Simple manipulation of a microwave dressed-state ion qubit

Many schemes for implementing quantum information processing require that the atomic states used have a non-zero magnetic moment, however such magnetically sensitive states of an atom are vulnerable to decoherence due to fluctuating magnetic fields. Dressing an atom with an external field is a powerful method of reducing such decoherence [N. Timoney et al., Nature 476, 185], even if the states being dressed are strongly coupled to the environment. We introduce an experimentally simpler method of manipulating such a dressed-state qubit, which allows the implementation of general rotations of the qubit, and demonstrate this method using a trapped ytterbium ion

Report from solar physics

A discussion of the nature of solar physics is followed by a brief review of recent advances in the field. These advances include: the first direct experimental confirmation of the central role played by thermonuclear processes in stars; the discovery that the 5-minute oscillations of the Sun are a global seismic phenomenon that can be used as a probe of the structure and dynamical behavior of the solar interior; the discovery that the solar magnetic field is subdivided into individual flux tubes with field strength exceeding 1000 gauss. Also covered was a science strategy for pure solar physics. Brief discussions are given of solar-terrestrial physics, solar/stellar relationships, and suggested space missions

Proposing a Haptic Approach to Facilitating L2 Learners\u27 Pragmatic Competence

Pragmatic competence plays a critical role in successful communication. Pragmatics in the second language classroom has received substantial interest in TESOL, yet teachers often find the teaching of pragmatics challenging. Instruction generally tends to focus on grammar and vocabulary development, even though pragmatics is closely linked to the sound system (i.e., phonology) of the language. An effective method should combine attention to both pragmatic and phonological competence. We propose an integrated approach, drawing on haptic (movement and touch) pronunciation teaching techniques (Acton, Baker, Burri & Teaman, 2013) to facilitate study and uptake of pragmatics in the classroom. In part by mapping intonation and rhythm onto select prefabricated, high value language chunks - adding systematic gestures, movement, and touch - students\u27 ability to respond more appropriately in social context should be significantly enhanced. The process described is accessible to most experienced practitioners. The paper concludes with recommended applications in various educational settings

Exploring the Structure of Distant Galaxies with Adaptive Optics on the Keck-II Telescope

We report on the first observation of cosmologically distant field galaxies with an high order Adaptive Optics (AO) system on an 8-10 meter class telescope. Two galaxies were observed at 1.6 microns at an angular resolution as high as 50 milliarcsec using the AO system on the Keck-II telescope. Radial profiles of both objects are consistent with those of local spiral galaxies and are decomposed into a classic exponential disk and a central bulge. A star-forming cluster or companion galaxy as well as a compact core are detected in one of the galaxies at a redshift of 0.37+/-0.05. We discuss possible explanations for the core including a small bulge, a nuclear starburst, or an active nucleus. The same galaxy shows a peak disk surface brightness that is brighter than local disks of comparable size. These observations demonstrate the power of AO to reveal details of the morphology of distant faint galaxies and to explore galaxy evolution.Comment: 5 pages, Latex, 3 figures. Accepted for publication in P.A.S.

Mariner Mars 1971 optical navigation demonstration

The feasibility of using a combination of spacecraft-based optical data and earth-based Doppler data to perform near-real-time approach navigation was demonstrated by the Mariner Mars 71 Project. The important findings, conclusions, and recommendations are documented. A summary along with publications and papers giving additional details on the objectives of the demonstration are provided. Instrument calibration and performance as well as navigation and science results are reported

Reinventing EdD Research Methods Courses

The education doctorate program fills an essential niche that allows practitioners to earn a doctorate and make a difference in educational practice and policy. However, critics claim EdD programs are failing to effectively prepare students. There has been a push for the reinvention of the EdD which includes improving EdD student confidence in their ability to undertake research. This calls for a redesign of research methods courses and purposefully grounding them in adult learning theory. The framework of transformative learning can foster higher-order learning by including key components such as critical reflection, collaborative dialogue, and awareness of context. This article shares a transformative learning model used to redevelop an EdD research methods course that emphasised self-reflective tasks such as identity memos, research design maps, and cognitive interviews. This learner-centred, constructivist approach resulted in positive learning outcomes including increased student confidence and enhanced practical knowledge and research skills