure. Postoperative side effects related to 1064 nm Nd:Yag endovenous laser treatment proved to be minor, transient, and acceptable.

Das Management von Glaskörpertrübungen

2020 ◽  
Vol 10 (03) ◽  
pp. 243-254
Author(s):  
Albrecht Lommatzsch
Keyword(s):  
Nd:Yag Laser ◽  
Randomisierte Studien

ZusammenfassungDas Management von symptomatischen Glaskörpertrübungen stellt sich in der täglichen Praxis oft als kompliziert dar. Die Nd:YAG-Laser-Vitreolyse rückt als weitere therapeutische Option immer mehr in den Fokus. Vergleichende randomisierte Studien zur Vitrektomie, Nd:YAG-Laser-Vitreolyse und einer abwartenden Vorgehensweise zum Spontanverlauf gibt es leider nicht. Dieser Beitrag versucht, zu dieser Problematik einen Überblick zu geben.

Erfolgreiche Entfernung des OTSC®-Systems durch Destruktion mittels Nd:YAG-Laser

2010 ◽  
Vol 48 (08) ◽  
Author(s):  
M Fähndrich ◽  
M Sandmann ◽  
M Heike
Keyword(s):  
Nd:Yag Laser

Diagnostik und minimal invasive Therapie von Epiglottiserkrankungen beim Pferd

2003 ◽  
Vol 31 (05) ◽  
pp. 273-279
Author(s):  
E. Deegen ◽  
B. Ohnesorge
Keyword(s):  
Nd:Yag Laser ◽  
Minimal Invasive ◽  
Minimal Invasiv

ZusammenfassungIn der Zeit von 1993 bis 2001 wurden in der Klinik für Pferde der Tierärztlichen Hochschule Hannover 21 Pferde mit einem Epiglottisentrapment vorgestellt, davon 29% (6/21) Vollblutpferde. Drei der 21 Tiere wiesen zusätzlich eine Subepiglottiszyste auf. Im Rahmen der klinischen und endoskopischen Diagnostik wurden Entrapmentfalten in unterschiedlicher Größe, in einem Fall auch ein habituelles Entrapment festgestellt. Die verlagerte Schleimhautfalte, die in 24% (5/21) der Fälle ulzerativ verändert war, führte bei 52% (11/21) der Pferde zu einem Atemgeräusch bei Belastung, 38% (8/21) der Pferde zeigten Husten und 14% (3/21) die Symptome einer Dysphagie. Weitere Befunde waren Epiglottishypoplasie bzw. -deformation (5/21) und Dorsalverlagerung des Gaumensegels (6/21), sodass insgesamt 38% (8/21) der Pferde zusätzlich erhebliche morphologische oder funktionelle Abweichungen im Laryngopharynx aufwiesen. Die Behandlung des Entrapments erfolgte minimal invasiv transendoskopisch unter Anwendung unterschiedlicher Methoden. So wurde die Schleimhautfalte in Narkose oder beim sedierten Pferd transnasal entweder mittels eines hakenförmig gebogenen Hochfrequenzpapillotoms oder laserchirurgisch mit dem Nd:YAG-Laser und einer Barefiber median gespalten. Verbliebene Schleimhaut wurde falls erforderlich mit einer Hochfrequenz-Polypektomieschlinge reseziert. Letzteres Verfahren kam auch zur Resektion von subepiglottaler Schleimhaut im Fall des habituellen Entrapments zur Anwendung. Bei 80% (8/10) der Patienten ohne komplizierende Epiglottisveränderung oder Gaumensegelverlagerung gelang eine zufrieden stellende Therapie, wobei ein Rezidiv nachbehandelt wurde. Als besonders geeignet erwies sich die Operation mit dem gebogenen Hochfrequenzpapillotom am sedierten Pferd. Bei allen Patienten mit Entrapment und gleichzeitiger Subepiglottiszyste verlief die Behandlung erfolgreich (3/3). Im Gegensatz dazu zeigten nur 25% (2/8) der Pferde mit anderen komplizierenden Erkrankungen postoperativ keine Beeinträchtigungen.

Sign in / Sign up

Export Citation Format

Share Document