An essay of Dr. John Wallis, exhibiting his hypothesis about the flux and reflux of the sea, taken from the consideration of the common center of gravity of the Earth and Moon

1665 ◽  
Vol 1 (16) ◽  
pp. 263-281 ◽  
Keyword(s):  
Center Of Gravity ◽  
The Earth ◽  
Common Center ◽  
The Common ◽  
John Wallis

How abstruse a subject in philosophy, the flux and reflux of the sea hath proved hitherto, and how much the same hath in all ages perplexed the minds even of the best of naturalists, when they have attempted to render an account of the cause thereof, is needless here to represent.

scholarly journals XXIV. A discourse concerning the menstrual parallax, arising from the mutual gravitation of the Earth and Moon; it's influence on the observations of the Sun and Planets; with a method of observing it: By J. Smeaton, F. R. S

1768 ◽  
Vol 58 ◽  
pp. 156-169 ◽  
Keyword(s):  
Center Of Gravity ◽  
The Sun ◽  
Sir Isaac Newton ◽  
Isaac Newton ◽  
The Earth ◽  
Common Center

It is demonstrated by Sir Isaac Newton in the Principia , that it is not the Earth's center, but the common center of gravity of the Earth and Moon, that describes the ecliptic; and that the Earth and Moon revolve in similar ellipses, about their common center of gravity.

scholarly journals Biomechanic characteristics of target-oriented kick motions in sportive karate

2009 ◽  
Vol 8 (4) ◽  
pp. 162-164
Author(s):  
Yu. P. Bredikhina ◽  
F. I. Gouzhov ◽  
L. V. Kapilevich ◽  
V. I. Andreyev
Keyword(s):  
Motor Units ◽  
Center Of Gravity ◽  
Technical Training ◽  
Highly Qualified ◽  
Equilibrium Function ◽  
Common Center ◽  
The Common ◽  
Synchronous Operation

The methods of electrmiography and stabilography are used to determine biomechanic characteristics of target-oriented kick motions in sportive karate. It is shown that highly qualified sportsmen can better maintain equilibrium in main karate combat maneuvers. This shows itself in the smaller amplitude of vibrations of the common center of gravity and in higher quality values of the equilibrium function compared to lower-qualification sportsmen. In addition, masters of sports show the synchronous operation of motor units, their simultaneous participation in a kick motion. The dynamics of main stabilogram and electromiogram characteristics can be used as an indicator of the level of technical training of sportsmen.

WHITE ANTS DESTROYING LIVING TREES AND CHANGING THF FOLIAGE, IN CAMBRIDGE, MASS

1885 ◽  
Vol 17 (7) ◽  
pp. 134-136
Author(s):  
H. A. Hagen
Keyword(s):  
Dead Wood ◽  
The South ◽  
The Earth ◽  
The Common

The common white ant, Termes flavipes, destroys dead wood, stumps of trees and timber, just as does its nearest relative, T. lucifugus, in Europe. Of the latter species some cases are reported where living pines and oaks have been destroyed in the South of France. For T. flavipes, only one case is known, in which living grape vines in a hot house in Salem were injured. (S. H. Scudder. Proc. Boston, N. H. S., vol. 7, p. 287). Now the earth in the hot houses here in Cambridge is largely infested by white ants, but as far as I know, no destruction of plants has been observed. I was very much interested by the information from Mr. F. W. Putnam that in a garden in Irwing street living maples were largely infested by white ants. The evidence of the truth of this information was apparent by the first glance at the trees.

scholarly journals XXIII. On the degree of salubrity of the common air at sea, compared with that of the sea-shore, and that of places far removed from the sea

1780 ◽  
Vol 70 ◽  
pp. 354-377 ◽  
Keyword(s):  
The Earth ◽  
The Face ◽  
The Common ◽  
In The Beginning ◽  
Bodies Of Water

Sir, As you had recommended to me the examination of the air at sea by the nitrous test, I followed your advice in my return to the Continent in the beginning of November last: and I embraced that opportunity with the more eagerness, as I knew that you had given credit to the account of several consumptive people having recovered their health by going on sea voyages, after the common means for curing that distemper had failed. I was in hopes likewise to find in this inquiry, a confirmation of what you conjectured in you Anniversary Discourse in the year 1773, viz . that great bodies of water, such as seas and lakes, are conducive to the health of animals, by purifying and cleansing the air contaminated by their breathing in it: so that the salutary gales, by which this infected air is conveyed to the waters, and by them returned again to the land, though they do rise now and then to storms and hurricanes, must nevertheless induce us to trace and to reverse in them the ways of a beneficent Being, who, not fortuitously, but with design, not in wrath, but in mercy, thus shakes the waters and the air together, to bury in the deep those pestilential effluvia which the vegetables upon the face of the earth are insufficient to consume.

Eight-Axle Railcar Carbody Roll Performance: Center of Gravity and Track Wavelength Effects

2006 ◽  
Author(s):  
William Shust ◽  
Nicholas Wilson ◽  
Stan Gurule
Keyword(s):  
Contact Stresses ◽  
Center Of Gravity ◽  
Heavy Duty ◽  
Body Style ◽  
Trade Offs ◽  
The Common ◽  
Center Body

Heavy-duty railcars carry greater than typical payloads by employing additional wheelsets to lessen wheel/rail contact stresses. Rather than the common 4-axle designs, these cars may have up to 16 axles supporting one deck. Traditionally, these car types have not performed as well as desired. As a response, designers have created depressed center body styles to lower the overall center-of-gravity (CG) height. Such designs lead to more complexity and expense. In this investigation, a heavy-duty 8-axle flatcar has been modeled, both with a flat carbody and a depressed body style. Simulations of harmonic roll perturbations were performed using various CG heights, track perturbation wavelengths and operating speeds. Results include comparisons of design versus performance trade-offs.

scholarly journals Corrected μβ for stars of Hipparcos catalogue from independent latitude observations over many decades

2011 ◽  
pp. 35-41 ◽  
Author(s):  
G. Damljanovic ◽  
I.S. Milic
Keyword(s):  
International Organizations ◽  
Sufficient Accuracy ◽  
Proper Motions ◽  
Earth Orientation Parameters ◽  
Method Of Calculation ◽  
The Earth ◽  
Hipparcos Catalogue ◽  
International Polar ◽  
The Common ◽  
Orientation Parameters

During the last century, there were many so-called independent latitude (IL) stations with the observations which were included into data of a few international organizations (like Bureau International de l'Heure - BIH, International Polar Motion Service - IPMS) and the Earth rotation programmes for determining the Earth Orientation Parameters - EOP. Because of this, nowadays, there are numerous astrometric ground-based observations (made over many decades) of some stars included in the Hipparcos Catalogue (ESA 1997). We used these latitude data for the inverse investigations - to improve the proper motions in declination ?? of the mentioned Hipparcos stars. We determined the corrections ??? and investigated agreement of our ?? and those from the catalogues Hipparcos and new Hipparcos (van Leeuwen 2007). To do this we used the latitude variations of 7 stations (Belgrade, Blagoveschtschensk, Irkutsk, Poltava, Pulkovo, Warsaw and Mizusawa), covering different intervals in the period 1904.7 - 1992.0, obtained with 6 visual and 1 floating zenith telescopes (Mizusawa). On the other hand, with regard that about two decades have elapsed since the Hipparcos ESA mission observations (the epoch of Hipparcos catalogue is 1991.25), the error of apparent places of Hipparcos stars has increased by nearly 20 mas because of proper motion errors. Also, the mission lasted less than four years which was not enough for a sufficient accuracy of proper motions of some stars (such as double or multiple ones). Our method of calculation, and the calculated ?? for the common IL/Hipparcos stars are presented here. We constructed an IL catalogue of 1200 stars: there are 707 stars in the first part (with at least 20 years of IL observations) and 493 stars in the second one (less than 20 years). In the case of ?? of IL stars observed at some stations (Blagoveschtschensk, Irkutsk, Mizusawa, Poltava and Pulkovo) we find the formal errors less than the corresponding Hipparcos ones and for some of them (stations Blagoveschtschensk and Irkutsk) even less than the new Hipparcos ones.

scholarly journals XIV. On a determination of the mean density of the Earth and the gravitation constant by means of the common balance

1891 ◽  
Vol 182 ◽  
pp. 565-656 ◽  
Keyword(s):  
Royal Society ◽  
Torsion Balance ◽  
Chemical Balance ◽  
The Earth ◽  
The Common ◽  
The Mean ◽  
Common Balance

In a paper printed in the Proceedings of the Royal Society,' No. 190, 1878 (vol. 28, pp. 2-35), I gave an account of some experiments undertaken in order to test the possibility of using the Common Balance in place of the Torsion Balance in the Cavendish Experiment. The success obtained seemed to justify the intention expressed in that paper to continue the work, using a large bullion balance, instead of the chemical balance with which the preliminary experiments were made. As I have had the honour to obtain grants from the Royal Society for the construction of the necessary apparatus, I have been able to carry out the experiment on the larger scale which appeared likely to render the method more satisfactory, and this paper contains an account of the results obtained.

scholarly journals Catholic Social Teaching as an Explanation of Firm Environmental Impact

2020 ◽  
Vol 25 ◽  
pp. 161-179
Author(s):  
Anne Hetson ◽  
Brian M. Saxton ◽  
Mariah Webinger ◽  
Keyword(s):  
Environmental Impact ◽  
Environmental Sustainability ◽  
Environmental Performance ◽  
Common Good ◽  
Catholic Social Teaching ◽  
Social Teaching ◽  
The Common Good ◽  
The Earth ◽  
The Common ◽  
Economic Needs

Environmental sustainability in business has become a highly debated topic as societies decide how best to meet their economic needs and care for the earth. Catholic social teaching (CST) may add theoretical richness to the discussion. We examine solidarity, subsidiarity, and pursuit of the common good as dimensions of a heavy manufacturing, U.S.-based firm’s CST orientation. We find that measures of subsidiarity and common good predict a firm’s environmental performance consistent with CST principles. Results are of interest to academics, policymakers, and citizens who wish to advance the implementation of CST, environmental sustainability, or both.

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