Usability: Navigation
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The document discusses usability testing of website navigation. It notes that navigation helps users find what they are looking for, tells them where they are and what is available, and builds confidence in the website. The document then recommends simplifying navigation elements, providing navigation for multiple browsing behaviors, and using methods like silent observation, talk-aloud protocols and interviews to test navigation usability. Testers should develop protocols including browsing prompts, behavior coding, and information presentation formats.
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Graph ML and GenAI Expert - Neo4j
"Scaling RAG Applications to serve millions of users", Kevin Goedecke
How we managed to grow and scale a RAG application from zero to thousands of users in 7 months. Lessons from technical challenges around managing high load for LLMs, RAGs and Vector databases.
zkStudyClub - LatticeFold: A Lattice-based Folding Scheme and its Application...
Folding is a recent technique for building efficient recursive SNARKs. Several elegant folding protocols have been proposed, such as Nova, Supernova, Hypernova, Protostar, and others. However, all of them rely on an additively homomorphic commitment scheme based on discrete log, and are therefore not post-quantum secure. In this work we present LatticeFold, the first lattice-based folding protocol based on the Module SIS problem. This folding protocol naturally leads to an efficient recursive lattice-based SNARK and an efficient PCD scheme. LatticeFold supports folding low-degree relations, such as R1CS, as well as high-degree relations, such as CCS. The key challenge is to construct a secure folding protocol that works with the Ajtai commitment scheme. The difficulty, is ensuring that extracted witnesses are low norm through many rounds of folding. We present a novel technique using the sumcheck protocol to ensure that extracted witnesses are always low norm no matter how many rounds of folding are used. Our evaluation of the final proof system suggests that it is as performant as Hypernova, while providing post-quantum security.
Paper Link: https://eprint.iacr.org/2024/257
Dandelion Hashtable: beyond billion requests per second on a commodity server
This slide deck presents DLHT, a concurrent in-memory hashtable. Despite efforts to optimize hashtables, that go as far as sacrificing core functionality, state-of-the-art designs still incur multiple memory accesses per request and block request processing in three cases. First, most hashtables block while waiting for data to be retrieved from memory. Second, open-addressing designs, which represent the current state-of-the-art, either cannot free index slots on deletes or must block all requests to do so. Third, index resizes block every request until all objects are copied to the new index. Defying folklore wisdom, DLHT forgoes open-addressing and adopts a fully-featured and memory-aware closed-addressing design based on bounded cache-line-chaining. This design offers lock-free index operations and deletes that free slots instantly, (2) completes most requests with a single memory access, (3) utilizes software prefetching to hide memory latencies, and (4) employs a novel non-blocking and parallel resizing. In a commodity server and a memory-resident workload, DLHT surpasses 1.6B requests per second and provides 3.5x (12x) the throughput of the state-of-the-art closed-addressing (open-addressing) resizable hashtable on Gets (Deletes).
Mutation Testing for Task-Oriented Chatbots
Conversational agents, or chatbots, are increasingly used to access all sorts of services using natural language. While open-domain chatbots - like ChatGPT - can converse on any topic, task-oriented chatbots - the focus of this paper - are designed for specific tasks, like booking a flight, obtaining customer support, or setting an appointment. Like any other software, task-oriented chatbots need to be properly tested, usually by defining and executing test scenarios (i.e., sequences of user-chatbot interactions). However, there is currently a lack of methods to quantify the completeness and strength of such test scenarios, which can lead to low-quality tests, and hence to buggy chatbots.
To fill this gap, we propose adapting mutation testing (MuT) for task-oriented chatbots. To this end, we introduce a set of mutation operators that emulate faults in chatbot designs, an architecture that enables MuT on chatbots built using heterogeneous technologies, and a practical realisation as an Eclipse plugin. Moreover, we evaluate the applicability, effectiveness and efficiency of our approach on open-source chatbots, with promising results.
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Usability: Navigation
- 1. Testing Navigation Usability Wednesday, January 25, 12
- 2. People won’t use our site if they can’t find their way around it. Wednesday, January 25, 12
- 3. Wednesday, January 25, 12
- 4. Wednesday, January 25, 12
- 5. Browsing Searching Wednesday, January 25, 12
- 6. Wednesday, January 25, 12
- 7. 1. You’re usually trying to find something. Wednesday, January 25, 12
- 8. 2. You decide whether to ask or browse first. Wednesday, January 25, 12
- 9. 3. If you browse, you use signs to guide you. Wednesday, January 25, 12
- 10. Wednesday, January 25, 12
- 11. Wednesday, January 25, 12
- 12. Fiction & Literature Wednesday, January 25, 12
- 13. Best Sellers Wednesday, January 25, 12
- 14. Collins, Suzanne Wednesday, January 25, 12
- 15. Wednesday, January 25, 12
- 16. 4. If you can’t find what you want, you’ll leave. Wednesday, January 25, 12
- 18. Wednesday, January 25, 12
- 19. Navigation does 4 things: Wednesday, January 25, 12
- 20. • Helps us find what we’re looking for • Tells us where we are • Tells us what’s here • It gives us confidence in the people who built it. Wednesday, January 25, 12
- 21. Simplified Elements: Wednesday, January 25, 12
- 22. Persistent Navigation Wednesday, January 25, 12
- 23. Site ID Wednesday, January 25, 12
- 24. Local Navigation Wednesday, January 25, 12
- 25. Wednesday, January 25, 12
- 26. Provide navigation for multiple browsing behaviors Wednesday, January 25, 12
- 27. Let’s take a look. Wednesday, January 25, 12
- 28. Now, let’s figure out how to test for this. Wednesday, January 25, 12
- 29. 1. Choose your methods. Wednesday, January 25, 12
- 30. • Silent observation • Talk-aloud protocols • Entrance-exit interviews Wednesday, January 25, 12
- 31. Develop a protocol Wednesday, January 25, 12
- 32. • Browsing prompts • Behavior coding • Interval times • Coding sheet formats • Final info presentation formats Wednesday, January 25, 12
- 33. Develop browsing prompts Wednesday, January 25, 12