标题： FullBrain：一个社交式在线学习平台 显示英文标题

标题： FullBrain: a Social E-learning Platform

摘要： 我们介绍了FullBrain，一个社交在线学习平台，学生可以在其中分享和跟踪他们的知识。 FullBrain用户可以在专用的课程和概念空间中发布笔记、提问和分享学习资源。 我们详细介绍了FullBrain的两个组件：一个配备查询自动补全和查询自动建议的SIR系统，以及一个排行榜模块以提升用户体验。 我们分析了日常用户使用SIR系统的数据，测量到完成请求的时间低于0.11秒，达到或超过了我们的用户体验目标。 此外，我们进行了压力测试，为更详细的分析奠定了基础。 通过初步的用户研究和日志数据分析，我们观察到97%的用户活动集中在排行榜的前4位。 显示英文摘要

摘要： We present FullBrain, a social e-learning platform where students share and track their knowledge. FullBrain users can post notes, ask questions and share learning resources in dedicated course and concept spaces. We detail two components of FullBrain: a SIR system equipped with query autocomplete and query autosuggestion, and a Leaderboard module to improve user experience. We analyzed the day-to-day users' usage of the SIR system, measuring a time-to-complete a request below 0.11s, matching or exceeding our UX targets. Moreover, we performed stress tests which lead the way for more detailed analysis. Through a preliminary user study and log data analysis, we observe that 97% of the users' activity is directed to the top 4 positions in the leaderboard.