An internship with Arthur Roger Gallery, LLC

The following report is the analysis of a three-month internship within this organization, and will discuss topics as they relate to the cuniculum of the Arts Administration degree. The for-profit nature of this internship and its completion within a small-scale structure presented me with several not-so-clearly delineated tasks. In order to properly introduce the topics associated with the responsibilities of the assignment at Arthur Roger Gallery, the reader must first become familiar with the nature of the business, and its management structure. Chapter II is exclusively devoted to the purpose of the internship. By considering the role of the intern, who acted in the role of an assistant to the staff, this section will outline the importance of compiling an inventory, and the necessity of maintaining the gallery\u27s website in the most accurate manner. The third chapter of the present report is an attempt to identify the reasons that separate the Arthur Roger Gallery from its competitors. This section will address several elements discussed through our cuniculum, particularly during the Visual Art and Marketing classes. Broadly speaking, it will show that Arthur Roger has fully understood the who, what, where, why, when and how of selling fine art in his market area. The final section of the discussion will involve several points dealing principally with management and technical concerns, for the most part related to the growing activity of the business and its recent evolutions

An internship with Arthur Roger Gallery, LLC

The following report is the analysis of a three-month internship within this organization, and will discuss topics as they relate to the cuniculum of the Arts Administration degree. The for-profit nature of this internship and its completion within a small-scale structure presented me with several not-so-clearly delineated tasks. In order to properly introduce the topics associated with the responsibilities of the assignment at Arthur Roger Gallery, the reader must first become familiar with the nature of the business, and its management structure. Chapter II is exclusively devoted to the purpose of the internship. By considering the role of the intern, who acted in the role of an assistant to the staff, this section will outline the importance of compiling an inventory, and the necessity of maintaining the gallery\u27s website in the most accurate manner. The third chapter of the present report is an attempt to identify the reasons that separate the Arthur Roger Gallery from its competitors. This section will address several elements discussed through our cuniculum, particularly during the Visual Art and Marketing classes. Broadly speaking, it will show that Arthur Roger has fully understood the who, what, where, why, when and how of selling fine art in his market area. The final section of the discussion will involve several points dealing principally with management and technical concerns, for the most part related to the growing activity of the business and its recent evolutions

Alfven Wave Reflection and Turbulent Heating in the Solar Wind from 1 Solar Radius to 1 AU: an Analytical Treatment

We study the propagation, reflection, and turbulent dissipation of Alfven waves in coronal holes and the solar wind. We start with the Heinemann-Olbert equations, which describe non-compressive magnetohydrodynamic fluctuations in an inhomogeneous medium with a background flow parallel to the background magnetic field. Following the approach of Dmitruk et al, we model the nonlinear terms in these equations using a simple phenomenology for the cascade and dissipation of wave energy, and assume that there is much more energy in waves propagating away from the Sun than waves propagating towards the Sun. We then solve the equations analytically for waves with periods of hours and longer to obtain expressions for the wave amplitudes and turbulent heating rate as a function of heliocentric distance. We also develop a second approximate model that includes waves with periods of roughly one minute to one hour, which undergo less reflection than the longer-period waves, and compare our models to observations. Our models generalize the phenomenological model of Dmitruk et al by accounting for the solar wind velocity, so that the turbulent heating rate can be evaluated from the coronal base out past the Alfven critical point - that is, throughout the region in which most of the heating and acceleration occurs. The simple analytical expressions that we obtain can be used to incorporate Alfven-wave reflection and turbulent heating into fluid models of the solar wind.Comment: 9 pages, 9 figures, accepted for publication in Ap

Constraining Low-Frequency Alfvenic Turbulence in the Solar Wind Using Density Fluctuation Measurements

One proposed mechanism for heating the solar wind, from close to the sun to beyond 10 AU, invokes low-frequency, oblique, Alfven-wave turbulence. Because small-scale oblique Alfven waves (kinetic Alfven waves) are compressive, the measured density fluctuations in the solar wind place an upper limit on the amplitude of kinetic Alfven waves and hence an upper limit on the rate at which the solar wind can be heated by low-frequency, Alfvenic turbulence. We evaluate this upper limit for both coronal holes at 5 solar radii and in the near-Earth solar wind. At both radii, the upper limit we find is consistent with models in which the solar wind is heated by low-frequency Alfvenic turbulence. At 1 AU, the upper limit on the turbulent heating rate derived from the measured density fluctuations is within a factor of 2 of the measured solar wind heating rate. Thus if low-frequency Alfvenic turbulence contributes to heating the near-Earth solar wind, kinetic Alfven waves must be one of the dominant sources of solar wind density fluctuations at frequencies of order 1 Hz. We also present a simple argument for why density fluctuation measurements do appear to rule out models in which the solar wind is heated by non-turbulent high-frequency waves ``sweeping'' through the ion-cyclotron resonance, but are compatible with heating by low-frequency Alfvenic turbulence.Comment: 8 pages, 3 figures, submitted to Ap

The Turbulent Heating Rate in Strong MHD Turbulence with Nonzero Cross Helicity

Different results for the cascade power in strong, incompressible MHD turbulence with nonzero cross helicity appear in the literature. In this paper, we discuss the conditions under which these different results are valid. We define z+ to be the rms amplitude of Alfven waves propagating parallel to the background magnetic field, and z- to be the rms amplitude of Alfven waves propagating anti-parallel to the background magnetic field. Nonzero cross helicity implies that z+ and z- differ, and we take z- to be less than z+. We find that the mechanism that generates the z- fluctuations strongly affects the cascade power, because it controls the coherence time for interactions between oppositely directed wave packets at the outer scale. In particular, for fixed values of z+ and z-, the cascade power is in many cases larger when the z- fluctuations are generated by the reflection of z+ fluctuations than when the z- fluctuations are generated by forcing that is only weakly correlated with the z+ fluctuations.Comment: 16 pages, 2 figures, accepted for publication in Ap