Preparing the GREGOR solar telescope for night-time use: Deriving a pointing model

The objective of this study was to evaluate the inclusion of different levels of 0.0%; 0.7%; 1.4% and 2.1% of Noni (Morinda citrifolia) in the feeding of lambs regarding ingestive behavior and physiological variables. The experiment was carried out in a double Latin (4x4) experimental design with eight animals, consisting of four periods and four experimental rations. Eight lambs with no defined racial pattern were used, with mean initial body weight (BW) of 23.74 ± 1.00 kg. The ingestive behavior was performed during 24 hours, always on the last day of each experimental period. The physiological variables and the environmental variables were measured during three days of each period. Data were submitted for analysis of variance and, when significant, regression equation was applied at 5% of probability. Statistical analysis was performed considering the subdivision of the plot, which consisted of the diurnal and nocturnal evaluation times for the ingestive behavior and the morning and afternoon periods for the physiological variables. The inclusion of Noni in fed lambs did not change (p > 0.05) the time spent with ingestive behaviors for dry matter intake (DMI), rumination (RUM), idleness (IDL), water intake (WIN) and other activity (OAC). However, the daytime During the period there was gr eater (p < 0.05) time use for DMI, WIN and OAC. Inclusion of Noni to diets provided higher (p > 0.05) time use during the night time for RUM and IDL. The physiological variables were not influenced (p > 0.05) by the inclusion of Noni in the diets of lambs. However, higher mean (p < 0.05) body temperature of the front and rear, rectal temperature and respiratory rate of the lambs were observed during the afternoon. The inclusion of up to 2.1% of Noni in lamb feed does not alter ingestive behavior and physiological variables. However, the consumption of dry matter and water is higher during the diurnal period, while rumination and idleness are more active during the night period.

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The Indian National Large Solar Telescope (NLST)

Proceedings of the International Astronomical Union ◽

10.1017/s1743921309993206 ◽

2009 ◽

Vol 5 (S264) ◽

pp. 499-504 ◽

Cited By ~ 2

Author(s):

S. S. Hasan

Keyword(s):

Water Vapor ◽

High Resolution ◽

Adaptive Optics ◽

State Of The Art ◽

Indian Institute ◽

Solar Telescope ◽

Concept Design ◽

Night Time ◽

Innovative Design ◽

Instrumental Polarization

AbstractThe Indian National Large Solar Telescope (NLST) will be a state-of-the-art 2-m class telescope for carrying out high resolution studies of the solar atmosphere. Sites in the Himalayan region at altitudes greater than 4000-m that have extremely low water vapor content and are unaffected by monsoons are under evaluation. This project is led by the Indian Institute of Astrophysics and has national and international partners.NLST is an on-axis alt-azimuth Gregorian multi-purpose open telescope with the provision of carrying out night time stellar observations using a spectrograph. The telescope utilizes an innovative design with low number of reflections to achieve a high throughput and low instrumental polarization. High order adaptive optics is integrated into the design that works with a modest Fried's parameter of 7-cm to give diffraction limited performance. The telescope will be equipped with a suite of post-focus instruments including a high resolution spectrograph and a polarimeter. A detailed concept design of the telescope is presently being finalized and fabrication is expected to begin in 2010 with first light in 2014.

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Processed data on the night-time use of screen-based media devices and adolescents' sleep quality and health-related quality of life

Data in Brief ◽

10.1016/j.dib.2019.103761 ◽

2019 ◽

Vol 23 ◽

pp. 103761 ◽

Cited By ~ 1

Author(s):

Michael O. Mireku ◽

Mary M. Barker ◽

Julian Mutz ◽

Chen Shen ◽

Iroise Dumontheil ◽

...

Keyword(s):

Quality Of Life ◽

Sleep Quality ◽

Time Use ◽

Health Related Quality ◽

Night Time ◽

Related Quality ◽

Health Related

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MuSICa: THE MULTI-SLIT IMAGE SLICER FOR THE EST SPECTROGRAPH

Journal of Astronomical Instrumentation ◽

10.1142/s2251171713500098 ◽

2013 ◽

Vol 02 (01) ◽

pp. 1350009 ◽

Cited By ~ 18

Author(s):

A. CALCINES ◽

R. L. LÓPEZ ◽

M. COLLADOS

Keyword(s):

Solar Physics ◽

Optical Quality ◽

Field Of View ◽

Solar Telescope ◽

Night Time ◽

Integral Field Spectroscopy ◽

Integral Field Spectrograph ◽

Design Options ◽

New Generation ◽

Integral Field

Integral field spectroscopy (IFS) is a technique that allows one to obtain the spectra of all the points of a bidimensional field of view simultaneously. It is being applied to the new generation of the largest night-time telescopes but it is also an innovative technique for solar physics. This paper presents the design of a new image slicer, MuSICa (Multi-Slit Image slicer based on collimator-Camera), for the integral field spectrograph of the 4-m aperture European Solar Telescope (EST). MuSICa is a multi-slit image slicer that decomposes an 80 arcsec2 field of view into slices of 50 μm and reorganizes it into eight slits of 0.05 arcsec width × 200 arcsec length. It is a telecentric system with an optical quality at diffraction limit compatible with the two modes of operation of the spectrograph: spectroscopic and spectro-polarimetric. This paper shows the requirements, technical characteristics and layout of MuSICa, as well as other studied design options.

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Lifestyle and Mental Health Disruptions During COVID-19

10.31235/osf.io/y4xn3 ◽

2020 ◽

Author(s):

Giovanni Giuntella ◽

Kelly Hyde ◽

Silvia Saccardo ◽

Sally Sadoff

Keyword(s):

Mental Health ◽

Physical Activity ◽

Time Use ◽

Well Being ◽

Sleep Time ◽

Policy Intervention ◽

Night Time ◽

Steps Per Day ◽

Mental Well Being ◽

Longitudinal Dataset

COVID-19 has affected daily life in unprecedented ways. Using a longitudinal dataset linking biometric and survey data from several cohorts of young adults before and during the pandemic (N=685), we document large disruptions to physical activity, sleep, time use, and mental health. At the onset of the pandemic, average steps decline from 9,400 to 4,600 steps per day, sleep increases by about 25-30 minutes per night, time spent socializing declines by over half to less than 30 minutes, and screen time more than doubles to over 5 hours per day. The proportion of participants at risk of clinical depression increases to 65%, over twice the rate in the same population prior to the pandemic. Our analyses suggest that disruption to physical activity is a leading risk factor for depression during the pandemic. However, restoration of those habits--either naturally or through policy intervention--has limited impact on restoring mental well-being.

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Sleep and Night-time Use of Electronic Entertainment and Communication Devices in the Bedroom as Risk Factors for Obesity Among Canadian Children

PsycEXTRA Dataset ◽

10.1037/e510042013-001 ◽

2012 ◽

Author(s):

Paul Veugelers ◽

Christina Fung ◽

Harneet Chahal ◽

Stefan Kuhle

Keyword(s):

Risk Factors ◽

Time Use ◽

Night Time ◽

Communication Devices

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Availability and night-time use of electronic entertainment and communication devices are associated with short sleep duration and obesity among Canadian children

Pediatric Obesity ◽

10.1111/j.2047-6310.2012.00085.x ◽

2012 ◽

Vol 8 (1) ◽

pp. 42-51 ◽

Cited By ~ 109

Author(s):

H. Chahal ◽

C. Fung ◽

S. Kuhle ◽

P. J. Veugelers

Keyword(s):

Sleep Duration ◽

Time Use ◽

Short Sleep Duration ◽

Night Time ◽

Short Sleep ◽

Communication Devices

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Photosynthetically stimulated bioerosion in symbiotic sponges: the role of glycerol and oxygen

Coral Reefs ◽

10.1007/s00338-021-02091-0 ◽

2021 ◽

Author(s):

Michelle Achlatis ◽

Rene M. van der Zande ◽

Alice E. Webb ◽

Didier M. de Bakker ◽

Lennart J. de Nooijer ◽

...

Keyword(s):

Time Use ◽

Current Knowledge ◽

Oxygen Production ◽

Night Time ◽

Saturation State ◽

Physiological Conditions ◽

Spatial Isolation ◽

Host Sponge ◽

Sufficient Oxygen

AbstractOn coral reefs, some of the most aggressive calcium carbonate eroders are dinoflagellate-hosting sponges of the genus Cliona. Like in other marine taxa, the influence of these symbiotic microorganisms on the metabolism of the host sponge, and thereby on erosion of the surrounding ecosystem, is increasingly acknowledged. Despite elevating pH (and hence carbonate saturation state), dinoflagellate photosynthesis promotes bioerosion by their hosts. This paradox might be solved by a spatial isolation of photosynthesis from carbonate dissolution, but it remains unknown which mechanism connects the dinoflagellates’ photosynthesis with the sponge’s bioerosion. Here, we simulate the outcomes of photosynthesis in two separate ways, namely as production of carbon-rich compounds (in this case glycerol) and as an increase in oxygen content. This allows testing their potential to enhance bioerosion rates of sponge holobionts that were preconditioned under variable photosynthetic regimes. We find that glycerol, a commonly shared photosynthate in marine symbioses, stimulates chemical bioerosion rates in the dark of photosynthetically impaired sponges. Chemical bioerosion was all the more limited by availability of sufficient oxygen, while the combination of added glycerol and oxygen boosted chemical bioerosion rates. We argue that under normal physiological conditions, bioerosion is promoted by both organic carbon and oxygen production, and we provide evidence for the storage of photosynthates for night-time use. We further discuss our findings in the context of the current knowledge of the bioerosion mechanism, which we expand by integrating the effects of carbon-rich compounds and oxygen as drivers for bioerosion by Cliona.

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