Theoretical condition for transparency in mesoporous layered optical media: Application to switching of hygrochromic coatings

2014 ◽  
Vol 104 (2) ◽  
pp. 023704 ◽  
Author(s):  
O. Deparis ◽  
M. N. Ghazzal ◽  
P. Simonis ◽  
S. Mouchet ◽  
H. Kebaili ◽  
...  
Keyword(s):  
Optical Media ◽  
Theoretical Condition

Modelling Light Transmission in a Fiber-Optical Reflection System

2004 ◽  
Vol 9 (1) ◽  
pp. 55-63
Author(s):  
V. Kleiza
Keyword(s):  
Optical Sensors ◽  
Light Transmission ◽  
External Cavity ◽  
Linear Displacement ◽  
Fiber System ◽  
Light Emitting ◽  
Optical Media ◽  
Reflected Light ◽  
Fiber Optical ◽  
Fiber Optical Sensors

Light transmission in the reflection fiber system, located in external optical media, has been investigated for application as sensors. The system was simulated by different models, including external cavity parameters such as the distance between light emitting and receiving fibers and mirror positioning distance. The sensitivity to a linear displacement of the sensors was studied as a function of the distance between the tips of the light emitting fiber and the center of the pair reflected light collecting fibers, by positioning a mirror. Physical fundamentals and operating principles of the advanced fiber optical sensors were revealed.

Cataract. Diagnostic errors at referring patients to surgery

2020 ◽  
Author(s):  
V.V. Egorov ◽  
◽  
E.L. Sorokin ◽  
G.P. Smoliakova ◽  
O. V. Kolenko ◽  
...  
Keyword(s):  
Clinical Diagnosis ◽  
Diagnostic Errors ◽  
Ophthalmological Examination ◽  
Slit Lamp ◽  
Critical View ◽  
Optical Media

The textbook examines the most common diagnostic errors of ophthalmologists when making a clinical diagnosis of "cataract". Clinical examples point to a more critical view of the cataract diagnosis. Due to the fact that most of the errors are based on a superficial examination of the eye, clear recommendations are given for conducting a clinical ophthalmological examination of cataracts. At the same time, special attention is paid to the types of examination of the lens with the help of a slit lamp, to the peculiarities of performing various types of ophthalmoscopy with moderate opacity of optical media.

Magnetic Emulsions as Prospective Magneto-Optical Media

2021 ◽  
pp. 1-1
Author(s):  
Constantine Yerin ◽  
Sergey Belykh
Keyword(s):  
Optical Media

Above the Action: The Cultural Politics of Watching Dota 2

2020 ◽  
Author(s):  
Jessica Elam ◽  
Nick Taylor
Keyword(s):  
Cultural Politics ◽  
Live Streaming ◽  
First Person ◽  
Game Play ◽  
Optical Media ◽  
Competitive Game ◽  
Active Camera

Abstract The rise of live-streaming platforms, and the related surge in popularity of esports, remind us that there is a politics of watching play. This article extends intensified scholarly interest in game spectatorship, offering a materialist consideration of the embodied work involved in spectating competitive game play. Most readily associated with the discursive alignments between competitive gaming and/as sport, the active camera mode used by esports competitors and “shoutcasters” facilitates analyzing the highly kinetic action of team-based combat in first-person shooters and multiplayer online battle arenas. Here, we draw from microanalyses of audio-visual recordings taken as individual participants spectated a Dota 2 match. Examining the cognitive and perceptual competencies they draw from, we argue that participants are incorporated into apparatuses of perception associated with militarized optical media. While at a discursive level esports spectators may be watching sports, at a material level they are playing with the logics of drones.

Triple‐layered NdCo amorphous‐alloy films for magneto‐optical media

1991 ◽  
Vol 69 (8) ◽  
pp. 4761-4763 ◽  
Author(s):  
Hideo Iiyori ◽  
Shinji Takayama
Keyword(s):  
Amorphous Alloy ◽  
Alloy Films ◽  
Optical Media

Theoretical Condition for the Cxy=Cyx Relation in Fluid Film Journal Bearings

1989 ◽  
Vol 111 (3) ◽  
pp. 426-429 ◽  
Author(s):  
T. Kato ◽  
Y. Hori
Keyword(s):  
Reynolds Equation ◽  
Journal Bearing ◽  
Journal Bearings ◽  
Fluid Film ◽  
Finite Width ◽  
Damping Coefficients ◽  
Dynamic Coefficients ◽  
Cross Terms ◽  
Linear Damping ◽  
Theoretical Condition

A computer program for calculating dynamic coefficients of journal bearings is necessary in designing fluid film journal bearings and an accuracy of the program is sometimes checked by the relation that the cross terms of linear damping coefficients of journal bearings are equal to each other, namely “Cxy = Cyx”. However, the condition for this relation has not been clear. This paper shows that the relation “Cxy = Cyx” holds in any type of finite width journal bearing when these are calculated under the following condition: (I) The governing Reynolds equation is linear in pressure or regarded as linear in numerical calculations; (II) Film thickness is given by h = c (1 + κcosθ); and (III) Boundary condition is homogeneous such as p=0 or dp/dn=0, where n denotes a normal to the boundary.

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