scholarly journals A photoelectric method of measuring the light of the night sky with studies of the course of variation through the night

1929 ◽  
Vol 124 (794) ◽  
pp. 395-408 ◽  
Keyword(s):  
International Committee ◽  
Diurnal Periodicity ◽  
The Other ◽  
Photoelectric Method ◽  
Other Hand ◽  
Satisfactory Method ◽  
Ordinary Light ◽  
Method Of Measurement ◽  
Night Sky

The investigations already published on the intensity of the night sky have been made by means of visual photometry, using a convenient instrument with a self-contained luminous source of radioactive origin. Nothing could rival this for simplicity and portability; it is always ready and requires no attention. On the other hand visual photometry is not a very satisfactory process even for ordinary light, and with this faint light it is far from giving the desirable degree of accuracy. I have therefore spent much effort in trying to replace it by some photoelectric method of measurement. A satisfactory method has now been evolved, and will be described, together with the results. A preliminary notice of the earlier results was given in a paper written at the request of Prof. S. Chapman, F. R. S., Chairman of the International Committee on Terrestrial and Solar Relationships, the receipt of which was acknowledged by him on June 19, 1928. The relevant passage is:- "Most of the difficulties have been overcome and preliminary observations have been in progress for some months past. I have been able to follow the changes of intensity from hour to hour on clear nights. Some evidence has been found suggesting diurnal periodicity. The observed intensity nearly always increases between nightfall and midnight, beyond which the observations have not usually been carried."

The International Tracing Service in 1971

1972 ◽  
Vol 12 (135) ◽  
pp. 335-336
Keyword(s):  
Federal Republic ◽  
International Committee ◽  
Considerable Change ◽  
The Other ◽  
Death Certificates ◽  
Federal Republic Of Germany ◽  
Historical Information ◽  
Other Hand ◽  
Attorneys General ◽  
First Time

Under the 1955 Agreements, the duties laid upon the International Tracing Service (ITS), at Arolsen, the management of which was entrusted to the International Committee, were defined.Far from diminishing over the years, the volume of work involved is still very considerable, as will be seen from the information given below:In 1971, ITS received 127,872 requests, which was 4,543 more than it had received the year before. There was a considerable change in the categories of requests. For the first time, the number of requests for certificates of detention and residence, connected with the law on compensation which in 1953 came into effect in the Federal Republic of Germany, was no longer the largest (48,800 in 1971 as against 71,169 in 1970). There was a corresponding drop in the number of requests for death certificates (4,747 as against 7,173 in 1970) and in the number of requests for documents concerning cases of illness (4,958 as against 6,270 in 1970). On the other hand, the category relating to requests for the preparation of books in memory of victims of deportation, requests submitted by record services, requests from attorneys-general, and requests for information with a view to obtaining annuities and pensions, amounted to 57,914 units, which was more than double the figure for the preceding year. There were 1,315 requests for statistical and historical information, 749 for photocopies, and 708 sundry requests.

Cognitive Strategy and Ability in Endurance Activities

2003 ◽  
Vol 96 (2) ◽  
pp. 510-516 ◽  
Author(s):  
Roberta Antonini-Philippe ◽  
Eric Reynes ◽  
Gérard Bruant
Keyword(s):  
Elite Athletes ◽  
Cognitive Strategy ◽  
The Other ◽  
Men And Women ◽  
Other Hand ◽  
Significant Difference ◽  
Method Of Measurement

The purpose of this study was to ascertain whether elite athletes utilize associative strategies and, on the other hand, if nonelite athletes prefer to use dissociative strategies. 60 athletes were interviewed and the Schomer's 1986 method of measurement was used to measure association and dissociation. Analysis showed no significant differences in the total associative and dissociative scores among the three different abilities. However, a significant difference was found concerning the use of dissociative strategy between men and women.

SIMAETHA GOT IT RIGHT, AFTER ALL: THEOCRITUS, IDYLL 2, A COURTESAN'S PANTRY AND A LOST GREEK TRADITION OF HEXAMETRICAL CURSES

2021 ◽  
pp. 1-14
Author(s):  
Christopher Athanasious Faraone
Keyword(s):  
Young Athlete ◽  
The Other ◽  
Late Antique ◽  
Unreliable Narrator ◽  
Other Hand ◽  
Conservative Nature ◽  
Greek Tradition ◽  
Night Sky

Theocritus divides his second Idyll into two roughly equal sections, each punctuated by ten refrains: in the first half, a courtesan named Simaetha describes an ongoing erotic spell that she and her servant are performing and at the same time she enacts it by reciting a series of short similia-similibus incantations; in the second half, she speaks to Selene in the night sky and tells her the story of her brief affair with and betrayal by a handsome young athlete named Delphis. Literary scholars have written much about this poem, but they are more often concerned with the second, confessional half, with its complicated narrative layers and its charmingly naïve and unreliable narrator. Historians of religion and magic, on the other hand, have focussed most of their energies on the first half of the poem, using as comparanda the much later evidence of Roman-era curse tablets (katadesmoi) and late antique magical papyri to make sense of what Simaetha does and says during her long ritual, an approach that was enshrined by Gow in the middle of the last century, when he argued that, because of the conservative nature of these later magical spells, there was little risk of serious anachronism in using them for comparison.

scholarly journals 21. Light of the Night-Sky

1973 ◽  
Vol 15 (1) ◽  
pp. 241-252
Author(s):  
H. Elsässer
Keyword(s):  
Present Report ◽  
The Other ◽  
Wide Field ◽  
Physical Processes ◽  
The Earth ◽  
Other Hand ◽  
Heterogeneous Nature ◽  
The Subject ◽  
Night Sky ◽  
In The Beginning

The subject of Commission 21 is of a heterogeneous nature and the borderlines to other Commissions are not very well defined. The light of the night-sky comprises a variety of components which are due to various kinds of physical processes taking place at very different distances from the Earth.In the present report less emphasis is placed on airglow problems as in previous ones in accordance with a recommendation of Commission 21 of 1970. During recent years airglow research became an important subject of geophysics and the new tools offered by rockets and satellites have enormously expanded the observational side. This report tries to concentrate upon aspects of astronomical interest. The review papers on airglow and connected atmospheric problems mentioned in the beginning of Chapter II on the other hand contain valuable information on progress in all sections of this wide field.

22. Commission Des Meteores, De La Lumiere Zodiacale Et Des Problemes Analogues

1950 ◽  
Vol 7 ◽  
pp. 240-250
Author(s):  
M. F. L. Whipple
Keyword(s):  
Upper Atmosphere ◽  
The Other ◽  
Scientific Interest ◽  
Zodiacal Light ◽  
Knowledge Of Results ◽  
Other Hand ◽  
Night Sky

The scope of this Report is to cover briefly the progress in the study of meteors and meteorites since the 1938 meeting of Commission 22. The Sub-Commission on the Zodiacal Light has been expanded to include also the Light of the Night Sky and is now presided over by M. Jean Dufay. The ever-increasing scientific interest in the problems of nocturnal radiations and the fascinating difficulties of interpretation promise an exciting future for research in these two observationally related fields. On the other hand, the present intensive interest in the earth’s upper atmosphere and in ionospheric research makes interpretation in any one field of research in Commission 22 even more dependent upon knowledge of results in the other fields. Hence it appears essential that Commission 22 and its sub-commission keep in close rapport and that a considerable overlapping of membership be maintained.

How the Aryballos was suspended

1928 ◽  
Vol 29 ◽  
pp. 216-223
Author(s):  
C. H. Emilie Haspels
Keyword(s):  
The Other ◽  
Other Hand ◽  
Satisfactory Method

If we look at the aryballos represented in the field of our vase (Pl. III), we ask ourselves what the tags are which we see hanging on the shoulder. This question involves another, how the aryballos was carried. I shall try to answer both questions.The old, Corinthian type of aryballos was suspended by its big, solid handle, through which a cord or string was passed.The Attic type, on the other hand, was carried by a cord tied round the neck of the vase. That is the rule, even when there are handles. Such handles are narrow and consequently fragile; and there was no reason to reject a perfectly satisfactory method of suspension because of a change in detail.I. The simplest way is as follows. Make a loop in a cord, knotting the cord at a (Fig. 1, 1). See that the loose ends are of the same length. Then pass the ends round the neck of the vase, and make another knot on the other side at b (Fig. 1, 2). Two ends thus hang down from the neck, on the side opposite to the loop by which the vase is carried. Seen in profile : Fig. 1, 3. As soon as you carry the vase, it naturally tips up (Fig. 1, 4) (just as the Corinthian type did which was carried by the handle).

Agreement between the International Committee of the Red Cross and the League of Red Cross and Red Crescent Societies

1990 ◽  
Vol 30 (274) ◽  
pp. 23-35
Keyword(s):  
International Committee ◽  
Secretary General ◽  
The Other ◽  
Red Cross ◽  
Other Hand ◽  
The One

The International Committee of the Red Cross (hereinafter called “the ICRC”), represented by Mr. Cornelio Sommaruga, President, and by Mr. Yves Sandoz, Director, on the one hand, andthe League of Red Cross and Red Crescent Societies (hereinafter called “the League”), represented by Mr. Mario Villarroel Lander, President, and Mr. Pär Stenbäck, Secretary General, on the other hand,

A study of cometary eruptions through OH radio-lines

1999 ◽  
Vol 173 ◽  
pp. 249-254
Author(s):  
A.M. Silva ◽  
R.D. Miró
Keyword(s):  
Short Duration ◽  
Growth Curves ◽  
The Other ◽  
Initial Mass ◽  
Radio Lines ◽  
Other Hand ◽  
Sudden Rise

AbstractWe have developed a model for theH2OandOHevolution in a comet outburst, assuming that together with the gas, a distribution of icy grains is ejected. With an initial mass of icy grains of 108kg released, theH2OandOHproductions are increased up to a factor two, and the growth curves change drastically in the first two days. The model is applied to eruptions detected in theOHradio monitorings and fits well with the slow variations in the flux. On the other hand, several events of short duration appear, consisting of a sudden rise ofOHflux, followed by a sudden decay on the second day. These apparent short bursts are frequently found as precursors of a more durable eruption. We suggest that both of them are part of a unique eruption, and that the sudden decay is due to collisions that de-excite theOHmaser, when it reaches the Cometopause region located at 1.35 × 105kmfrom the nucleus.

Closing the GAP—A 5Å Scanning Microscope

1969 ◽  
Vol 27 ◽  
pp. 6-7
Author(s):  
A. V. Crewe
Keyword(s):  
Normal Form ◽  
The Other ◽  
Resolving Power ◽  
Scanning Microscope ◽  
Conventional Microscope ◽  
Other Hand ◽  
Closing The Gap ◽  
Thermal Sources ◽  
Better Than ◽  
Transmission Microscope

We have become accustomed to differentiating between the scanning microscope and the conventional transmission microscope according to the resolving power which the two instruments offer. The conventional microscope is capable of a point resolution of a few angstroms and line resolutions of periodic objects of about 1Å. On the other hand, the scanning microscope, in its normal form, is not ordinarily capable of a point resolution better than 100Å. Upon examining reasons for the 100Å limitation, it becomes clear that this is based more on tradition than reason, and in particular, it is a condition imposed upon the microscope by adherence to thermal sources of electrons.

Life Beyond 1MeV

1980 ◽  
Vol 38 ◽  
pp. 30-33
Author(s):  
K.H. Westmacott
Keyword(s):  
Electron Microscopy ◽  
Past Experience ◽  
The Other ◽  
Good Case ◽  
Other Hand ◽  
The U.S

Life beyond 1MeV – like life after 40 – is not too different unless one takes advantage of past experience and is receptive to new opportunities. At first glance, the returns on performing electron microscopy at voltages greater than 1MeV diminish rather rapidly as the curves which describe the well-known advantages of HVEM often tend towards saturation. However, in a country with a significant HVEM capability, a good case can be made for investing in instruments with a range of maximum accelerating voltages. In this regard, the 1.5MeV KRATOS HVEM being installed in Berkeley will complement the other 650KeV, 1MeV, and 1.2MeV instruments currently operating in the U.S. One other consideration suggests that 1.5MeV is an optimum voltage machine – Its additional advantages may be purchased for not much more than a 1MeV instrument. On the other hand, the 3MeV HVEM's which seem to be operated at 2MeV maximum, are much more expensive.

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