Experiential learning in webcasting for peace through tourism

The purpose of this paper is to report on a project to develop cultural awareness and knowledge of the tourism profession; and to bring the team of students to Amman, Jordan to facilitate the first ever-global webcast of a conference. Within the international experience itself, the major components of the overall project involved grant writing, technological hands-on training, international student presentations, and the production of a professional videotape. The possibility of gaining such access had been made possible through the Undergraduate Research/ Experiential Learning Grant (UREL Grant) offered by the College of Education at UNI, which provided the ideal avenue for undergraduate and graduate students to seize this extraordinary opportunity. The significance of the project was multi-faceted. The project required UNI students to learn skills that would be both practical and meaningful in their future professions. This paper will describe the current research available that supports the need and benefits of international experiences and experiential learning to the student

Fluctuations Do Matter: Large Noise-Enhanced Halos in Charged-Particle Beams

The formation of beam halos has customarily been described in terms of a particle-core model in which the space-charge field of the oscillating core drives particles to large amplitudes. This model involves parametric resonance and predicts a hard upper bound to the orbital amplitude of the halo particles. We show that the presence of colored noise due to space-charge fluctuations and/or machine imperfections can eject particles to much larger amplitudes than would be inferred from parametric resonance alone.Comment: 13 pages total, including 5 figure

Collective Modes and Colored Noise as Beam-Halo Amplifiers

As illustrated herein, collective modes and colored noise conspire to produce beam halo with much larger amplitude than could be generated by either phenomenon separately. Collective modes are inherent to nonequilibrium beams with space charge. Colored noise arises from unavoidable machine transitions and/or errors that influence the internal space-charge force. Lowest-order radial eigenmodes calculated self-consistently for a direct-current, cylindrically symmetric, warm-fluid Kapchinskij-Vladimirskij equilibrium serve to model the collective modes. Even with weak space charge, small-amplitude collective modes, and weak noise strength, a pronounced halo is seen to develop if these phenomena act on the beam over a sufficiently long time, such as in a synchrotron or storage ring

Van Raalte Purchased $1,656.50 Acres from Courtland Palmer and Mary Ann Palmer

The indenture between Courtlandt Palmer and Mary Ann Palmer, his wife, of the City of State of New York and Albertus C. Van Raalte of Ottawa County, State of Michigan, stating that for the sum of $3,840.47, Van Raalte purchased$1,656.50 acres.https://digitalcommons.hope.edu/vrp_1840s/1158/thumbnail.jp

Coherent Synchrotron Radiation: Theory and Experiments

Our understanding of the generation of coherent synchrotron radiation in magnetic bending systems and its impact on beam dynamics has grown considerably over the past few years. The search for understanding has brought a number of surprises, all related to the complexity of the fully self-consistent problem. Herein I survey the associated phenomenology, theory, and experiments while emphasizing important subtleties that have recently been uncovered. I conclude by speculating on courses of future investigations that may prove fruitful

INFLUENCE OF CHAOS ON RESONANCE CROSSINGS #

Abstract We undertake a study of particle dynamics in a model fixed-field alternating-gradient (FFAG) synchrotron in which space-charge plays a central role. The space-charge force corresponds to a Gaussian charge distribution in both transverse dimensions. The betatron-tune is linearly ramped through resonance. This ramping alone can cause particles to enter orbits that have chaotic motion. We found that space-charge can lead to spreading of the available tunes which can either increase or decrease the effects of resonance. By applying recently developed techniques to measure complexity in the orbital dynamics, we also determine whether chaoticity can arise in particle trajectories and subsequently influence resonance crossings. Furthermore, we can see that the chaoticity changes drastically in the area around a resonance crossing