Re-entry and Planetary Entry Physics and Technology ab 128.49 EURO I / Dynamics Physics Radiation Heat Transfer and Ablation Applied Physics and Engineering. Softcover reprint of the original 1st ed. 1968
Relativistic Molecular Dynamics Simulation ofUltrafast Laser Ablation ab 48.99 EURO Using three-dimensional relativistic moleculardynamics simulations
Ultrafast dynamics of melting and ablation at large laser intensities ab 16.1 EURO
The phenomena of Coulomb explosion require the consideration of special relativity due to the involvement of high-energy electrons or ions. It is known that laser ablation processes at high laser intensities may lead to the Coulomb explosion, and their released energy is in the regime of kilo to mega eV. In contrast to conventional MD simulations, we adopt the 3D relativistic RMD method to consider the effects of special relativity in the conventional MD simulation for charged particles in strong electromagnetic fields. Furthermore, we develop a Coulomb force scheme, combining with the Lennard-Jones potential, to calculate interactions between charged particles, and adopt a Verlet list scheme to compute the interactions between each particle. It is found that the damage depth does not increase with repeated laser ablation when the pulse frequency is comparable to the duration of the pulse. Furthermore, we report the time evolution of energy propagation in space in the laser ablation process. The temporal-spatial distribution of energy indirectly indicates the temperature evolution on the surface of solid under intense laser illumination
This dissertation, through a systematic investigation of the behavior of the gas-phase dynamics ofnanoparticles generated by laser ablation of solid target materials in background gasesand a study of the physical processes involved in gas-phase nanoparticle processing, explores the combination of laser and aerosol processes as a novel approach to make thinfilm materials with a level of microscopic organization similar to that found in nature.The integrated laser-aerosol method is very flexible and can be used in thesynthesis of a variety of materials. In this study it is applied to the deposition ofnanocomposite thin films comprising tetrahedral amorphous carbon (ta-C) withembedded metal nanoparticles. The controlled incorporation of metal nanoparticlesenables the modulation of the electrical conductivity of ta-C over four orders ofmagnitude without significantly or adversely affecting its mechanical properties.
This book reveals some details of research done at Marshall University, USA, involving functional aspects of pancreatic beta cells in several experimental models: avian, transgenic mice, and beta-cell lines. In this book you will gain some knowledge of genetic engineering approaches to improve beta-cell insulin secretion which could be applied to manage models and cases of diabetes mellitus. This work is presented as three separate chapters. The first chapter aims to gain an understanding of the expression pattern of CaBP28k in the chicken pancreas and to explore its spatial relationships with insulin in beta cells. The second chapter is to identify the influence of CaBP28k-ablation on the dynamics of [Ca2+]i in response to glucose stimulation in murine beta cells of CaBP28k-KO mice pancreatic islets and wildtype islets. The third chapter is an attempt to elucidate the genomic and non-genomic effects of in vitro CaBP28k-ablation in a cultured beta-cell line. It highlights the effects on the gene expression profile and insulin secretory responses from cultured rat insulinoma cell lines using antisense oligonucleotides transfection.
This book is an expression of the myriad ways in which the range of Remote Sensing and GIS techniques can be applied to the mapping of glaciers. Glaciers are characterized by the variability of different types of snow and ice deposited in accumulation and ablation areas. Remote Sensing techniques like Digital image processing of satellite data provide an effective solution for categorizing the various materials on glaciers depending upon their spectral reflectance.Visual interpretation in glaciated terrain suffers mainly because of less understanding highly variable material composition and processes operative over glaciers. This sometimes leads to biased interpretation based on little knowledge which leads to wrong interpretation. Inventory of the glaciers is of prime interest to evaluate the nature of changes in glacier dimensions and also to establish relationship between climatic change and dynamics of glaciers. As glaciological studies in high altitude terrains are very difficult by conventional methods. Remote Sensing data with GIS techniques is used to mapping and monitoring of permanent snowfields and glacier covered area.
Z-pinch belongs to one of the most fascinating plasma objects due to its simplicity, natural occurrence and variety of applications. This book focuses on a Z-pinch formed from a carbon fibre with a few micrometers in diameter. On the one hand, a large number of papers are devoted to studies of Z-pinches initiated from a high atomic number metal wire. On the other hand, no systematic effort has been made to study a Z-pinch initiated from a carbon fibre in vacuum using a simple capacitor bank. This work presents the description of carbon fibre Z-pinch dynamics and it shows that unique properties of carbon could provide valuable data not only for Z-pinch physics (breakdown physics, implosion of a low density plasma, carbon fiber ablation, dynamics of bright spots etc.) but also for life science and material science in which carbon is often used. Therefore, this resource might be helpful to those who are interested in physics and diagnostics of Z-pinch plasma and to those who want to know what happens when an electric current of 100 kiloamperes starts to flow through a few micrometer thick carbon fibre.
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.