421 research outputs found

    Assessment for learning and cognitive process dimensions literacy of instructors in English

    Get PDF
    The general problem of this study was to determine the literacy level of instructors in English on assessment for learning and cognitive process dimensions in terms of the following parameters such as classroom assessment objective, classroom assessment theoretical basis, types of tests, content, and performance standards and competencies, and cognitive process dimensions. To achieve this aim, the researchers involved five university administrators, 15 instructors in English, and 225 college students during the school year 2020-2021. The questionnaire on the literacy level of instructors in English on the assessment of learning and cognitive process dimensions was utilized. The results were processed using statistical packages for social sciences (SPSS) and presented using appropriate tables and texts. The findings revealed that: first, although instructors in English are utilizing specific, measurable, attainable, relevant, and time-bound (SMART) learning objectives, they still have to distinguish between three learning domains; secondly, while instructors in English are excellent in identifying the diversity of students, they have to look for various assessment tools; third, though they have flexibility in crafting learning goals, and assess students holistically, they need to be familiar with levels of cognitive process in achieving profound assessment for learning

    Low temperature dielectric anomalies in HoMnO_3: The complex phase diagram

    Full text link
    The dielectric constant of multiferroic hexagonal HoMnO_3 exhibits an unprecedented diversity of anomalies at low temperatures (1.8 K< T <10 K) and under external magnetic fields related to magnetic phase transitions in the coupled system of Ho moments, Mn spins, and ferroelectric polarization. The derived phase diagram is far more complex than previously assumed including reentrant phases, phase transitions with distinct thermal and field hysteresis, as well as several multicritical points. Magnetoelastic interactions introduce lattice anomalies at the magnetic phase transitions. The re-evaluation of the T-H phase diagram of HoMnO_3 is demanded.Comment: 12 pages, 3 figure

    Strong spin-lattice coupling in multiferroic HoMnO3_{3}: Thermal expansion anomalies and pressure effect

    Full text link
    Evidence for a strong spin-lattice coupling in multiferroic HoMnO_3 is derived from thermal expansion measurements along a- and c-axis. The magnetoelastic effect results in sizable anomalies of the thermal expansivities at the antiferromagnetic (T_N) and the spin rotation (T_{SR}) transition temperatures as well as in a negative c-axis expansivity below room temperature. The coupling between magnetic orders and dielectric properties below T_N is explained by the lattice strain induced by the magnetoelastic effect. At T_{SR} various physical quantities show discontinuities that are thermodynamically consistent with a first order phase transition

    Pressure-Temperature Phase Diagram of Multiferroic Ni3V2O8Ni_3V_2O_8

    Full text link
    The pressure-temperature phase diagram of multiferroic Ni3V2O8Ni_3V_2O_8 is investigated for hydrostatic pressures up to 2 GPa. The stability range of the ferroelectric phase associated with the incommensurate helical spin order is reduced by pressure and ferroelectricity is completely suppressed at the critical pressure of 1.64 GPa at 6.2 K. Thermal expansion measurements at ambient pressure show strong step-like anomalies of the lattice parameters associated with the lock-in transition into the commensurate paraelectric phase. The expansion anomalies are highly anisotropic, the related volume change is consistent with the high-pressure phase diagram
    • …
    corecore