scholarly journals Polarization calibration techniques and scheduling for the Daniel K. Inouye Solar Telescope

2014 ◽  
Vol 10 (S305) ◽  
pp. 102-107
Author(s):  
David F. Elmore
Keyword(s):  
Advanced Technology ◽  
Optical Coatings ◽  
Calibration Error ◽  
Solar Telescope ◽  
Critical Importance ◽  
Common Path ◽  
Solar Research ◽  
Telescope Optics ◽  
The Individual ◽  
Calibration Techniques

AbstractThe Daniel K. Inouye Solar Telescope (DKIST), formerly Advanced Technology Solar Telescope when it begins operation in 2019 will be by a significant margin Earth's largest solar research telescope. Science priorities dictate an initial suite of instruments that includes four spectro-polarimeters. Accurate polarization calibration of the individual instruments and of the telescope optics shared by those instruments is of critical importance. The telescope and instruments have been examined end-to-end for sources of polarization calibration error, allowable contributions from each of the sources quantified, and techniques identified for calibrating each of the contributors. Efficient use of telescope observing time leads to a requirement of sharing polarization calibrations of common path telescope components among the spectro-polarimeters and for those calibrations to be repeated only as often as dictated by degradation of optical coatings and instrument reconfigurations. As a consequence the polarization calibration of the DKIST is a facility function that requires facility wide techniques.

A Comprehensive Synthesis of Theories of Mobile Shopping Adoption and Narrative Review

2021 ◽  
Vol 11 (2) ◽  
pp. 52-74
Author(s):  
Rajat Gera ◽  
Priyanka Chadha ◽  
Shirin Alavi
Keyword(s):  
Distribution Channel ◽  
Narrative Review ◽  
Advanced Technology ◽  
Future Research ◽  
Theoretic Approach ◽  
Individual Level ◽  
Theoretical Approaches ◽  
Mobile Shopping ◽  
Future Research Directions ◽  
The Individual

This paper aims to synthesize and integrate the existing literature on MSA adoption and provide directions for future research through narrative review by classifying and organizing the accumulated knowledge into a thematic framework. The paper's theoretical, conceptual approaches, and results were organized into three themes: online distribution channel (theoretical approaches and antecedent factors of MSA adoption, consumer characteristics), advanced technology for in-store shopping (marketing aspects of MSA), and technology perspectives (technology aspects of MSA). The 25 theories of mobile shopping app (MSA) adoption and usage (at the individual level) from 22 reviewed papers were summarized, defined, and mapped with authors. Research questions have been proposed for theories used in reviewed papers and new theories. MSA adoption is at an emergent stage of evolution with fragmentation of theoretical and methodological approaches. While theories of technology adoption and behavioral intentions have been used predominantly, most studies have adopted a multi-theoretic approach or have extended/modified the model with hedonic, situational, and behavioral constructs. The findings related to consumer characteristics of MSA adoption, anchor constructs, moderator and mediator variables, and marketing and technology features of MSA are synthesized and organized according to the themes. Theoretical and practical implications are drawn, research limitations are identified, and future research directions are suggested.

WHY ARE TWINS DISSIMILAR?

PEDIATRICS ◽  
1964 ◽  
Vol 33 (3) ◽  
pp. 325-326
Author(s):  
SHIRLEY G. DRISCOLL
Keyword(s):  
Clinical Observation ◽  
Critical Importance ◽  
Nature And Nurture ◽  
The Individual ◽  
Monozygous Twins

TWINNING has captured the imaginations of artist, story-teller, and scientist throughout recorded history. Many studies of the intrapair likenesses and differences of twins have been directed toward elucidation of the interplay between nature and nurture. Yet the dissimilarities which occur within twin pairs may not be recognized and the mechanisms which underlie these differences often are not understood. Indeed, clinical observation of discordance between cotwins seems to evoke surprise, especially when such dissimilarities are evident at birth and in monozygous twins. In terms of the health and survival of the twins, these phenomena may be of critical importance. How do these differences arise? Dissimilarities between dizygous twins are to be expected, reflecting the individual genetic heritage of two siblings, as they evolve contemporaneously.

How to Reduce Recidivism

2021 ◽  
pp. 144-154
Author(s):  
Kevin A. Wright
Keyword(s):  
Criminal Justice ◽  
Criminal Justice System ◽  
Criminal Behavior ◽  
Justice System ◽  
Critical Importance ◽  
The Individual ◽  
Basic Level

Nearly everyone sent to prison will one day return to the community. This means that understanding recidivism is of critical importance to members of that community. At the most basic level, recidivism can be defined as “the reversion of an individual to criminal behavior after he or she has been convicted of a prior offense, sentenced, and (presumably) corrected.” Recidivism therefore requires that some sort of involvement with the criminal justice system has taken place, and that then the individual again comes into contact with the system after additional transgressions. Recidivism, in other words, is officially detected, repeat unlawful behavior.

scholarly journals Science of the Vatican Observatory since 2000

2020 ◽  
Vol 7 (2) ◽  
pp. 282-298
Author(s):  
Guy Consolmagno, S.J.
Keyword(s):  
Scientific Work ◽  
Advanced Technology ◽  
Research Programs ◽  
Research Areas ◽  
Stellar Astronomy ◽  
University Of Arizona ◽  
To Come ◽  
The Individual ◽  
The University

Five research areas have been the focus of the scientific work of the Specola Vaticana (Vatican Observatory) over the past twenty years: planetary sciences, stellar astronomy, extragalactic astronomy, cosmology, and the development of the Vatican Advanced Technology Telescope (vatt). The choice of research program is left to the individual astronomers, all of whom work closely with lay collaborators around the world. Notable, especially in connection with the vatt, is the close coordination of the Specola with the Steward Observatory of the University of Arizona. One unique strength of the Specola is its independence from short-term funding requirements. As a result of its stable funding, Specola astronomers can engage in long-term research programs such as surveys of meteorite properties, exoplanets, stellar clusters, and galaxy clusters, which may take ten or more years to come to fruition. In this way the Specola complements the large research programs of contemporary astronomy.

Dynamics of moving knots in a solar prominence observed by New Vacuum Solar Telescope

2020 ◽  
Author(s):  
Yi Bi
Keyword(s):  
Optical Flow ◽  
Image Matching ◽  
Medical Image ◽  
Solar Surface ◽  
Image Plane ◽  
Solar Telescope ◽  
Solar Prominence ◽  
Horizontal Magnetic Field ◽  
Morphological Approach ◽  
Solar Research

<p>In this report, we present a prominence observed by New Vacuum Solar Telescope (NVST) in Hα wavelength.  We use morphological approach to identify the rising or descending knots in the prominence. The rising knots are often found on the top of the prominence, while more knots are seen to descend from anywhere of the prominence.</p><p>The optical flow, referring to the apparent proper motion of a feature across the image plane, may be used to determine the velocity field from two images. The technique of local correlation tracking (LCT) optical flow has been widely used in the solar research. The Demon algorithm, which has been  used to match medical image, performs image-to-image matching by determining the optical flow between two images. We have examined the performance of the two methods applying the Hα images, and we noted that the Demon algorithm outperforms traditional LCT  methods.</p><p>The result of Demon optical flow allows us to estimate the velocity and acceleration of the moving knots. The descending speed of the knots near the solar surface is higher than that far away from the solar surface. This indicate that most of knots are more possible to descend across the horizontal magnetic field.</p>

Advanced Technology Solar Telescope: a progress report

2008 ◽  
Author(s):  
J. Wagner ◽  
T. R. Rimmele ◽  
S. Keil ◽  
R. Hubbard ◽  
E. Hansen ◽  
...  
Keyword(s):  
Progress Report ◽  
Advanced Technology ◽  
Solar Telescope

The Advanced Technology Solar Telescope mount assembly

2006 ◽  
Author(s):  
Mark Warner ◽  
Myung Cho ◽  
Bret Goodrich ◽  
Eric Hansen ◽  
Rob Hubbard ◽  
...  
Keyword(s):  
Advanced Technology ◽  
Solar Telescope

The Advanced Technology Solar Telescope enclosure

2006 ◽  
Author(s):  
L. Phelps ◽  
J. Barr ◽  
N. Dalrymple ◽  
M. Fraser ◽  
R. Hubbard ◽  
...  
Keyword(s):  
Advanced Technology ◽  
Solar Telescope
Sign in / Sign up

Export Citation Format

Share Document