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Radiofrequency thermal ablation for sleep-relat...
21,99 € *
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Sleep-disordered breathing is rising in prevalence and has a large associated health and socio-economic burden. There has been growing interest, but a poor understanding, regarding the role and mode of action of radiofrequency ablation therapy. This thesis describes the role of radiofrequency thermal ablation in sleep-related breathing disorders and provides current updates in its scientific, cellular basis along with surgical tips and pitfalls. Long term outcomes, management strategies and further avenues for research are considered.

Anbieter: Dodax
Stand: 27.01.2020
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Simulation of RFA of liver tumors
50,40 € *
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Local therapy with radiofrequency ablation (RFA) is an important method for treating liver tumors mostly in early stage, which has been increasingly used in recent years. RFA utilizes an RF current that is applied to the target tissue through an electrode connected with a power generator and percutaneously inserted into the tumor, the electrode power causes the tissue temperature rise required for destroying cancer cells. If RF thermal ablation entails numerous advantages - such as high repeatability of treatments, suitability for patients who can t undergo surgery, quick procedure and fast recovery -, there are still some inconveniences and difficulties coupled with this technique. One of these problems is the so called heat sink effects, resulting from the presence of large blood vessels close to the electrode tip.Finally, a comparison work has been conducted between two different ablation modalities (RF versus MW) showing similarities and differences until the conclusion that currently the RFA treatment is the most suitable treatment for tumors in early stage, small and localized.

Anbieter: Dodax AT
Stand: 27.01.2020
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Simulation of RFA of liver tumors
49,00 € *
ggf. zzgl. Versand

Local therapy with radiofrequency ablation (RFA) is an important method for treating liver tumors mostly in early stage, which has been increasingly used in recent years. RFA utilizes an RF current that is applied to the target tissue through an electrode connected with a power generator and percutaneously inserted into the tumor, the electrode power causes the tissue temperature rise required for destroying cancer cells. If RF thermal ablation entails numerous advantages - such as high repeatability of treatments, suitability for patients who can t undergo surgery, quick procedure and fast recovery -, there are still some inconveniences and difficulties coupled with this technique. One of these problems is the so called heat sink effects, resulting from the presence of large blood vessels close to the electrode tip.Finally, a comparison work has been conducted between two different ablation modalities (RF versus MW) showing similarities and differences until the conclusion that currently the RFA treatment is the most suitable treatment for tumors in early stage, small and localized.

Anbieter: Dodax
Stand: 27.01.2020
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Fundamental study: Space-temporal evolution of ...
82,20 € *
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After decades of development, laser ablation has become an important technique for a large number of applications such as thin film deposition, nanoparticle synthesis, micromachining, chemical analysis, etc. Experimental and theoretical studies have been conducted to understand the physical mechanisms of the laser ablation processes and their dependence on the laser wavelength, pulse duration, ambient gas and target material. The present work describes and investigates the relative importance of the physical mechanisms influencing the characteristics of aluminum laser-induced plasmas. The general scope of this research encompasses a thorough study of the interplay between the plasma plume dynamics and the ambient gas in which they expand. This is achieved by imaging and analyzing the temporal and spatial evolution the plume in terms of spectral intensity, electron density and excitation temperature within various environments, extending from vacuum to atmospheric pressure (760 Torr), in an inert gas like argon and heluim, as well as in a chemically active gas like nitrogen.

Anbieter: Dodax AT
Stand: 27.01.2020
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Keltie Glacier
29,90 € *
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Keltie Glacier is a large Antarctic glacier, 48 km (30 mi) long, draining from Pain Névé southwest around the southern extremity of the Commonwealth Range, and then northwest to enter Beardmore Glacier at Ranfurly Point.Discovered by the British Antarctic Expedition (1907-09) under Shackleton, who named it for Sir John Scott Keltie, Secretary of the Royal Geographical Society, 1892-1915.A glacier is a large persistent body of ice that forms where the accumulation of snow exceeds its ablation (melting and sublimation) over many years, often centuries. At least 0.1 km² in area and 50 m thick, but often much larger, a glacier slowly deforms and flows due to stresses induced by its weight.

Anbieter: Dodax AT
Stand: 27.01.2020
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Fundamental study: Space-temporal evolution of ...
79,90 € *
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After decades of development, laser ablation has become an important technique for a large number of applications such as thin film deposition, nanoparticle synthesis, micromachining, chemical analysis, etc. Experimental and theoretical studies have been conducted to understand the physical mechanisms of the laser ablation processes and their dependence on the laser wavelength, pulse duration, ambient gas and target material. The present work describes and investigates the relative importance of the physical mechanisms influencing the characteristics of aluminum laser-induced plasmas. The general scope of this research encompasses a thorough study of the interplay between the plasma plume dynamics and the ambient gas in which they expand. This is achieved by imaging and analyzing the temporal and spatial evolution the plume in terms of spectral intensity, electron density and excitation temperature within various environments, extending from vacuum to atmospheric pressure (760 Torr), in an inert gas like argon and heluim, as well as in a chemically active gas like nitrogen.

Anbieter: Dodax
Stand: 27.01.2020
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Land Glacier
29,90 € *
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Land Glacier (75°40 S 141°45 W / 75.667°S 141.75°W / -75.667, -141.75), is a broad, heavily-crevassed glacier, about 35 miles long, descending into Land Bay in Marie Byrd Land, Antarctica. Discovered by the U.S. Antarctic Service (USAS) (1939-41) and named for R. Admiral Emory S. Land, Chairman of the U.S. Maritime Commission.A glacier is a large persistent body of ice that forms where the accumulation of snow exceeds its ablation (melting and sublimation) over many years, often centuries.

Anbieter: Dodax AT
Stand: 27.01.2020
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Liv Glacier
29,90 € *
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Liv Glacier is a steep valley glacier, 64 km (40 mi) long, emerging from the Antarctic Plateau just southeast of Barnum Peak and draining north through the Queen Maud Mountains to enter Ross Ice Shelf between Mayer Crags and Duncan Mountains. Discovered in 1911 by Roald Amundsen, who named it for the daughter of Fridtjof Nansen.A glacier is a large persistent body of ice that forms where the accumulation of snow exceeds its ablation (melting and sublimation) over many years, often centuries.

Anbieter: Dodax AT
Stand: 27.01.2020
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Radiofrequency Ablation Of Liver - An Experimen...
70,00 € *
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Radio frequency ablation (RFA) has become the most commonly used ablative therapy for selected group of patients with liver tumors. To understand the effectiveness of RFA it is important to understand the mechanism of injury to the liver caused by RFA. There is no large animal model to study hepatocellular cancer. This book details the animal experiments carried out by the author in an attempt to create a porcine model of hepatocellular cancer. This book also details the discovery of Transition zone following ablation of liver tissue. This zone lies beyond the zone of cell necrosis and can not be identified by the usual histological techniques. Transition zone lies between necrotic liver tissue and normal liver parenchyma in lesion produced by RFA. This zone has cells showing apoptosis and increased expression of Heat Shock Protein (HSP) suggestive of cellular injury which will eventually lead to cell death. Further research to find techniques to increase the size of "Transition zone" may help in ablating larger areas of liver tumors.

Anbieter: Dodax AT
Stand: 27.01.2020
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