On a Clear Night: Essays from the Heartland by Marnie O. Mamminga

2019 ◽  
Vol 5 (2) ◽  
pp. 195-197
Author(s):  
Paula M. Nelson
Keyword(s):  
Clear Night

scholarly journals "Stars on a clear night"

2020 ◽  
Vol 3 ◽  
Author(s):  
Narjisse Taouri ◽  
Ouafae Cherkaoui
Keyword(s):  
Clear Night

scholarly journals XXIV. Astronomical observations and experiments tending to investigate the local arrangement of the celestial bodies in space, and to determine the extent and condition of the Milky Way

1817 ◽  
Vol 107 ◽  
pp. 302-331 ◽  
Keyword(s):  
Milky Way ◽  
Two Dimensions ◽  
Three Dimensions ◽  
Heavenly Body ◽  
Astronomical Observations ◽  
Clear Night ◽  
Real Place ◽  
Celestial Object ◽  
Local Arrangement ◽  
Celestial Bodies

The construction of the heavens, in which the real place of every celestial object in space is to be determined, can only be delineated with precision, when we have the situation of each heavenly body assigned in three dimensions, which in the case of the visible universe may be called length, breadth, and depth; or longitude, latitude, and Profundity. The angular positions of the stars and other celestial objects, as they are given in astronomical catalogues, and represented upon globes, or laid down in maps, enable us, in a clear night, to find them by the eye or to view them in a telescope; for, in order to direct an instrument to them, a superficial place consisting of only two dimensions is sufficient; but although the line in which they are to be seen is thus pointed out to us, their distance from the eye in that line remains unknown; and unless a proper method for obtaining the profundity of objects can be found, their longitude and latitude will not enable us to assign their local arrangement in space.

The Contribution of Dew to the Summer Water Budget of Northern Idaho

1961 ◽  
Vol 42 (8) ◽  
pp. 572-581 ◽  
Author(s):  
Merle G. Lloyd
Keyword(s):  
Water Budget ◽  
Forest Canopy ◽  
Expanded Polystyrene ◽  
Monthly Rainfall ◽  
Continuous Recording ◽  
Recording Device ◽  
Vegetative Cover ◽  
Valley Bottom ◽  
Clear Night ◽  
Northern Idaho

Duration and amount of dew under a variety of topographic and vegetative-cover conditions were studied on the Priest River Experimental Forest in northern Idaho during the summer of 1958. Dew was measured by a continuous-recording device that registered the change in weight of an expanded polystyrene (Styrofoam) block. Dew deposits ranged from zero on cloudy, windy nights to a maximum of 0.014 inch during a clear night following a day with rain. Monthly amounts of dew ranged from 7 to 29 per cent of the monthly rainfall. Dew was deposited only on the flat of the Priest River Valley and along the Benton Creek valley bottom. Dew was not deposited under the forest canopy or on the slopes.

An Experiment on the Stability of Superposed Streams of Fluid

1927 ◽  
Vol 23 (6) ◽  
pp. 730-731 ◽  
Author(s):  
G. I. Taylor
Keyword(s):  
Cooling Effect ◽  
Clear Night ◽  
The Stability

It is well known that the calm which commonly comes on a cold clear night is due to the cooling effect of the ground on the lowest layers of the atmosphere. It frequently happens that the wind at a height of a few hundred feet does not die down at all at night; in fact observations taken at the top of the Eiffel tower show that there is frequently a slight increase in wind at that height. The cooling of the air near the ground makes the lower layers heavier than the higher layers and thus tends to prevent the formation of turbulence at the earth's surface. Since it is only through the medium of turbulence that the higher layers are able to drag the lowest layers over the ground the surface air stops moving.

scholarly journals Measuring the Apparent Magnitude of Planet Mars on August 1st and October 2nd, 2018 at the Falak Observatory at Muhammadiyah University of North Sumatera

2020 ◽  
Vol 3 (1) ◽  
pp. 6
Author(s):  
Muhammad Hidayat ◽  
Arwin Juli Rakhmadi ◽  
Abu Yazid Raisal
Keyword(s):  
Celestial Body ◽  
Energy Flux ◽  
Research Methodology ◽  
Apparent Magnitude ◽  
Clear Night ◽  
Night Sky

The Bright stars that were seen by the eyes are the received quantity of the energy flux sent from the celestial body. The energy flux is inversely proportional to the distant quadrant which means that the light of the stars that are visible to our eyes cannot be compared to the actual brightness or even weaker than the others and the visible star lights the apparent magnitude. The purpose of this study is to measure the apparent magnitude of Mars. This research methodology is quantitative, by taking number of images/videos of Mars and then the data is processed by using IRIS software. The results of the analysis is using IRIS software that shows the value of the apparent magnitude of Mars on August 1st, 2018 is (-1.56 ± 0.33) and October 2nd 2018 is (-1.84 ± 0.08). This was taken by selecting the best image result in clear night sky.

scholarly journals A Study on the Night Visibility Evaluation Method of Color Temperature Convertible Automotive Headlamps Considering Weather Conditions

2021 ◽  
Vol 11 (18) ◽  
pp. 8661
Author(s):  
Ho-Joon Kang ◽  
Seong-Jin Kwon
Keyword(s):  
Evaluation Method ◽  
Weather Conditions ◽  
Climatic Conditions ◽  
Light Transmittance ◽  
Color Temperature ◽  
Driving Safety ◽  
Clear Night ◽  
Adverse Weather Conditions ◽  
Adverse Weather ◽  
Bad Weather

This study evaluated a method of applying color temperature convertible headlamps to improve driving safety in adverse weather conditions such as fog and rain during night driving. The concept of color temperature convertible headlamps is to improve the driver’s visibility by driving with a color temperature of 6000 K on a clear night and switching to a color temperature of 3000 K with better light transmittance at night in adverse weather. Through this study, a method for evaluating the night visibility related to such color temperature convertible headlamps under bad weather at night was suggested. To this end, a method of using a facility that can implement weather conditions such as fog and rain was proposed, and evaluation conditions according to the climatic conditions and the distance of pedestrian targets were set and actual tests were conducted.

Experimental Investigation of the Effect of Materials and Their Surface Colours on Nocturnal Cooling

2013 ◽  
Author(s):  
Nnamdi V. Ogueke ◽  
Kevin N. Nwaigwe ◽  
Chidiebere Nwaiwu ◽  
Emmanuel E. Anyanwu
Keyword(s):  
Experimental Investigation ◽  
Relative Humidity ◽  
Temperature Difference ◽  
The Other ◽  
Galvanized Steel ◽  
Ambient Temperatures ◽  
Clear Night ◽  
The Third ◽  
Night Sky

The experimental investigation of the effects of materials and their surface colours on nocturnal cooling is presented. Two materials, galvanized steel and aluminium, were considered. Three plates of each material were used. One was painted black, the other white, while the third was left unpainted. Each of the plates (0.5 × 0.5 m) was used to cover a wooden box of dimension 0.5 × 0.5 × 0.24 m, made of 0.02 m thick plywood, thus producing an air tight arrangement. Six of such boxes were formed in all; three from galvanized steel and three from aluminium. Ambient temperatures, temperatures of the air inside the box and on the outside surface of the plates were measured between 19:00 hours and 06:00 hours for 6 months. Also measured was the relative humidity. Results obtained reveal that the plates’ performances greatly depended on how clear the night was. For very clear night, the black painted aluminium gave the best result, maintaining a temperature difference of 3–8°C with the ambient. For a partly overcast night, the best result of 1–5°C difference between the inside air and the ambient was recorded by the unpainted galvanized steel while on heavily overcast night the best performance came from the unpainted aluminium with a temperature difference of 1–4°C. Thus unpainted galvanized steel and aluminium are considered best in region where the night sky is hardly clear.

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