Developing tools for learning oriented assessment of interactional competence: bridging theory and practice

In this paper we report on a project in which we developed tools to support the classroom assessment of learners’ interactional competence (IC) and provided learning oriented feedback in the context of preparation for a high-stakes face-to-face speaking test.  Six trained examiners provided stimulated verbal reports (n=72) on 12 paired interactions, focusing on interactional features of candidates’ performance. We thematically analyzed the verbal reports to inform a draft checklist and materials, which were then trialled by four experienced teachers. Informed by both data sources, the final product comprised (a) a detailed IC checklist with nine main categories and over 50 sub-categories, accompanying detailed description of each area and feedback to learners, which teachers can adapt to suit their teaching and testing contexts, and (b) a concise IC checklist with four categories and bite-sized feedback for real-time classroom assessment. IC, a key aspect of face-to-face communication, is under-researched and under-explored in second/foreign language teaching, learning, and assessment contexts. This in-depth treatment of it, therefore, stands to contribute to learning contexts through raising teachers’ and learners’ awareness of micro-level features of the construct, and to assessment contexts through developing a more comprehensive understanding of the construct

A Geometrically Supported z∼10z\sim10 Candidate Multiply-Imaged by the Hubble Frontier Fields Cluster Abell 2744

The deflection angles of lensed sources increase with their distance behind a given lens. We utilize this geometric effect to corroborate the $z_{phot}\simeq9.8$ photometric redshift estimate of a faint near-IR dropout, triply-imaged by the massive galaxy cluster Abell 2744 in deep Hubble Frontier Fields images. The multiple images of this source follow the same symmetry as other nearby sets of multiple images which bracket the critical curves and have well defined redshifts (up to $z_{spec}\simeq3.6$), but with larger deflection angles, indicating that this source must lie at a higher redshift. Similarly, our different parametric and non-parametric lens models all require this object be at $z\gtrsim4$, with at least 95\% confidence, thoroughly excluding the possibility of lower-redshift interlopers. To study the properties of this source we correct the two brighter images for their magnifications, leading to a SFR of $\sim0.3 M_{\odot}$/yr, a stellar mass of $\sim4\times10^{7} M_{\odot}$, and an age of $\lesssim220$ Myr (95\% confidence). The intrinsic apparent magnitude is 29.9 AB (F160W), and the rest-frame UV ($\sim1500 \AA$) absolute magnitude is $M_{UV,AB}=-17.6$. This corresponds to $\sim0.1 L^{*}_{z=8}$ ($\sim0.2 L^{*}_{z=10}$, adopting $dM^{*}/dz\sim0.45$), making this candidate one of the least luminous galaxies discovered at $z\sim10$.Comment: 7 pages, 4 figures, 1 table; V2: very minor changes, ApJ Letters Accepte

Shape memory-based actuators and release mechanisms therefrom

SM-based actuators (110) and release mechanisms (100) therefrom and systems (500) including one or more release mechanisms (100). The actuators (110) comprise a SM member (118) and a deformable member (140) mechanically coupled to the SM member (118) which deforms upon a shape change of the SM member triggered by a phase transition of the SM member. A retaining element (160) is mechanically coupled to the deformable member (140), wherein the retaining element (160) moves upon the shape change. Release mechanism (100) include an actuator, a rotatable mechanism (120) including at least one restraining feature (178) for restraining rotational movement of the retaining element (160) before the shape change, and at least one spring (315) that provides at least one locked spring-loaded position when the retaining element is in the restraining feature and at least one released position that is reached when the retaining element is in a position beyond the restraining feature (178). The rotatable mechanism (120) includes at least one load-bearing protrusion (310). A hitch (400) is for mechanically coupling to the load, wherein the hitch is supported on the load bearing protrusion (310) when the rotatable mechanism is in the locked spring-loaded position

Gambaran Umum Perawatan Ulcus Diabeticum Pada Pasien Rawat Inap Di Rumah Sakit Immanuel Bandung Periode Juli 2007-Agustus 2008

The treatment of diabetic ulcer will determine its outcome. The purpose of this study is to describe the general treatment of diabetic ulcer in Immanuel Hospital Bandung, in July 2007--August 2008. The data of this descriptive-retrospective study were collected from the medical records of the hospitalized patients during that period. There were 41 patients: 37% male, 63% female, 46% > 60 years old, 39% 45-60, and 15% 15-45 years old. Conventional dressing was applied to 63% patients, while the 37% were given advanced dressing. Necrotomy-debridement procedure was used to treat 83% patients. Whereas IV nutrition supplementation was given to 7% patients, subcutaneous insulin was given to the patients in 46% cases. The patients hospitalized less than three days were 12% (40% dead case, 40% amputated, 20% discharged without improvement). The patients hospitalized for 3-4 days were 49% (65% with improvement, 10% without improvement, 15% amputated, 10% dead case), The patients hospitalized > 7 days were 39% (52.94% with improvement, 5.88% without improvement, 35.29% amputated, and no dead case). Cases treated with advanced dressing, necrotomy debridement procedure, IV nutrition supplementation and without subcutaneous insulin showed a better outcome; those showing improvement respectively were 86.67%, 55.88%, 54.54%, 63.63%, and those showing shorter hospitalization period respectively  were 80%, 47.05%, 63.63%, 54.54%

Validity of self-measured waist and hip circumferences: results from a community study in Malaysia

Background: Measures of central adiposity are better predictors of adverse health events than BMI. Nonetheless, BMI is more widely used in health research. One reason for this may be the limited research supporting the self-measurement of waist and hip circumference. The lack of validity studies is particularly acute in Asia. The main objective was to establish the validity of self-measurement of waist and hip circumference in a community setting and the correlation of those measures with BMI, blood pressure, and blood glucose levels. Methods. A community based, cross-sectional survey. A "healthy living expo" at a shopping mall in a rural town on peninsular Malaysia One hundred and thirty six (136) individuals volunteered to participate in the study, 125 of whom met the inclusion criteria. The ethnic distribution of the participants was 80% Chinese, 17% Malay and 3% Indian. Most participants were female (60%), with participants' ages ranging from 18 to 78 years (mean, 47.2). Self and assisted measurements of waist and hip were taken. Blood pressure, non-fasting blood glucose, height, and weight were also measured. Bland Altman plots and Lin's concordance coefficient were used to measure agreement between self and assisted measures. Pearson's correlation was used to examine the association of self and assisted measures with blood pressure, blood glucose, and BMI. Results: There was a downwards bias in self measured waist (-0.81 cm) and hip (-1 cm) circumferences compared with assisted measures. The concordance for the self and assisted measures of waist, hip and the ratio of the two were, respectively,.96,.93, and.84. The correlation between measures of central adiposity and BMI, blood pressure and blood glucose were similar for self and assisted measures. Conclusion: The results provide additional support for the use of self-measurement of waist and hip circumference studies of central adiposity, but is limited by the specificity of the setting. © 2013 Reidpath et al.; licensee BioMed Central Ltd

Picometer level displacement metrology with digitally enhanced heterodyne interferometry

Digitally enhanced heterodyne interferometry is a laser metrology technique employing pseudo-random codes phase modulated onto an optical carrier. We present the first characterization of the technique’s displacement sensitivity. The displacement of an optical cavity was measured using digitally enhanced heterodyne interferometry and compared to a simultaneous readout based on conventional Pound-Drever-Hall locking. The techniques agreed to within 5 pm/√Hz at 1 Hz, providing an upper bound to the displacement noise of digitally enhanced heterodyne interferometry. These measurements employed a real-time signal extraction system implemented on a field programmable gate array, suitable for closed-loop control applications. We discuss the applicability of digitally enhanced heterodyne interferometry for lock acquisition of advanced gravitational wave detectors

Experimental demonstration of a squeezing enhanced power recycled Michelson interferometer for gravitational wave detection

Interferometric gravitational wave detectors are expected to be limited by shot noise at some frequencies. We experimentally demonstrate that a power recycled Michelson with squeezed light injected into the dark port can overcome this limit. An improvement in the signal-to-noise ratio of 2.3dB is measured and locked stably for long periods of time. The configuration, control and signal readout of our experiment are compatible with current gravitational wave detector designs. We consider the application of our system to long baseline interferometer designs such as LIGO.Comment: 4 pages 4 figure

What counts as ‘responding’? Contingency on previous speaker contribution as a feature of interactional competence

The ability to interact with others has gained recognition as part of the L2 speaking construct in the assessment literature and in high- and low-stakes speaking assessments. This paper first presents a review of the literature on interactional competence (IC) in L2 learning and assessment. It then discusses a particular feature – producing responses contingent on previous speaker contribution – that emerged as a de facto construct feature of IC oriented to by both candidates and examiners within the school-based group speaking assessment in the Hong Kong Diploma of Secondary Education (HKDSE) English Language Examination. Previous studies have, similarly, argued for the importance of ‘responding to’ or linking one’s own talk to previous speakers’ contributions as a way of demonstrating comprehension of co-participants’ talk. However, what counts as such a response has yet to be explored systematically. This paper presents a conversation analytic study of the candidate discourse in the assessed group interactions, identifying three conversational actions through which student-candidates construct contingent responses to co-participants. The thick description about the nature of contingent responses lays the groundwork for further empirical investigations on the relevance of this IC feature and its proficiency implications