Computational modeling of sketch understanding is interesting both scientifically and for creating systems that interact with people more naturally. Scientifically, understanding sketches requires modeling aspects of visual processing, spatial representations, and conceptual knowledge in an integrated way. Software that can understand sketches is starting to be used in classrooms, and it could have a potentially revolutionary impact as the models and technologies become more advanced. This paper looks at one such effort, Sketch Worksheets, which have been used in multiple classroom (...) experiments already, with students ranging from elementary school to college. Sketch Worksheets are a software equivalent of pencil and paper worksheets commonly found in classrooms, but they provide on-the-spot feedback based on what students draw. They are built on the CogSketch platform, which provides qualitative visual and spatial representations and analogical processing based on computational models of human cognition. This paper explores three issues. First, we examine how research from cognitive science and artificial intelligence, combined with the constraints of creating new kinds of educational software, led to the representations and processing in CogSketch. Second, we examine how these capabilities have been used in Sketch Worksheets, drawing upon experiments with fifth-grade students in biology and college students in engineering design and in geoscience. Finally, we examine some open issues in sketch understanding that need to be addressed to better model high-level aspects of vision, and for sketch understanding systems to reach their full potential for supporting education. (shrink)

Research from cognitive science and geoscience education has shown that sketching can improve spatial thinking skills and facilitate solving spatially complex problems. Yet sketching is rarely implemented in introductory geosciences courses, due to time needed to grade sketches and lack of materials that incorporate cognitive science research. Here, we report a design-centered, collaborative effort, between geoscientists, cognitive scientists, and artificial intelligence researchers, to characterize spatial learning challenges in geoscience and to design sketch activities that use a sketch-understanding program, CogSketch. We (...) developed 26 CogSketch worksheets that use cognitive science–based principles to scaffold problem solving of spatially complex geoscience problems and report observations of an implementation in an introductory geoscience course where students used CogSketch or human-graded paper worksheets. Overall, this research highlights the principles of interdisciplinary design between cognitive scientists, geoscientists, and AI researchers that can inform the collaborative design process for others aiming to develop effective educational materials. (shrink)

En diciembre del 2019, en la provincia de Wuhan, China, se describió una nueva enfermedad respiratoria, aguda y potencialmente letal, causada por un coronavirus. A esta enfermedad se le denominó Covid-19. En México, la mortalidad por esta enfermedad es elevada y un porcentaje importante de los enfemos muere en los hospitales. Por ahora no existe en México un protocolo específico en el sistema de salud tanto público como privado, para que las familias puedan decirle adiós a los enfermos con Covid-19. (...) Un panel de expertos en cuidados paliativos y bioética proponen uno, para que pueda servir como referencia en cada unidad de salud de nuestro país. (shrink)

自由的核心概念在康德的建構中，除了奠定了道德法則與法權法則的普遍性、必然性與約束性之外，它還有一個軸心的關鍵作用，居間連結道德哲學與法權哲學。自由是實踐哲學的基本概念，藉此設定，康德業已以不言而喻的必 然方式，將法權哲學的法權論，與倫理學的德行論，一併歸編列於道德哲學的大系統之內。這樣一個大系統的建構，反過來使法權哲學的法權論能夠具有道德形上學的向度，從外在的強制法，通過意念的反思建立德行，成為可能 。再透過理性本體之自由理念的溯源，自由基本人權明確顯示的，即是「人作為人」不可冒犯的尊嚴。在康德通過道德法則的理性事實證成自由理念的客觀真實性之後，我們可以合理地倒反過來，從存有的觀點來鳥瞰他的道德哲 學的這整個系統的基本架構，是透過一個核心作用的統籌運用：從作為核心的自由概念出發，一方面「縱向貫徹」，另外一方面「橫向一致」，動態交錯地開展出來。.