Observations of the plasma flow in comet P/Swift‐Tuttle

We present direct ground based observations of the plasma flow sunward and tailward of the nucleus of comet P/Swift‐Tuttle. The observations are long‐slit high resolution spectra of the H_2O^+ emission centered at 6199Å with a velocity resolution of about 7 km s^(−1) (FWHM) and a spatial resolution of about 10^4 km at the comet. Emission is visible from just inside the predicted position of the cometopause on the sunward side of the nucleus out to 5 × 10^5 km on the tailward side. The deceleration of the solar plasma on the sunward side is clearly observed as is the acceleration of cometary ions into the tail. These observations show the effectiveness of ground based methods for the systematic study of cometary plasmas and point to the need for a better theoretical understanding of their acceleration mechanisms

Quit Messing Around: Department Of Defense Anti-Prostitution Policies Do Not Eliminate U.S.-Made Trafficking Demand

Thirty feet outside the main gate of Camp Casey, a group of soldiers wair for the cross-walk light to flash permission to walk

Mentoring the Millennials: Induction of the Millennial Generation in Education

This research explored who the Millennial teacher is and revealed the relevancy of current teacher induction programs for them, as well as through the lens of the school leaders responsible for induction programming. Research Questions 1. How do millennial generation teachers perceive their induction programs as new teachers? a. What are the perceived needs of millennials in their first year of teaching? b. How does induction programming meet these needs? c. What are the perceived effectiveness of these programs to meet millennial needs? 2. How do building/district level leaders perceive the induction of millennial generation teachers? a. What are the perceived needs of millennials in their first year of teaching? b. How does induction programming meet these needs? c. What is the perceived effectiveness of these programs to meet millennial needs? This retrospective case study interviewed thirteen Millennial age teachers and six school administrators responsible for induction and mentoring programs. Data collected were analyzed through a theoretical framework derived from the Strauss-Howe Generational Theory. This study presents five themes that emerged from the research: Feedback, Work/Life Balance and Commitment, Teacher Autonomy, Technology, Relationships. Millennial teachers desire feedback and challenges arise in schools when deciding who should give feedback and how much is enough. Differences in Millennial teacher and administrator perception of commitment to work were noted. Millennial teachers want to work more autonomously with positive and negative results. Technology use was especially surprising as most did not reflect a technology-obsessed cohort promoted by mass media. Lastly, relationship building is causing new complexities amongst school staff

Inciting the Social Imagination: Education Reseach for the Public Good

Publicly Engaged Scholarship (PES) is emerging as a paradigm expanding notions about knowledge production and a methodological toolkit for impactful, interdisciplinary, scholarly practice. While a growing literature provides evidence for its efficacy, more is needed to specify key dimensions. Shaped around findings from a national study exploring the aspirations and decisions of graduate students and early career professionals, this research symposium brings together key individual and institutional aspects of PES. The second paper presents insights from the first year of an innovative college model designed around core principles of PES. Employing a conceptual approach, two additional papers in turn, interrogate the role of “activism” in scholarship and present conceptual framing for knowledge production and institutional change in the 21st Century

Energy Dependence of Scattering Ground State Polar Molecules

We explore the total cross section of ground state polar molecules in an electric field at various energies, focusing on RbCs and RbK. An external electric field polarizes the molecules and induces strong dipolar interactions leading to non-zero partial waves contributing to the scattering even as the collision energy goes to zero. This results in the need to compute scattering problems with many different values of total M to converge the total cross section. An accurate and efficient approximate total cross section is introduced and used to study the low field temperature dependence. To understand the scattering of the polar molecules we compare a semi-classical cross section with quantum unitarity limit. This comparison leads to the ability to characterize the scattering based on the value of the electric field and the collision energy.Comment: Accepted PRA, 10 pages, 5 figure

Keck Speckle Imaging of the White Dwarf G29-38: No Brown Dwarf Companion Detected

The white dwarf Giclas 29-38 has attracted much attention due to its large infrared excess and the suggestion that excess might be due to a companion brown dwarf. We observed this object using speckle interferometry at the Keck telescope, obtaining diffraction-limited resolution (55 milliarcseconds) at K band, and found it unresolved. Assuming the entire K band excess is due to a single point-like companion, we place an upper limit on the binary separation of 30 milliarcseconds, or 0.42 AU at the star's distance of 14.1 pc. This result, combined with astroseismological data and other images of G29-38, supports the hypothesis that the source of the near-infrared excess is not a cool companion but a dust cloud.Comment: 7 pages, 2 figure