SURFACE SUBSIDENCE AND COLLAPSE
Subsidence (지반침하)
지표 일부의 침하나 붕괴
지반침하에 의한 이동은 수직적임
갑작스런 붕괴나 감지할 수 없을 정도로 느리게 침하하는 경우도 있음
지반 침하는 지역적이거나 또는 광역적일 수 있다.
물은 지반침하와 밀접한 관계가 있다.
지반
Atomic Force Microscopy or Scanning Force Microscopy
AFM is one of many techniques which fall under the Scanned Probe Microscopy (SPM) family of instruments. In all of these SPM techniques a small probe (10-100 nm radius of curvature) is scanned by a piezoelectric device over a sample to produce an image of the sample surface.The first of the SPM techniques was the Scanning Tunneling Microsc
SPM (Scanning Probe Microscope)
SPM is a branch of microscopy that forms images of surfaces using a physical probe
the interaction between end of the tip and surface of sample
not only the images of surface of sample but also the various physical properties of sample
The components of SPM
Probe
optical mechanic part to detect interactions
three-dimensional nano scanner part
di
surface.
Exposure to the ultraviolet laser light cures and solidifies the pattern.
After the pattern has been traced, the platform descends by a distance equal to the thickness of a single layer.
SLS - Selective Laser Sintering
An additive manufacturing technique that uses a laser as the power source to sinter powdered material (typically metal).
The laser selectively fuses powdered materi
2. Theory.
2.1 Polishing.
Polishing is the process of creating a smooth and shiny surface by rubbing it or using a chemical action, leaving a surface with significant specular reflection and minimal diffuse reflection. When the surface is magnified thousands of times, it usually looks like mountains and valleys. By repeated abrasion, those "mountains" are worn down until they are flat or just