scholarly journals Large Electron Densities in the Early Morning Equatorial Ionosphere Observed with UV Instruments from Space

2021 ◽  
Author(s):  
Robert Schaefer ◽  
Larry Paxton ◽  
Yongliang Zhang ◽  
Hyosub Kil ◽  
Giuseppe Romeo ◽  
...  
2005 ◽  
Vol 23 (7) ◽  
pp. 2487-2499 ◽  
Author(s):  
R. P. Kane

Abstract. The global evolutions of foF2 anomalies were examined for three very intense geomagnetic storms, namely the Halloween events of October-November 2003 (Event X, 29–30 October 2003, Dst –401 nT; Event Y, 20–21 November 2003, Dst –472 nT), and the largest Dst storm (Event Z, 13–14 March 1989, Dst –589 nT). For Event X, troughs (negative storms) were clearly seen for high northern and southern latitudes. For northern midlatitudes as well as for low latitudes, there were very strong positive effects on 29 October 2003, followed by negative effects the next day. For Event Y, there were no troughs in NH high latitudes for morning and evening hours but there were troughs for night. For midlatitudes and low latitudes, some longitudes showed strong negative effects in the early morning as expected, but some longitudes showed strong positive effects at noon and in the evening hours. Thus, there were many deviations from the model patterns. The deviations were erratic, indicating considerable local effects superposed on general patterns. A disconcerting feature was the presence of strong positive effects during the 24 h before the storm commencement. Such a feature appears only in the 24 h before the geomagnetic storm commencement but not earlier. If genuine, these could imply a prediction potential with a 24-h antecedence. For Event Z (13–14 March 1989, equinox), all stations (all latitudes and longitudes) showed a very strong "negative storm" in the main phase, and no positive storms anywhere. Keywords. Ionosphere (Equatorial ionosphere – Ionospheric disturbances – Mid-latitude Ionosphere – Polar ionosphere)


2006 ◽  
Vol 19 (1) ◽  
pp. 45-51 ◽  
Author(s):  
Myriam Juda ◽  
Mirjam Münch ◽  
Anna Wirz-Justice ◽  
Martha Merrow ◽  
Till Roenneberg

Abstract: Among many other changes, older age is characterized by advanced sleep-wake cycles, changes in the amplitude of various circadian rhythms, as well as reduced entrainment to zeitgebers. These features reveal themselves through early morning awakenings, sleep difficulties at night, and a re-emergence of daytime napping. This review summarizes the observations concerning the biological clock and sleep in the elderly and discusses the documented and theoretical considerations behind these age-related behavioral changes, especially with respect to circadian biology.


Author(s):  
Julio H. Cole

Milton Friedman, who died in the early morning of November 16, 2006, was a world-famous economist, and an ardent and effective advocate of the free market economy. Much of his celebrity derived from his role as public intellectual, an aspect of his work that was reflected largely in popular books, such as Capitalism and Freedom (1962) and the hugely successful Free to Choose (1980) -both co-authored with his wife, Rose (and the latter based on the television documentary of the same title)- and in the Newsweek opinion columns he wrote for many years. Though he was already well-known by the time he received the Nobel Prize in Economics, in 1976, both his stature as public figure and his effectiveness as policy advocate were greatly enhanced by that award, and this is what has been mostly stressed in the vast outpouring of obituaries and public testimonials prompted by his recent passing. It is important to recall, however, that there was another aspect of his career, one which most professional economists (and probably Friedman himself) would regard as far more important than his incursions in the policy arena. Indeed, even if "Friedman the public intellectual" had never existed, "Friedman the economic scientist" would still be renowned and respected (though perhaps not as a bona fide world-class celebrity), and his memory will live long in the lore of economics It is primarily this other aspect of his life and work that I wish to focus on in this essay.


1988 ◽  
Vol 5 (2) ◽  
pp. 285-287
Author(s):  
Akbar S. Ahmed

One of the great paradoxes of the modern world is that India, the land that produced such major world religions as Buddhism Jainism is now torn apart by caste and communal violence. Pakistan and Sri Lanka, like India, face severe ethnic problems. Law and order are to be emphasized. Caste and community must be protected by the executive branch of the Indian Government. This bas been laid down in the rules framed by the legislative branch. When this is not done there is a breakdown. No one is safe and no group is secure. In India today this is clearly the case. This book by M. J. Akbar is a collection of 15 journalistic pieces, written for Akbar's newspaper and magazine, The Telegraph and Sunday over the last decade. Because it is journalism, the important "burning" issues are covered such as the Moradabad massacre in 1980, the slaughter of the Uttar Pradesh Harijans in 1981 and the ongoing Babri Masjid controversey. It is journalism, but the writing is of high quality and evocative: "It is early morning and a mist lies on the river, making the pre-dawn haze more blurred. A part of the Howrah Bridge looms through the gauze, like a picture deliberately created by a photographer in search of art. The fires are out." (p. 170) Akbar's material is hard, brittle, compelling stuff. He writes with the passion of the committed and his commitments are to secularism, to humanity, to the truth, as he sees it, on the ground. Here, a brief account of Dr. Akbar's cultural background seems appropriate: He was born in 1951 and has become the English-speaking voice of post-Midnight's Children of India. The significance of post 1947 independence as a dividing line is generally not fully appreciated. Missing is the literary, sentimental romanticism of the earlier Indian generation of writers. Don Moraes and Ved Mehta already appear as dated figures of the past. Their India is another country. In Akbar's background there is no punting on English rivers, laboring at Oxford intonations, getting drunk after the Oxford-Cambridge boat race nor leisurely reading of the English romantic poets on the banks of the Cam. Akbar lives in the urban nightmare of Calcutta and in his nostrils is the smell of burning flesh and rotting corpses. Missing, though he is aware of the loss, is the romantic vision of Nehru and the religious idealism of Gandhi. Akbar is an Indian writing with a white-hot pen for Indians of today's India ...


The Condor ◽  
2007 ◽  
Vol 109 (2) ◽  
pp. 441-446 ◽  
Author(s):  
Niall H.K. Burton

Abstract The relationship between nest entrance orientation and latitude among ground-nesting passerines was reviewed using published information. Data were collated for seven North American and European species. Pooling within-species comparisons, there was a clear trend from a preference for north-facing nests at lower latitudes to eastward- or southward-facing nests farther north. Orientations differed significantly in eight of 12 cases for which statistical comparison was possible, means differing in the expected direction in six of these cases. These results highlight how the influence of solar radiation on nest microclimate typically delineates preferred nest orientation in these species, i.e., at lower latitudes, the need for shade results in a preference for northward orientations; at mid latitudes, eastward orientations predominate, reflecting a probable balance between the benefits of warmth in the early morning and shade in the afternoon; while at high latitudes, nests may be oriented southward to gain warmth throughout the day.


BJPsych Open ◽  
2020 ◽  
Vol 6 (2) ◽  
Author(s):  
Konstantin F. Brückmann ◽  
Jürgen Hennig ◽  
Matthias J. Müller ◽  
Stanislava Fockenberg ◽  
Anne-Marthe Schmidt ◽  
...  

Summary Depression risk is associated with a late chronotype pattern often described as an ‘evening chronotype’. Fluctuations in mood over consecutive days have not yet been measured according to chronotype in in-patients with depression. A total of 30 in-patients with depression and 32 healthy controls matched for gender and age completed a chronotype questionnaire and twice-daily ratings on mood for 10 consecutive days (registered in the German Clinical Trials Register: DRKS00010215). The in-patients had Saturdays and Sundays as hospital-leave days. The relationship between chronotype and daily mood was mediated by the weekday–weekend schedule with higher levels of negative affect in the evening-chronotype patient subgroup at weekends. Results are discussed with respect to a probably advantageous standardised clinical setting with early morning routines, especially for patients with evening chronotypes.


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