4x3 Mueller matrix imager for cervical health diagnosis

2021 ◽  
Author(s):  
Mariacarla Gonzalez ◽  
Jessica Ramella-Roman
Keyword(s):  
Mueller Matrix ◽  
Health Diagnosis

Checking the Mueller matrix

1999 ◽  
Author(s):  
D. Look, Jr.
Keyword(s):  
Mueller Matrix

The mental health of Australian medical practitioners during Covid-19

2021 ◽  
pp. 103985622110108
Author(s):  
Michelle Anne Adams ◽  
Matthew Brazel ◽  
Richard Thomson ◽  
Hannah Lake
Keyword(s):  
Mental Health ◽  
Junior Doctor ◽  
Demographic Factors ◽  
Cross Sectional Survey ◽  
Mental Health Diagnosis ◽  
Cross Sectional ◽  
Medical Practitioners ◽  
Psychological Distress Scale ◽  
Distress Scale ◽  
Health Diagnosis

Objectives: To ascertain whether doctors were experiencing higher rates of distress during Covid-19 and whether this was impacted by demographic factors. Our hypotheses were that being a junior doctor, having a previous mental health diagnosis and treating Covid-19 positive patients would predict higher rates of distress. Methods: Cross-sectional survey conducted via Survey Monkey. Voluntary participants were recruited from the mailing list of a national-based referral service for doctors to psychiatrists. Distress was measured using the Kessler Psychological Distress Scale (K10). Demographic factors were analysed for predictive value of a higher rating on the K10. Areas of concern in relation to Covid-19 and preference for support services were measured on a Likert scale and compared to levels of distress. Results: The rate of very high distress was 15%. Being a junior doctor and having a previous mental health diagnosis were predictive factors of a higher K10 score. K10 was not affected by likelihood of contact with Covid-19-positive patients. Social isolation had a larger impact on mental health in the context of a previous psychiatric diagnosis. Face-to-face assessments were preferred. Conclusions: Rates of distress in doctors have been higher than baseline during Covid-19. Some groups have been particularly vulnerable.

scholarly journals Experimental validation of depolarizing Mueller matrix model via ex vivo colon samples

2021 ◽  
Vol 1859 (1) ◽  
pp. 012042
Author(s):  
Deyan Ivanov ◽  
Ekaterina Borisova ◽  
Tatiana Novikova ◽  
Razvigor Ossikovski
Keyword(s):  
Matrix Model ◽  
Experimental Validation ◽  
Ex Vivo ◽  
Mueller Matrix

Polarimetry of soil and vegetation in the visible II: Mueller matrix decompositions

2021 ◽  
pp. 107622
Author(s):  
Sergey N. Savenkov ◽  
Alexander A. Kohkanovsky ◽  
Evgen A. Oberemok ◽  
Ivan S. Kolomiets ◽  
Alexander S. Klimov
Keyword(s):  
Mueller Matrix ◽  
Matrix Decompositions

scholarly journals Universal Synthesizer of Mueller Matrices Based on the Symmetry Properties of the Enpolarizing Ellipsoid

Symmetry ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 983
Author(s):  
José J. Gil ◽  
Ignacio San José
Keyword(s):  
Mathematical Structure ◽  
Mueller Matrix ◽  
Morphological Properties ◽  
Nondestructive Analysis ◽  
Structural Decomposition ◽  
Symmetry Properties ◽  
Mueller Matrices ◽  
Scattering Measurement ◽  
The Way

Polarimetry is today a widely used and powerful tool for nondestructive analysis of the structural and morphological properties of a great variety of material samples, including aerosols and hydrosols, among many others. For each given scattering measurement configuration, absolute Mueller polarimeters provide the most complete polarimetric information, intricately encoded in the 16 parameters of the corresponding Mueller matrix. Thus, the determination of the mathematical structure of the polarimetric information contained in a Mueller matrix constitutes a topic of great interest. In this work, besides a structural decomposition that makes explicit the role played by the diattenuation-polarizance of a general depolarizing medium, a universal synthesizer of Muller matrices is developed. This is based on the concept of an enpolarizing ellipsoid, whose symmetry features are directly linked to the way in which the polarimetric information is organized.

scholarly journals Optical Chirality Determined from Mueller Matrices

2021 ◽  
Vol 11 (15) ◽  
pp. 6742
Author(s):  
Hans Arwin ◽  
Stefan Schoeche ◽  
James Hilfiker ◽  
Mattias Hartveit ◽  
Kenneth Järrendahl ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Constitutive Relations ◽  
Mueller Matrix ◽  
Optical Path ◽  
Electromagnetic Modeling ◽  
Structural Effects ◽  
Polarization Effects ◽  
Optical Chirality ◽  
Mueller Matrices ◽  
Circular Dichroïsm

Optical chirality, in terms of circular birefringence and circular dichroism, is described by its electromagnetic and magnetoelectric material tensors, and the corresponding optical activity contributes to the Mueller matrix. Here, spectroscopic ellipsometry in the spectral range 210–1690 nm is used to address chiral phenomena by measuring Mueller matrices in transmission. Three approaches to determine chirality parameters are discussed. In the first approach, applicable in the absence of linear polarization effects, circular birefringence and circular dichroism are evaluated directly from elements of a Mueller matrix. In the second method, differential decomposition is employed, which allows for the unique separation of chirality parameters from linear anisotropic parameters as well as from depolarization provided that the sample is homogeneous along the optical path. Finally, electromagnetic modeling using the Tellegen constitutive relations is presented. The last method also allows structural effects to be included. The three methods to quantify optical chirality are demonstrated for selected materials, including sugar solutions, α-quartz, liquid crystals, beetle cuticle, and films of cellulose nanocrystals.

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