


Title

FASTCAM SA1 : DigInfo





Abstract 
DigInfo  http://movie.diginfo.tv Photron, who produces highspeed video camera solutions, has just released its FASTCAM SA1. This highspeed camera can film 1,024x1,024 fullframe pixels at 5,400 frame/s. Segmented frame is available as well: 1,024x512 pixels at 10,000 frame/s; 128x128 pixels at 90,000 frame/s; and 128x32 pixels at the maximum speed of 150,000 frame/s. The camera comes with a 2microsecond electronic shutter, an embedded CMOS sensor for color and monochrome shoots, and a collection of presets so as to not to initially overwhelm the user. It comes with 8GB of memory (easily expandable to 16GB) which can be subdivided into folders so you can organize your photos more effectively. 


Title

Aerodynamics





Abstract 
Aerodynamics (shaping of objects that affect the flow of air or gas) is a branch of fluid dynamics concerned with the study of forces generated on a body in a flow. The solution of an aerodynamic problem normally involves calculating for various properties of the flow, such as velocity, pressure, density, and temperature, as a function of space and time. Understanding the flow pattern makes it possible to calculate or approximate the forces and moments acting on bodies in the flow. The use of mathematical analysis, empirical approximation and wind tunnel experimentation form the scientific basis for heavierthanair flight. Airflow across an aircraft wing. A greater angle deflects air downwards at a geater angle to increase LiftAerodynamic problems can be classified in a number of ways. The flow environment defines the first classification criterion. External aerodynamics is the study of flow around solid objects of various shapes. Evaluating the lift and drag on an airplane, the shock waves that form in front of the nose of a rocket or the flow of air over a hard drive head are examples of external aerodynamics. Internal aerodynamics is the study of flow through passages in solid objects. For instance, intern... 


Title

Speed of Sound





Abstract 
Sound is a vibration that travels through an elastic medium as a wave. The speed of sound describes how far this wave travels in a given amount of time. In dry air at 20 °C (68 °F), the speed of sound is 343 meters per second (1,125 ft/s). This equates to 1,236 kilometers per hour (768 mph), or about one mile in five seconds. This figure for air (or any given gas) increases with gas temperature (equations are given below), but is nearly independent of pressure or density for a given gas. For different gases, the speed of sound is dependent on the mean molecular weight of the gas, and to a lesser extent upon the wa... 


Title

FASTCAM MH410K : DigInfo





Abstract 
DigInfo  http://movie.diginfo.tv Photron developed this highspeed camera system for use in vehicle safety tests. A single controller connects with up to four camera heads to enable the system to shoot highspeed, highresolution imagery. By connecting multiple controllers to the system it is possible to monitor a greater number of angles using 8 to 12 camera heads. This camera system makes it possible to shoot highspeed (2,000 frames per second), highresolution (512x512 pixels) images simultaneously from four different angles in order to evaluate motor vehicle safety during crash tests. The system enables engineers to obtain more detailed results than with previous camera systems. In motor vehicle crash tests it is necessary to shoot various locations within the vehicle compartment, and so it is necessary to position the cameras in confined spaces. To satisfy these requirements, Photron miniaturized the system camera heads. A single camera head weighs 100g and measures 35x35x34mm. Because the camera head is so small that it fits in the palm of even the tiniest of hands, it is possible to place numerous camera heads in previously hard to view spots such as the floor of the passenger seat, under the steering wheel, and so forth.... 


Title

David Waite's Transformation Equation's





Abstract 
In physics, the Lorentz transformation converts between two different observers' measurements of space and time, where one observer is in constant motion with respect to the other. In classical physics (Galilean relativity), the only conversion believed necessary was x' = x − vt, describing how the origin of one observer's coordinate system slides through space with respect to the other's, at speed v and along the xaxis of each frame. According to special relativity, this is only a good approximation at much smaller speeds than the speed of light, and in general the result is not just an offsetting of the x coordinates; lengths and times are distorted as well.
If space is homogeneous, then the Lorentz transformation must be a linear transformation. Also, since relativity postulates that the speed of light is the same for all observers, it must preserve the spacetime interval between any two events in Minkowski space. The Lorentz transformations describe only the transformations in which the event at x=0, t=0 is left fixed, so they can be considered as a rotation of Minkowski space. The more general set of transformations that also includes translations is known as the Poincaré group. 


Title

Tensors in Special relativity.





Abstract 
A bloglecture version of chapter two section two of Modern Relativity's special relativity by David Waite.
Special relativity (SR) (aka the special theory of relativity (STR)) is the physical theory of measurement in inertial frames of reference proposed in 1905 by Albert Einstein in his article "On the Electrodynamics of Moving Bodies"[1]. It generalizes Galileo's principle of relativity — that all uniform motion was relative, and that there is no absolute and welldefined state of rest (no privileged reference frames) — from mechanics to all the laws of physics, including electrodynamics.
To stress this point, Einstein not only widened the postulate of relativity, but added the second postulate that all observers will always measure the speed of light to be the same no matter what their state of uniform linear motion.[2]
This theory has a variety of surprising consequences that violate common sense, but all have been experimentally verified. Special relativity overthrows Newtonian notions of absolute space and time by stating that time and space are perceived differently in the sense that measurements of length and time intervals depend on the motion of the observer. It yields the equivalence of matter and energy, as ... 


Title

Sound Refraction  Sound Lens





Abstract 
Refraction is the change in direction of a wave due to a change in its speed. This is most commonly observed when a wave passes from one medium to another. Refraction of light is the most commonly observed example, but any type of wave can refract when it interacts with a medium, for example when sound waves pass from one medium into another or when water waves move into water of a different depth. Refraction is described by Snell's law. In optics, refraction occurs when light waves travel from a medium with a given refractive index to a medium with another. At the b... 


Title

Effect of gas on voice





Abstract 
Effect of gas on voice 


Title

Crosswind Landing of Airbus 380





Abstract 
A crosswind is any wind that is blowing perpendicular to a line of travel, or perpendicular to a direction. For example, in aviation, a crosswind is the component of wind which is blowing 90 degrees to the runway, making a landing more difficult than if the wind were blowing straight down the runway. In fact if a crosswind is strong enough it may exceed an aircraft's crosswind limit, and attempting to land under such conditions could cause structural damage to the aircraft's undercarriage. Crosswinds can also occur when traveling on road, especially on large bridges and highways, which can be dangerous for motorists because of possi... 

