An algorithm for assembling square jigsaw puzzles is presented. We commence by introducing criteria that govern the selection of proper jigsaw puzzle solving method for a given application. Our algorithm uses the gray level profiles of border pixels for local matching of the puzzle pieces. Unlike the classical best-first search, the algorithm simultaneously locates the neighbors of a puzzle pie...

BACKGROUND This three-part study examines previous clinical impressions that people with Prader-Willi syndrome have unusual jigsaw puzzle and word search skills. RESULTS Children with Prader-Willi syndrome showed relative strengths on standardized visual-spatial tasks (Object Assembly, Triangles, VMI) in that their scores were significantly higher than age- and IQ-matched peers with mixed men...

This paper presents a novel encryption-less algorithm to enhance security in transmission of data in networks. The algorithm uses an intuitively simple idea of a ‘jigsaw puzzle’ to break the transformed data into multiple parts where these parts form the pieces of the puzzle. Then these parts are packaged into packets and sent to the receiver. A secure and efficient mechanism is provided to con...

Pengembangan pendidikan ilmu pengetahuan alam (IPA) perlu ditingkatkan baik dari segi perencanaan, penggunaan metode, alat peraga maupun kapasitas guru untuk mengembangkan semua kurikulum dan praktis IPA. Hal ini berguna mempersiapkan peserta didik menghadapi perkembangan zaman ekonomi global, harus mampu manusia yang bersaing dalam kemajuan teknologi peningkatan pengetahuan. Tujuan riset berik...

This paper compared two collaborative activities for college students' integration of research pieces of cognitive science. One is the jigsaw method that assigns different pieces to different students and makes them exchange what they learn. The other is a simpler type of collaboration that gives all pieces to all students in a serial order. Comparing the results, we found that the jigsaw promo...

Spatial reasoning ability is enhanced by spatial activities and spatial language. Spatial games (e.g., block building, assembling jigsaw puzzles) are often accompanied by spatial language, which, in turn, is often accompanied by co-speech gesture. Here we investigate the effects of spatial language and gesture in the context of puzzle play in improving preschool children’s puzzle assembly abili...

Many online courses fail to promote the active construction of student knowledge or camaraderie among student peers. Accordingly, online course designers and instructors are challenged to promote purposeful peer student dialogue and establish a sense of belonging where all learners perceive themselves as stakeholders in the course community. Online role playing is not a common activity, and ele...

This paper presents an innovative description of the Jigsaw collaboration method within the context of open source e-learning ‘Learning Design’-based systems such as LAMS, with special reference to the learning of essential issues in Computer Science. These issues include: (a) the wide range of computer technology used in daily life and the consequences of such utilization, (b) the variety of c...

Cortical microtubules (MTs) participate in the spatial control of cell expansion and division that is required for plant growth and morphogenesis. Well-ordered transverse cortical MTs promote cell elongation and restrict radial cell expansion. The molecular mechanism controlling their ordering is poorly understood. We report the first known signaling pathway that promotes the organization of co...