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331.
Milan Minarovjech Milan Rybanský Vojtech Ru&#x;in 《Journal of Astrophysics and Astronomy》2000,21(3-4):197-200
We present an analysis of short time-scale intensity variations in the coronal green line as obtained with high time resolution
observations. The observed data can be divided into two groups. The first one shows periodic intensity variations with a period
of 5 min. the second one does not show any significant intensity variations. We studied the relation between regions of coronal
intensity oscillations and the shape of white-light coronal structures. We found that the coronal green-line oscillations
occur mainly in regions where open white-light coronal structures are located. 相似文献
332.
333.
A simple consistency argument for hypothesis of the galactic halo origin of the Lyα forest absorption lines is advanced, based
on the recent determination of column-density vs. impact parameter relation for the low-redshift gaseous galactic haloes.
It is shown that observations of neutral hydrogen absorption around luminous galaxies are consistent with the index of the
power-law column density distribution derived from statistical analyses of large samples of high-redshift Lyα forest lines.PACS: 98.62.Ra, 98.62.Gq, 98.80.Es
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
334.
It is not new to recognize that data from remote sensing platforms is transforming the way we characterize and analyse our environment. The ability to collect continuous data spanning spatial scales now allows geomorphological research in a data rich environment and this special issue [coming just eight years after the 2010 special issue of Earth Surface Processes and Landforms (ESPL) associated with the remote sensing of rivers] highlights the considerable research effort being made to exploit this information, for studies of geomorphic form and process. The 2010 special issue on the remote sensing of rivers noted that fluvial remote sensing articles made up some 14% of the total river related articles in ESPL. A similar review of articles up to 2017 reveals that this figure has increased to around 25% with a recent proliferation of articles utilizing satellite‐based data and structure from motion photogrammetry derived data. It is interesting to note, however that many studies published to date are proof of concept, concentrating on confirming the accuracy of the remotely sensed data at the expense of generating new insights and ideas on fluvial form and function. Data is becoming ever more precise and researchers should now be concentrating on analysing these early data sets to develop increased geomorphic insight, to challenge existing paradigms and to advance geomorphic science. The prospect of this occurring is increased by the fact that many of the new remote sensed platforms allow accurate spatial data to be collected cheaply and efficiently, reducing the need for substantial research funding to advance river science. Fluvial geomorphologists have never before been in such a liberated position. As techniques and analytical skills continue to improve it is inevitable that the prediction that remotely sensed data will revolutionize our understanding of geomorphological form and process will prove true, altering our ideas on the very nature of system functioning in the process. © 2018 The Authors. Earth Surface Processes and Landforms published by John Wiley & Sons Ltd. 相似文献