2,113 research outputs found

    Mechanisms For Implementing Assessments in The Independent Curriculum: Analytical Study In Educational Institutions

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    The Merdeka Curriculum is an innovative concept in the world of education in Indonesia that aims to provide flexibility and freedom to teachers in designing more creative and innovative learning methods and materials. One of these things is the assessment process. Assessment in the Merdeka Curriculum refers to the evaluation process carried out to measure students' abilities and skills effectively, objectively, and accurately. Assessment aims to provide an overview of the extent to which students have achieved the competencies set out in the curriculum. In addition, assessment also provides feedback to students and teachers regarding student learning progress and assists in identifying weaknesses and strengths in teaching and learning. In its implementation, assessment or judgment plays an important role in the success of this successful program. The Merdeka Curriculum assessment itself is a series of activities carried out to determine the level of students' abilities in a lesson in the Merdeka Curriculum. The government has regulated learning and assessment in the Merdeka Curriculum in full and in detail. It is hoped that this regulated learning and assessment can serve as a reference for teachers in planning and implementing meaningful learning so that it can create more creative, critical thinking, and innovative students

    Attraction Between Like-Charge Surfaces in Polar Mixtures

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    We examine the force between two charged surfaces immersed in aqueous mixtures having a coexistence curve. For a homogeneous water-poor phase, as the distance between the surfaces is decreased, a water-rich phase condenses at a distance DtD_t in the range 1-100nm. At this distance the osmotic pressure can become negative leading to a long-range attraction between the surfaces. The osmotic pressure vanishes at a distance De<DtD_e<D_t, representing a very deep metastable or globally stable energetic state. We give analytical and numerical results for DtD_t and DeD_e on the Poisson-Boltzmann level.Comment: 6 pages, 6 figure

    Solvo-osmotic flow in electrolytic mixtures

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    We show that an electric field parallel to an electrically neutral surface can generate flow of electrolytic mixtures in small channels. We term this solvo-osmotic flow, since the flow is induced by the asymmetric preferential solvation of ions at the liquid-solid interface. The generated flow is comparable in magnitude to the ubiquitous electro-osmotic flow at charged surfaces, but for a fixed surface charge density, it differs qualitatively in its dependence on ionic strength. Solvo-osmotic flow can also be sensitively controlled with temperature. We derive a modified Helmholtz-Smoluchowski equation that accounts for these effects.Comment: 11 pages, 4 figure

    Self-propulsion mechanism of active Janus particles in near-critical binary mixtures

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    Gold-capped Janus particles immersed in a near-critical binary mixture can be propelled using illumination. We employ a non-isothermal diffuse interface approach to investigate the self-propulsion mechanism of a single colloid. We attribute the motion to body forces at the edges of a micronsized droplet that nucleates around the particle. Thus, the often-used concept of a surface velocity cannot account for the self-propulsion. The particle's swimming velocity is related to the droplet shape and size, which is determined by a so-called critical isotherm. Two distinct swimming regimes exist, depending on whether the droplet partially or completely covers the particle. Interestingly, the dependence of the swimming velocity on temperature is non-monotonic in both regimes.Comment: 5 pages, 3 figure
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