Dynamic Observation of Topological Soliton States in a Programmable Nanomechanical Lattice

Nano Letters ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 1025-1031
Author(s):  
Shaochun Lin ◽  
Liang Zhang ◽  
Tian Tian ◽  
Chang-Kui Duan ◽  
Jiangfeng Du
Author(s):  
Akira Tonomura

Electron holography is a two-step imaging method. However, the ultimate performance of holographic imaging is mainly determined by the brightness of the electron beam used in the hologram-formation process. In our 350kV holography electron microscope (see Fig. 1), the decrease in the inherently high brightness of field-emitted electrons is minimized by superposing a magnetic lens in the gun, for a resulting value of 2 × 109 A/cm2 sr. This high brightness has lead to the following distinguished features. The minimum spacing (d) of carrier fringes is d = 0.09 Å, thus allowing a reconstructed image with a resolution, at least in principle, as high as 3d=0.3 Å. The precision in phase measurement can be as high as 2π/100, since the position of fringes can be known precisely from a high-contrast hologram formed under highly collimated illumination. Dynamic observation becomes possible because the current density is high.


1997 ◽  
Author(s):  
Nobuyuki Abe ◽  
Yasushi Kunugita ◽  
Masakazu Hayashi ◽  
Yoshiaki Tsuchitani

GlaucomaNews ◽  
2020 ◽  
pp. 62-65
Author(s):  
А.Y. Kazantseva ◽  
◽  
O.A. Rumyantseva ◽  

Purpose. To evaluate the effectiveness of surgical resection of the sclera in patients with primary open-angle and secondary glaucoma. Materials and methods. The study included 84 patients with POAG and SG stages III-IV and decompensated IOP level (not higher than 32 mm Hg). In order to normalize the increased ophthalmotonus, a non - penetrating operation was performed-surgical resection of the sclera (SRS). The patients underwent complex ophthalmological examination and dynamic observation. Result. In the studied groups of patients after surgical treatment there was a decrease in elevated IOP levels by 33.42%, an improvement in the coefficient of ease of outflow and a weakening of the hypotensive regime. Stabilization of visual functions was observed in all patients. Summary. The proposed new SRS technique provides a smooth decrease in IOP, preservation of visual functions and is not accompanied by intra-and postoperative complications. Key words: primary open-angle glaucoma, surgical resection of sclera, secondary glaucoma, uveoscleral outflow pathway (USPO), intraocular pressure, EO coefficient .


2020 ◽  
Vol 2 (3) ◽  
Author(s):  
L. Timm ◽  
H. Weimer ◽  
L. Santos ◽  
T. E. Mehlstäubler

1988 ◽  
Vol 38 (10) ◽  
pp. 3226-3230 ◽  
Author(s):  
Norman K. Glendenning ◽  
Takeshi Kodama ◽  
Frans R. Klinkhamer
Keyword(s):  

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