The Killing School brings listeners inside the US Naval Special Warfare (SEAL) Scout/Sniper Course - the gruelling three-month training program that produces the world's deadliest snipers. As a SEAL sniper and combat veteran, Brandon Webb was tasked with revamping the US Naval Special Warfare (SEAL) Scout/Sniper School, incorporating the latest advances in technology to create an entirely new course that continues to test even the best warriors. In this revealing new book, Webb takes listeners through every aspect of the elite training. Trainees learn to utilize every edge possible to make their shot count - studying crosswinds, barometric pressure, latitude, and even the rotation of the Earth to become ballistic experts. In addition to marksmanship, each SEAL's endurance, stealth, and mental and physical stamina are pushed to the breaking point. Webb also shows how this training plays out in combat, using real-life exploits of the world's top snipers, including Jason Delgado, who made some of the most remarkable kill shots in the Iraq War; Nicholas Irving, the US Army Ranger credited with 33 kills in a single tour in Afghanistan; and Rob Furlong, who during Operation Anaconda delivered the then-longest kill shot in history. During Webb's sniper school tenure, the course graduated some of the deadliest snipers of this generation, including Marcus Luttrell (Lone Survivor), Adam Brown (Fearless), and Chris Kyle (American Sniper). The Killing School demonstrates how today's sniper is trained to function as an entire military operation rolled into a single individual - an army of one. 1. Language: English. Narrator: Haywood Morse. Audio sample: http://samples.audible.de/bk/qpuk/000335/bk_qpuk_000335_sample.mp3. Digital audiobook in aax.
Etching process involves various chemical reactions and reflects significantly on silicon wafer quality. Design of Experiments (DOE) with full factorial design is employed for optimization purpose. Etching factors namely the bubbling flow rate, wafer rotation, and etchant temperature had been randomized with additional three center points to observe any curvature. The responses studied are etching removal, total thickness variation (TTV) and wafer brightness. Additionally, the etchant temperature and bubbling flow rate provide interaction effect on both etching removal and wafer brightness. A higher bubbling flow rate is required to ensure etching removal and brightness within specification. Besides studying these three responses, the wafer surface after etching is analyzed using ADE Infotool software which captures the etched surface profile and its thickness. Finally, the removal uniformity throughout the redesigned etching drum is observed. Etching performance is enhanced with the optimized value of bubbling flow rate, etchant temperature and wafer rotation to achieve the optimum etching removal distribution.
The atmosphere of Venus contains highly scattering aerosols in suspension, mostly at cloud top layer. This cloud deck covers entirely the planet, imposing an unusually high albedo. These particles are carried by the wind, carrying with them the information on atmospheric dynamics. The main purpose of this work is to contribute to a better understanding of the dynamics of the Venusian atmosphere, constraining its characterization at cloud top level, complementing the observations of the Venus Express spacecraft with ground-based observations. In order to achieve this objective of studying the atmospheric super-rotation, it was measured the zonal wind velocity (crosswind the planet from East to West) and its spatial and temporal variability, by means of high precision spectroscopy and Doppler velocimetry.
A global trend towards sustainable industry has highlighted a need to source energy and chemicals from renewable feed stocks. A move to farming short-rotation lignocellulosic biomass is one solution to the feed stock problem. However, it is also critical to use a fractionation technology that is appropriate to the biomass type and location. This text details doctoral research on the ethanol organosolv process for fractionation of short-rotation willow. The work is presented in three stages. First, the kinetics of delignification is studied with regard to the important parameters. The effect of prehydrolysis on subsequent organosolv pulping is revealed. Secondly, the easy recovery of organosolv lignin is illustrated with a novel application of flotation. The hydrophobic nature of organosolv lignin allows easy recovery by simultaneous precipitation and dissolved air flotation. Finally, the utility of organosolv lignin is verified with direct replacement of phenol in the manufacture of phenol formaldehyde resin. This text will be of interest to process engineers studying lignocellulosic fractionation and those in the field of lignin product development.
The goal of the research documented in the thesis is to investigate the stability of ferrofluids. In particular, the work focuses on the thin layer of ferrofluid heated from below. Chapter 1 has provided a brief overview of ferrofluid history along with several basic definitions needed to understand the material presented in the later chapters. Chapter 2 deals with the theoretical investigation of the nonlinear stability analysis of magnetized ferrofluid heated from below. Chapters 3 and 4 are devoted to study the effect of rotation and solute, respectively, on stability of magnetized Introduction 29 ferrofluid. Chapter 5 deals with the theoretical investigation of the nonlinear stability analysis of magnetized ferrofluid heated from below saturating a porous medium of high permeability via generalized energy method using a Brinkman model. Chapters 6 and 7 focus on studying the effect of rotation and solute respectively, on stability of magnetized ferrofluid saturating a porous medium. Finally, a summary of the present work and some future directions are presented.
Hot dark matter is a hypothetical form of dark matter which consists of particles that travel with ultrarelativistic velocities. The best candidate for the identity of hot dark matter is the neutrino. Neutrinos have very small masses, and do not partake in two of the four fundamental forces, the electromagnetic interaction and the strong interaction. They do interact by the weak interaction, and gravity, but due to the feeble strength of these forces, they are difficult to detect. A number of projects, such as the Super-Kamiokande neutrino observatory, in Gifu, Japan are currently studying these neutrinos.Dark matter is matter that cannot be detected by electromagnetic radiation, hence dark. It is postulated to exist to explain how clusters and superclusters of galaxies formed after the big bang. Data from galaxy rotation curves indicate that around 90% of the mass of a galaxy cannot be seen. It can only be detected by its gravitational effect.Hot dark matter cannot explain how individual galaxies formed from the big bang.
The present work aims, primarily, at studying the problem of two bodies with varying mass which has important practical and astrophysical applications. The ejection of mass from any body depends on many parameters, amongst the most important of which are the central condensation (which means, more or less, the degree of rigidity of the body) and the velocity of rotation which provides the external layers with the angular momentum that activates the process of ejection of mass.The procedure followed is developed in the Hamiltonian framework, and is expressed explicitly in terms of the coordinates using Lie series.
For almost a decade, Control and Automation engineers have been exploring the control over robotic mechanisms that deals flexibility, which plays an important role in space structure applications. Flexibility is an unwanted feature in robot manipulators which causes vibrations and static deflection control problems. The demand for high-speed robotic manipulators with slight or no vibrations has been a challenging research problem. These requirements and limitations give rise to many interesting issues from a control perspective. The objective of studying the manipulator here is to design and test different control schemes for a single-link flexible manipulator. The dynamic model of the system is derived by using the Lagrangian method. The system has two degrees of freedom (DOF) which corresponds to the motor shaft rotation angle with respect to a coordinate frame fixed to the base and the rotation of the flexible joint to which link is attached with respect to the motor.
High Quality Content by WIKIPEDIA articles! Vera (Cooper) Rubin (born 23 July 1928) is an American astronomer who pioneered work on galaxy rotation rates. Her opus magnum was the uncovering of the discrepancy between the predicted angular motion of galaxies and the observed motion, by studying galactic rotation curves. This phenomenon became known as the galaxy rotation problem. Currently, the theory of dark matter is the most popular candidate for explaining this. The alternative theory of MOND (Modified Newtonian Dynamics) has little support in the community. Rubin, however, supports the MOND approach, stating "If I could have my pick, I would like to learn that Newton's laws must be modified in order to correctly describe gravitational interactions at large distances. That's more appealing than a universe filled with a new kind of sub-nuclear particle."