1.3 Describe the main reservoirs of infectious agents. 1.4 Describe the chain of transmission of communicable diseases and explain how infectious agents are transmitted by direct and indirect modes. 1.5 Describe the characteristics of susceptible hosts and the main risk factors for development of communicable diseases.
Seismic tomography. Seismic tomography is a technique for imaging the subsurface of the Earth with seismic waves produced by earthquakes or explosions. P-, S-, and surface waves can be used for tomographic models of different resolutions based on seismic wavelength, wave source distance, and the seismograph array coverage. The data received at seismometers are used to solve an inverse problem, wherein the locations of reflection and refraction of the wave paths are determined. This solution can be used to create 3D
They can be divided into two major groups: transverse waves and longitudinal waves. Transverse waves include waves on a string, electromagnetic waves, and seismic S waves. These are waves in which the particles in the medium move in a direction perpendicular to the path of the wave.Transverse waves travel well in solids, but not in fluids like liquid or gas.hey can be divided into two major groups: transverse waves and longitudinal waves. Transverse waves include waves on a string, electromagnetic waves, and seismic S waves. These are waves in which the particles in the medium move in a direction perpendicular to the path of the wave.