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US secretary of state Marco Rubio says Central American nation is violating canal treaty’s neutrality clause

Experts warn aggressive trade measures against US allies will hurt consumers and roil supply chains

【今月発売の電子書籍】「歴史文化ライブラリー」新刊2点について

タイトル: Supporting program comprehension with data-enhanced active reading著者: Toyokawa, Yuko; Prasad, Prajish; Horikoshi, Izumi; Majumdar, Rwitajit; Ogata, Hiroaki抄録: This study proposes a novel pedagogical approach to applying active reading (AR) strategies and the learning analytics dashboard to program comprehension (PC) in programming courses. The objective was to visualize the code-reading behaviors of novice programming learners using learning logs and promote code comprehension. The strategy was applied to students in computer science classes at a liberal arts college in India. The results show that the utilization of the dashboard positively influenced students’ learning behaviors outside the classroom. It was recognized as an effective means of supporting PC, highlighting the need to elaborate on how to adopt dashboards in code reading tasks. The study confirms that reflecting on learning using the dashboard can promote learners’ metacognitive skills, regardl ...

タイトル: Photo-Assisted Bottom-Up Synthesis of Orange Phosphorus著者: Qiu, Pengcheng; Wang, Jiameng; Kojima, Takahiro; Kazumi, Kenji; Sato, Hiroyasu; Komatsu, Naoki; Fukami, Kazuhiro; Sakaguchi, Hiroshi抄録: A tubular strand of phosphorus composed of vectorially aligned pentagons has been theoretically predicted as a new allotrope of phosphorus with a polar structure, expecting potential applications. However, it has not been successfully synthesized yet due to the difficulty of creating isolated strands to avoid interchain bonding. Here, such an allotrope named “orange phosphorus“ was successfully produced using a photo-assisted synthesis from an amorphous film of solution-processable Na₂P₁₆ precursors. A green laser irradiation initiated the phase transition of precursors, inducing chemical reactions like topochemical polymerization and rearrangement, creating a 1D chain of orange phosphorus. 3D electron diffraction crystallography showed that the molecular structu ...

Keir Starmer to join Nato and European leaders at summit on boosting security

US president’s aggressive actions have kick-started a ‘Buy Canadian’ campaign across the border

System disburses trillions of dollars in US government spending each year, including social security

Tariffs on Canada, Mexico and China will harm America’s own economy and diplomatic power