Limiting degree of polarization of a nonmonochromatic radiation propagating in a fiber guide with random inhomogeneities

AbstractHigh resolution images, obtained during July 11, 1991 total solar eclipse, allowed us to estimate the degree of solar corona polarization in the light of FeXIV 530.3 nm emission line and in the white light, as well. Very preliminary analysis reveals remarkable differences in the degree of polarization for both sets of data, particularly as for level of polarization and its distribution around the Sun’s limb.

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At the Simla Conference and in the General Elections

10.1093/oso/9780199467099.003.0012 ◽

2018 ◽

Author(s):

J.S. Grewal

Keyword(s):

Large Degree ◽

Large Majority ◽

Degree Of Polarization ◽

Considerable Proportion ◽

Executive Council ◽

Crucial Importance ◽

The Future ◽

General Elections ◽

The Right

On Lord Wavell’s initiative, the Simla Conference was held to discuss the proposal of a new executive council and a new constitution for India after the war. Master Tara Singh represented the Sikh community at the Simla Conference. The Conference failed due to Jinnah’s insistence that the Muslim League alone had the right to nominate Muslim representatives on the Executive Council. The failure of the Conference made the general elections of 1945–6 all the more important. The general elections resulted in a large degree of polarization between the Hindus, Muslims, and Sikhs. The Muslim League got Muslim mandate in favour of Pakistan. The Congress got a mandate of Hindus and a considerable proportion of the Sikhs for independence without partition. The Akalis got support of the large majority of the Sikhs for an independent political entity of the Sikhs. This polarization was of crucial importance for the future.

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RoboPol: AGN polarimetric monitoring data

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/staa3777 ◽

2020 ◽

Author(s):

D Blinov ◽

S Kiehlmann ◽

V Pavlidou ◽

G V Panopoulou ◽

R Skalidis ◽

...

Keyword(s):

Active Galactic Nuclei ◽

Galactic Nuclei ◽

Average Degree ◽

Monitoring Data ◽

Degree Of Polarization ◽

Time Interval ◽

Current Version ◽

Variability Index ◽

Entire Dataset

Abstract We present uniformly reprocessed and re-calibrated data from the RoboPol programme of optopolarimetric monitoring of active galactic nuclei (AGN), covering observations between 2013, when the instrument was commissioned, and 2017. In total, the dataset presented in this paper includes 5068 observations of 222 AGN with Dec > −25○. We describe the current version of the RoboPol pipeline that was used to process and calibrate the entire dataset, and we make the data publicly available for use by the astronomical community. Average quantities summarising optopolarimetric behaviour (average degree of polarization, polarization variability index) are also provided for each source we have observed and for the time interval we have followed it.

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Bionic Integrated Positioning Mechanism Based on Bioinspired Polarization Compass and Inertial Navigation System

Sensors ◽

10.3390/s21041055 ◽

2021 ◽

Vol 21 (4) ◽

pp. 1055

Author(s):

Qingyun Zhang ◽

Jian Yang ◽

Panpan Huang ◽

Xin Liu ◽

Shanpeng Wang ◽

...

Keyword(s):

Navigation System ◽

Inertial Navigation System ◽

Inertial Navigation ◽

System Model ◽

Degree Of Polarization ◽

Positioning System ◽

Integration Model ◽

Position Errors ◽

Model Combining ◽

Polarization Compass

In this paper, to address the problem of positioning accumulative errors of the inertial navigation system (INS), a bionic autonomous positioning mechanism integrating INS with a bioinspired polarization compass is proposed. In addition, the bioinspired positioning system hardware and the integration model are also presented. Concerned with the technical issue of the accuracy and environmental adaptability of the integrated positioning system, the sun elevation calculating method based on the degree of polarization (DoP) and direction of polarization (E-vector) is presented. Moreover, to compensate for the latitude and longitude errors of INS, the bioinspired positioning system model combining the polarization compass and INS is established. Finally, the positioning performance of the proposed bioinspired positioning system model was validated via outdoor experiments. The results indicate that the proposed system can compensate for the position errors of INS with satisfactory performance.

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When elites polarize over polarization: Framing the polarization debate in Turkey – RETRACTED

New Perspectives on Turkey ◽

10.1017/npt.2018.22 ◽

2018 ◽

Vol 59 ◽

pp. 109-133

Author(s):

Senem Aydın-Düzgit ◽

Evren Balta

Keyword(s):

Civil Society ◽

Qualitative Interviews ◽

Radical Change ◽

The State ◽

Considerable Degree ◽

Institutional Factors ◽

Degree Of Polarization ◽

State Of Polarization ◽

The Government ◽

Near Future

AbstractThis article aims to explore the views of the Turkish elite on the state of polarization in Turkey. By identifying four political frames—namely, harmony, continuity/decline, conspiracy, and conflict—that selected Turkish political and civil society elites use in discussing the phenomenon of polarization in the country through their contributions to a workshop and in-depth qualitative interviews, the article finds that there is a considerable degree of polarization among the Turkish elite regarding their views on the presence of polarization in Turkey. Moreover, this overlaps with the divide between the government and the opposition in the country. An analysis of the justificatory arguments employed in constituting the aforementioned frames shows that, while those elites who deny the existence of polarization seek its absence in essentialist characteristics of society, in reductionist comparisons with history, or in internal/external enemies, those who acknowledge polarization’s presence look for its roots in political and institutional factors and processes. The article highlights how, given the denial of polarization by the pro-government elite and the substantial gap between the two camps’ justificatory narratives, the currently reported high rates of polarization in Turkey can, at best, be expected to remain as is in the near future, barring a radical change in political constellations.

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