High-resolution imaging spectroscopy of two micro-pores and an arch filament system in a small emerging-flux region

Aims. The purpose of this investigation is to characterize the temporal evolution of an emerging flux region, the associated photospheric and chromospheric flow fields, and the properties of the accompanying arch filament system. Methods. This study is based on imaging spectroscopy with the G\"ottingen Fabry-P\'erot Interferometer at the Vacuum Tower Telescope, on 2008 August 7. Cloud model (CM) inversions of line scans in the strong chromospheric absorption H$\alpha$ line yielded CM parameters, which describe the cool plasma contained in the arch filament system. Results. The observations cover the decay and convergence of two micro-pores with diameters of less than one arcsecond and provide decay rates for intensity and area. The photospheric horizontal flow speed is suppressed near the two micro-pores indicating that the magnetic field is sufficiently strong to affect the convective energy transport. The micro-pores are accompanied by an arch filament system, where small-scale loops connect two regions with H$\alpha$ line-core brightenings containing an emerging flux region with opposite polarities. The chromospheric velocity of the cloud material is predominantly directed downwards near the footpoints of the loops with velocities of up to 12 km/s, whereas loop tops show upward motions of about 3 km/s. Conclusions. Micro-pores are the smallest magnetic field concentrations leaving a photometric signature in the photosphere. In the observed case, they are accompanied by a miniature arch filament system indicative of newly emerging flux in the form of $\Omega$-loops. Flux emergence and decay take place on a time-scale of about two days, whereas the photometric decay of the micro-pores is much more rapid (a few hours), which is consistent with the incipient submergence of $\Omega$-loops. The results are representative for the smallest emerging flux regions still recognizable as such.Comment: 15 pages, 16 figures, 3 tables, published in A&

Relationship Among Connected Classroom Climate and Teacher Verbal and Nonverbal Immediacy and Trait and State Communication Apprehension

Connected classroom climate, teacher immediacy and communication apprehension have been found to have significant impact on students. This study examines the relationship among these variables. A total of 149 students from nine sections of an introductory public speaking course successfully completed five measures for this study. The students self reported their communication apprehension both at the start of the course as well as at the end using the Personal Report of Communication Apprehension 24 (PRCA-24), and also completed surveys on their levels of state communication apprehension after two of the major speaking assignments using the Communication Anxiety Inventory: Form State (CAI). The students also completed measures rating their instructors\u27 levels of verbal and nonverbal immediacy, using the Nonverbal Immediacy Scale-Observer Report (NIS) and the Vernal Immediacy Behaviors (VIB). Finally rhe students were asked to complete a measure of their perceptions of connected classroom climate, using the Connected Classroom Climate Inventory (CCCI). SPSS was used to explore the statistical relationships among the variables. Data analyses revealed several significant relationships including: post-course PRCA-24 public speaking and public speaking change scores with CCCI; second CAI with NIS; pre-course PRCA-24 total, meetings, and interpersonal scores with NIS; and post-course PRCA-24 total, group, meetings and interpersonal scores with NIS

Feminist pedagogical requirements of vulnerability in writing failure: Bad claims and worse reviews

Our students have limited perception of their faculty based on our classes, or for our graduate students in our publications. This is a potentially harmful for emerging scholars to understand faculty work only in its final form. Feminist scholars need to actively seek spaces in their courses to note the challenges and limitations of their own work[1]. In this critical commentary, I offer an overview of student standpoints, feminist possibilities and futures with less threating failures. The emotional and face threating vulnerability in failure by feminist scholars can create more welcoming failures moving forward

Clicking Instead of Speaking: The Impact of Students’ Communication Apprehension on Their Evaluation of Mediated Participation and Learning in the Basic Course

As research has well established the benefits to students of an engaged classroom, faculty are called to transform their classrooms into spaces focused on the learner (Petress, 2001). Though the basic course has traditionally been an engaged space, some formats of the basic course are limiting interaction. Researchers have argued that Student Response Systems (SRS) or “clickers” are one of the most promising technologies in transforming the classroom, particularly with the basic course, and offer venues for engagement for students particularly those who are most prone to avoid interaction. Nonetheless, many claims about these types of pedagogical tools have yet to be fully explored. This study looks to answer the question of how students within the basic course with high communication apprehension evaluate SRS, how they are limited in their participation in the classroom, how apprehension impacts their learning, and how these variables work together to explain more variance. Results indicate communication apprehension significantly predicts many of these variables and works with technology to mediate impact. Practical implications for the basic course, limitations of the study, and suggestions for future research are offered

The Thermal Environment of the Fiber Glass Dome for the New Solar Telescope at Big Bear Solar Observatory

The New Solar Telescope (NST) is a 1.6-meter off-axis Gregory-type telescope with an equatorial mount and an open optical support structure. To mitigate the temperature fluctuations along the exposed optical path, the effects of local/dome-related seeing have to be minimized. To accomplish this, NST will be housed in a 5/8-sphere fiberglass dome that is outfitted with 14 active vents evenly spaced around its perimeter. The 14 vents house louvers that open and close independently of one another to regulate and direct the passage of air through the dome. In January 2006, 16 thermal probes were installed throughout the dome and the temperature distribution was measured. The measurements confirmed the existence of a strong thermal gradient on the order of 5 degree Celsius inside the dome. In December 2006, a second set of temperature measurements were made using different louver configurations. In this study, we present the results of these measurements along with their integration into the thermal control system (ThCS) and the overall telescope control system (TCS).Comment: 12 pages, 11 figures, submitted to SPIE Optics+Photonics, San Diego, U.S.A., 26-30 August 2007, Conference: Solar Physics and Space Weather Instrumentation II, Proceedings of SPIE Volume 6689, Paper #2

Sunspot group tilt angle measurements from historical observations

Sunspot positions from various historical sets of solar drawings are analysed with respect to the tilt angles of bipolar sunspot groups. Data by Scheiner, Hevelius, Staudacher, Zucconi, Schwabe, and Spoerer deliver a series of average tilt angles spanning a period of 270 years, additional to previously found values for 20th-century data obtained by other authors. We find that the average tilt angles before the Maunder minimum were not significantly different from the modern values. However, the average tilt angles of a period 50 years after the Maunder minimum, namely for cycles 0 and 1, were much lower and near zero. The normal tilt angles before the Maunder minimum suggest that it was not abnormally low tilt angles which drove the solar cycle into a grand minimum.Comment: accepted by Advances in Space Researc

Giant anisotropy of Zeeman splitting of quantum confined acceptors in Si/Ge

Shallow acceptor levels in Si/Ge/Si quantum well heterostructures are characterized by resonant tunneling spectroscopy in the presence of high magnetic fields. In a perpendicular magnetic field we observe a linear Zeeman splitting of the acceptor levels. In an in-plane field, on the other hand, the Zeeman splitting is strongly suppressed. This anisotropic Zeeman splitting is shown to be a consequence of the huge light hole-heavy hole splitting caused by a large biaxial strain and a strong quantum confinement in the Ge quantum well.Comment: 5 figures, 4 page

Doing Feminist Interpersonal Communication Research: A Call for Action, Two Methodological Approaches, and Theoretical Potentials

Manning, J., & Denker, K. J. (2015). Doing feminist interpersonal communication research: A call for action, two methodological approaches, and theoretical potentials. Women & Language, 38(1), 133-142. Authors have rights to distribute published article.What does it mean to " do " feminist interpersonal communication research? Interpersonal communication studies hold great potential for practical insights into how relationships are (en)gendered, informed (and even constituted) by patriarchal histories, and subject to cultural and institutional inequalities based on the identities of those in (or not in) a given relationship. Unfortunately, little research has embraced feminist approaches to interpersonal communication studies. In this essay, we seek to remedy this shortcoming by exploring some of the ways that interpersonal communication scholars can continue to integrate feminist approaches and perspectives into their work. We specifically examine two possibilities: feminist-informed participatory action research and integrating feminist critique into empirical interpersonal communication studies. As our arguments in this essay reflect, we believe that these particular approaches, similar to other feminist methodological possibilities, have the potential to impact interpersonal communication axiology and praxeology. To set the scene for these methodologies, we first overview feminist approaches to research and theorizing in the communication discipline as a whole as well as in interpersonal communication studies.Organization for the Study of Communication, Language, and Gende