scholarly journals Frequency comb-based multidimensional coherent spectroscopy bridges the gap between fundamental science and cutting-edge technology

2021 ◽  
Vol 154 (16) ◽  
pp. 160901
Author(s):  
Bachana Lomsadze
Keyword(s):  
Frequency Comb ◽  
Cutting Edge ◽  
Fundamental Science ◽  
Coherent Spectroscopy

scholarly journals Black Holes and Objectivity

Artnodes ◽  
2020 ◽  
Author(s):  
Mónica Bello Bugallo
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Paradigm Shift ◽  
Cutting Edge ◽  
Direct Image ◽  
Fundamental Science ◽  
Cultural Appreciation

The first ever direct image of a black hole, released in April 2019, was a paradigm shift not just in scientific imaging, but also in the cultural appreciation of the unknown. Its realisation demanded a global technological collaboration on hitherto unseen scales and also the application of new and rigorous forms of objectivity. This text discusses how complex and esoteric planet-wide scientific apparatus and observations at the cutting edge of fundamental science demand a heightened awareness of objectivity and the implementation of transdisciplinarity.

scholarly journals Frequency comb-based multidimensional coherent spectroscopy

2019 ◽  
Vol 205 ◽  
pp. 03017
Author(s):  
T. Cundiff Steven ◽  
Bachana Lomsadze
Keyword(s):  
Long Range ◽  
Frequency Comb ◽  
Heterodyne Detection ◽  
Atomic Vapor ◽  
Frequency Combs ◽  
Dipole Interactions ◽  
Coherent Spectroscopy

We present multidimensional coherent spectroscopy that utilizes frequency combs and multi-heterodyne detection. We demonstrate its capability to measure collective hyperfine resonances in atomic vapor induced by long-range dipole-dipole interactions.

Plastic Deformation in Microtomed Sections

1971 ◽  
Vol 29 ◽  
pp. 458-459
Author(s):  
J. Temple Black
Keyword(s):  
Plastic Deformation ◽  
Plastic Strain ◽  
Applied Stress ◽  
Elastic Strain ◽  
High Strain ◽  
Tool Material ◽  
Cutting Edge ◽  
Material Structure ◽  
Geometrical Constraints

The output of the ultramicrotomy process with its high strain levels is dependent upon the input, ie., the nature of the material being machined. Apart from the geometrical constraints offered by the rake and clearance faces of the tool, each material is free to deform in whatever manner necessary to satisfy its material structure and interatomic constraints. Noncrystalline materials appear to survive the process undamaged when observed in the TEM. As has been demonstrated however microtomed plastics do in fact suffer damage to the top and bottom surfaces of the section regardless of the sharpness of the cutting edge or the tool material. The energy required to seperate the section from the block is not easily propogated through the section because the material is amorphous in nature and has no preferred crystalline planes upon which defects can move large distances to relieve the applied stress. Thus, the cutting stresses are supported elastically in the internal or bulk and plastically in the surfaces. The elastic strain can be recovered while the plastic strain is not reversible and will remain in the section after cutting is complete.

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