By Alwyn T. Lloyd
Read or Download B-52 Stratofortress: In Detail and Scale PDF
Best technology books
Artifacts associated with projectile applied sciences regularly have supplied the rules for time-space systematics and cultural-historic frameworks in archaeological examine having to do with foragers. With the shift in archae ological learn targets to processual interpretations, projectile technolo gies proceed to obtain marked awareness, yet with an emphasis at the implications of variability in such components as layout, functionality, and fabric as they relate to the wider questions of human version.
Know-how move has elevated speedily over the last twenty years in Western Europe, North the US and the Pacific Rim. it's been anticipated that a few 50% of recent items and approaches will originate open air the first developer; educational and different learn associations are noticeable resources of a lot of this new know-how.
- Thermal Deformation in Machine Tools
- Ceramic matrix composites : materials, modeling and technology
- Energy Technology 2012: Carbon Dioxide Management and Other Technologies
- How It Works, Issue 75
- Tesla Said
Additional info for B-52 Stratofortress: In Detail and Scale
The resulting focus shift depends almost linear on the nominal focal position, which can be corrected by appropriate scaling of the 3D structure. However, one important issue is the loss of the axial symmetry with respect to the main maximum of the focus. In confocal microscopy this leads to a difference in the resulting image when focusing above or below a fluorescent specimen. The loss of axial and vertical resolution and more importantly the drastic reduction of laser intensity have a huge impact on direct laser writing.
The loss of axial and vertical resolution and more importantly the drastic reduction of laser intensity have a huge impact on direct laser writing. 47) at a nominal focus position of 50 µm . However, the intensity of a fluorescence signal, which indicates the absorption rate of the photoactive dye, dropped to 30 % of the original value. Compared to confocal microscopy this effect is less drastic in direct laser writing, since the point spread function of the observation system is negligible.
Another possibility is the reduction of the nominal focal position. This technique is wide spread among laboratories performing direct laser writing. For high resolution structures, the structure is built from the bottom to the top, with the laser beam entering the material from the bottom. By this means, the realization of high structures poses a problem, since spherical aberration increases with increasing structure height. Additionally, refractive index 32 S. Engelhardt Fig. 6 at a nominal focus position of 100 µm.
B-52 Stratofortress: In Detail and Scale by Alwyn T. Lloyd