Feasibility study of an Integrated Program for Aerospace-vehicle Design (IPAD) system. Volume 2: Characterization of the IPAD system, phase 1, task 1

The aircraft design process is discussed along with the degree of participation of the various engineering disciplines considered in this feasibility study

Anisotropic admixture in color-superconduting quark matter

Théori

Monological Practices, Authoritative Discourses and the Missing C in Digital Communities

The purpose of this study was to examine teacher decisions surrounding opportunities for student voice, experiences and beliefs in digital classroom communities. The teachers’ decisions reflect monologic rather than dialogic teacher pedagogies which prompted the authors to ask the following question: What led to these teacher-centered practices in digital environments? Authoritative discourses in school policies and a missing connection between critical pedagogies and teachers’ technology practices are examined in light of teachers’ decisions to engage in monologic and/or dialogic teaching practices. The authors propose professional development and research that emphasize pedagogy that supports student voice as foundational to practices involving digital literacies. Examination of the teachers’ decisions showed monologic practices void of student opportunities to critically engage in digital environments. Dominant discourses imposed through protectionist and digital citizenship policies of schools as well as lack of opportunity through professional development to connect critical pedagogy to technology impacted the teachers’ decisions. Current research surrounding teachers’ digital literacies uses the TPACK framework to examine technology integration practices. Missing is a critical component that addresses and works to dismantle the dominant discourses and power structures in digital communities (Hosek, 2018). The authors build on research in critical digital literacies to argue for adding the critical missing “C” into the TPACK framework (C-TPACK) to move researchers and educators to consider pedagogies that examine ideologies at work in digital communities to provide opportunities for student voice. Keywords: Digital literacy, TPACK, Authoritative discourse, C-TPACK, Critical digital literacy, Dominant discours

Forecasting severe ice storms using numerical weather prediction: the March 2010 Newfoundland event

The northeast coast of North America is frequently hit by severe ice storms. These freezing rain events can produce large ice accretions that damage structures, frequently power transmission and distribution infrastructure. For this reason, it is highly desirable to model and forecast such icing events, so that the consequent damages can be prevented or mitigated. The case study presented in this paper focuses on the March 2010 ice storm event that took place in eastern Newfoundland. We apply a combination of a numerical weather prediction model and an ice accretion algorithm to simulate a forecast of this event. <br><br> The main goals of this study are to compare the simulated meteorological variables to observations, and to assess the ability of the model to accurately predict the ice accretion load for different forecast horizons. The duration and timing of the freezing rain event that occurred between the night of 4 March and the morning of 6 March was simulated well in all model runs. The total precipitation amounts in the model, however, differed by up to a factor of two from the observations. The accuracy of the model air temperature strongly depended on the forecast horizon, but it was acceptable for all simulation runs. The simulated accretion loads were also compared to the design values for power delivery structures in the region. The results indicated that the simulated values exceeded design criteria in the areas of reported damage and power outages

Pedagogy, Gender, and Communication: Learning and Unlearning Gender

Courses in gender communication are designed to enable students to examine the role of gender and gender identity in everyday communication. To aid them to understand gender communication, they should be exposed to at least three foundational areas and supporting content. Sex and gender differences, the social construction of gender, and theoretical gender lenses (biological, psychological, and critical/cultural) are critical foundations that students should grasp to recognize the complexity of gender and gender communication

A Direct Stellar Metallicity Determination in the Disk of the Maser Galaxy NGC4258

We present the first direct determination of a stellar metallicity in the spiral galaxy NGC4258 (D=7.6 Mpc) based on the quantitative analysis of a low-resolution (~5 AE) Keck LRIS spectrum of a blue supergiant star located in its disk. A determination of stellar metallicity in this galaxy is important for the absolute calibration of the Cepheid Period-Luminosity relation as an anchor for the extragalactic distance scale and for a better characterization of its dependence as a function of abundance. We find a value 0.2 dex lower than solar metallicity at a galactocentric distance of 8.7 kpc, in agreement with recent HII region studies using the weak forbidden auroral oxygen line at 4363 AE. We determine the effective stellar temperature, gravity, luminosity and line-of-sight extinction of the blue supergiant being studied. We show that it fits well on the flux-weighted gravity--luminosity relation (FGLR), strengthening the potential of this method as a new extragalactic distance indicator.Comment: Accepted for publication by ApJ Letters, 5 pages, 5 figure