This work is dedicated to the study, in the framework of known models of coronal loops, of cold long loops observed in several spectral lines by SOHO. In particular an observation made by SOHO/CDS in the O V (629.73 A) line show a very high speed ow along a loop. The comparison with steady state siphon ow loop models leads to the conclusion that such loop cannot be in steady state; in particula...

Post-authoritarian Indonesia has shown some sub-national political leaders fell from power before their first term while others have survived through it. I argue that the durability of these leaders is influenced by two factors: strategy of extraction and populist policy. Sub-national leaders need to extract in order to collect resources and in turn finance political strategies to maintain thei...

Recently determined heavy element abundances 1-3 have led to significant changes in our understanding of the internal structure and constitution of the Sun. It turns out that the standard solar models calculated with the new abundances are significantly different from the helioseismic results which were in a good agreement with the previous solar models. Figure 1 shows the relative difference b...

Studies of the origin of coronal heating and acceleration of the solar wind invoke high-frequency Alfvén waves. Here we suggest a source for such waves associated with twisted magnetic loops emerging on the solar surface and reconnecting with the open field. We identify the loops with the ephemeral regions (small-scale bipoles) observed by ground-based instruments and by SOHO. To characterize t...

The existing works point out that smaller organisations have been shown to have different technology adoption patterns than large ones. However, it is unclear whether Small to Medium Sized Enterprises (SMEs) and large organisations take decisions for the adoption of integration technologies by focusing on different factors. Moreover, the literature also shows that there is an absence of theoret...

This paper studies a principal-agent model of the relationship between officeholder and the electorate, where everyone is initially uninformed about the officeholder’s ability. If office-holder effort and ability interact in the determination of performance in office, then an office-holder has an incentive to learn i.e. raise effort so that performance becomes a more accurate signal of her abil...

Coronal loops are the basic elements of the solar corona and are responsible for the totality of the coronal X-ray emission. Loop physics is therefore important to understand the structure, heating, dynamics and evolution of the corona. A well-established and useful approach to study loop physics has been the detailed hydrodynamic modeling of the connned plasma, coupled to the synthesis of obse...

Observations of the large two-ribbon flare on 7 November 2004 made using SOHO and TRACE data are interpreted in terms of a three-dimensional magnetic field model. Photospheric flux evolution indicates that −1.4 × 10 Mx of magnetic helicity was injected into the active region during the 40-hour build-up prior to the flare. The magnetic model places a lower bound of 8×10 ergs on the energy stored...

The COVID-19 disease is rapidly spreading around the world, affecting many countries and their healthcare systems.Like many other countries, Iran is struggling with the current situation. In this article, we aim to share our perspectiveson confronting obstacles mentioned above using appropriate hospital protocols during the COVID-19 crisis.We investigated and compared the numb...

in recent years, virtual communities have been significantly popular and almost all of them are targeted for business profitability. in our study, the profitability of these communities for businesses has been analyzed from a commercial perspective. the study considers virtual community as a business model which can have a great impact on consumer purchase decision process. with respect to refe...