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R. Cardona

Publications and source records attributed to R. Cardona.

2 recordsLinked to original sources

California Community Colleges: Designing mentoring networks for access to social capital

Successful careers are built on Skills (what you know), Occupational Identity (what you believe you can be) and Social Capital (who you know). Higher-ed spends significant resources in addressing the first, sometimes to the exclusion of the other two - which are difficult and expensive to teach and administer. This research specifically explores how near-peer mentoring programs, rather than a stand-alone opt-in guidance, can be integrated into the instruction/pedagogy by faculty at California community colleges. The research was conducted at 5 California community colleges (Reedley, Porterville, Coalinga, Solano and Glendale). A mixed-methods approach was used to gather social cognitive measures of student self-efficacy, occupational identity and social capital access. Measures were collected using survey instruments at the beginning of the mentoring program, and at its culmination. One of the most consistent measures observed across all the pilots was the increase in student self-efficacy of skills and competencies (3% - 7%) across colleges, geographies, and course formats after the mentoring program. Additionally, the research offers insights in implementing peer and near-peer mentoring programs that improve course completion, with significant instructional (and non-instructional) cost advantages.

econ.GN

Structure, ferromagnetic, dielectric and electronic features of the LaBiFe2O6 material

In this paper the synthesis and study of the structural, morphological, electrical, magnetic and electronic properties of the LaBiFe2O6 novel material are reported. The material was produced using the standard ceramic method. The Rietveld analysis of experimental data of x-ray diffraction showed that it synthesizes in an orthorhombic perovskite structure (Pnma, #62 space group). Two types of grain, micro and submicrometric, with the LaBiFe2O6 stoichiometry were identified by scanning electron microscopy and X-ray dispersive spectroscopy. Results of electrical polarization and dielectric constant ferroelectric suggest the occurrence of response of the material at room temperature. A T=300 K the material is ferromagnetic and exhibits an anomaly at T=258 K, which is attributed to anisotropy effects, suggesting the occurrence of biferroic behaviour. Results of diffuse reflectance suggest a semiconductor behaviour with energy gap Eg=2,17 eV, which is in agreement with calculations of band structure and density of states for one spin orientation, while for the other spin configuration calculations suggest a conductor feature.

cond-mat.mtrl-sci