ZhiZhi Gewu
Subscribe
Sign in
Home
Notes
Latest
Top
AI in My Daily Workflow: Use Cases and Reflections
The Last Human Job: Deciding What We Want
Feb 20
•
KY John
The Risk Metric Translation Layer: Why Precision and FPR Aren't Mirror Images
Sometimes, I found it inefficient to communicate the antifraud team's performance metrics, such as precision and false positive rate, to other teams or…
Feb 7
•
KY John
1
January 2026
Absence of Evidence ≠ Evidence of Absence: Rethinking Fraud Prevention KPIs
The Zero-Incident Paradox: Why Silence Isn't Always Golden in Fraud Prevention Using Bayesian reasoning to measure what you cannot directly observe
Jan 24
•
KY John
2
Can You Solve This? Calculating KS from a Quarter-Circle ROC Curve
I recently came across an interesting interview question that bridges geometry and risk modeling: “If a model’s ROC curve is a perfect concave down…
Jan 11
•
KY John
1
December 2025
Same Math, Different Enemies: The Unit Economics of Credit and Fraud Risk
In my previous post, I discussed standard risk metrics like AUC, KS, Precision, and Recall.
Dec 28, 2025
•
KY John
AUC, KS, Precision, and Recall: A Risk Analyst’s Guide
As analysts in the risk management industry, we live and breathe acronyms like AUC (Area Under the Curve) and KS (Kolmogorov-Smirnov).
Dec 20, 2025
•
KY John
1
It’s Not the Chaos, It’s the Expectation: A Framework for Deconstructing Anxiety
Recently, I’ve spent time reflecting on the problem of anxiety.
Dec 13, 2025
•
KY John
1
November 2025
The Art of Problem Solving: Defining the Gap and Trusting the Process
Do you have friends who seem naturally better at problem-solving?
Nov 23, 2025
•
KY John
1
October 2025
My Singapore Property Purchase Journey (Resale Condo Edition)
A Data-Driven, Step-by-Step Guide to Navigating the Singapore Resale Condo Journey — from Budgeting and Valuation to Negotiation and Completion
Oct 25, 2025
•
KY John
Viewing Loan Core as a State Machine
How computational theory reveals the hidden order behind lending systems.
Oct 19, 2025
•
KY John
3
Can Publication Data Predict Technology Breakthroughs? Analyzing 500+ Years of Innovation
How Ideas Appear in Print Before They Transform the World
Oct 12, 2025
•
KY John
From Domestication to AI: What Each General Purpose Technology GPT Unlocked—and How to Use the Lessons
Lessons from past waves for the age of AI
Oct 4, 2025
•
KY John
1
This site requires JavaScript to run correctly. Please
turn on JavaScript
or unblock scripts
