73,049 dates through a numerology rule: mostly mod 9, and 33's rarity depends on when you reduce
The usual headline is that 33 is the rarest Life Path, about half a percent. Half a percent of what, reduced in which order? Change the order, to anot…
DevOps
⚑ Report a ProblemLatest DevOps news from Tech News
All topics
agents
ai
api
architecture
automation
aws
backend
beginners
career
database
devchallenge
devops
docker
javascript
kubernetes
llm
machinelearning
mcp
opensource
performance
productivity
programming
python
security
showdev
softwareengineering
testing
tutorial
typescript
webdev
We Tracked 143,424 AI Citations. Nearly Half Point Back to the Vendors Being Recommended
Why I started counting citations At Orbator we ask ChatGPT, Claude, Gemini, Perplexity, and Grok the same buyer-style questions — "best CRM for a 10-p…
What Building Cricket Analytics Taught Me About Data Visualization
When most people watch a cricket match, they notice the obvious moments—a six into the stands, a fast bowler taking a wicket, or a last-over finish th…
Importance of Hypothesis Testing in Data Science
A hypothesis is a clear, testable statement about a population or process. Hypothesis testing then uses sample data to decide whether there is enough …
When the Picture Doesn't Match the Label — Part 2: Feature-Based Detection with OCR and VQA
This is Part 2 of a two-part series. Part 1 covered the problem, the CLIP baseline, and BLIP. This part covers the OCR + VQA pipeline that replaced th…
Stop Writing .isnull() — Audit Your Dataset in One Line with OMR
Every time I start a new data project, I write the same boilerplate: python df.isnull().sum() df.duplicated().sum() df.dtypes df.describe() df[df['age…
RFM Segmentation for B2B SaaS: An 11-Segment Model to Cut Churn (with Python)
Most retention teams treat their customer base like a single audience. One email sequence. One renewal push. One "we miss you" campaign. Then they won…
We Checked Whether On-Site SEO Predicts AI Citations. The Data Says Mostly No.
Every GEO ("generative engine optimization") tool, including ours until recently, sells some version of the same pitch: fix your robots.txt, add Schem…
Why Federal Reform Picks AI‑Native Outcome Integrators
Executive summary Federal procurement is shifting from labor-based buys toward fixed-price, outcome-focused contracts—and that change alters who wins …
Design + Product Thinking: NYC’s Path to Reliable AI
Design + Product Thinking: NYC’s Path to Reliable AI AI delivers value when it’s useful, trusted, and operational. For city services that affect milli…
We graded 13 famous trading strategies on 6 years of data. All 13 failed.
( https://tessen.ai/strategies ) Every trading book, YouTube channel, and Discord server teaches the same classics: RSI mean-reversion, the golden cro…
A no-code way to scrape live World Cup betting odds
This World Cup has been full of upsets — Norway knocking out Brazil, Cabo Verde drawing with both Spain and Uruguay, all four pre-tournament favorites…
What Building an AI Detector Taught Me About False Positives
The first time we ran our AI content checker on a batch of student essays, one thing became immediately clear: the detector was more confident than we…
Meta-Analysis: Between-Study Heterogeneity
Adapted from an appendix of my MS thesis. Between-Study Heterogeneity The extent to which true effect sizes vary within a meta-analysis is called betw…
Scaffolding Business Domain Models with Dynamic Schemas
This article kicks off our new "Core Platform Capabilities" series Operational platforms require structured data, but rigid database schemas slow down…
Memprediksi Peluang Klub Promosi Bertahan di Liga Top Eropa — Part 1: Kickoff & Rencana
series: Prediksi Survival Klub Debutan Kenapa Project Ini? Setiap musim, klub yang promosi ke liga top (Premier League, La Liga, dst.) menghadapi risi…
Markov Chain Monte Carlo: Theoretical Foundations
Adapted from an appendix of my MS thesis. Markov Chain Monte Carlo Almost as soon as computers were invented, they were used for simulation. Markov ch…
Why Is the Normal Distribution So Important in Machine Learning and Statistics?
If you've started learning machine learning or statistics, you've probably encountered the term normal distribution countless times. Whether you're re…
I tracked every trending AI repo's stars daily for 3 weeks. The growth is not where I expected
I run a small AI trends site, and three weeks ago I started doing something simple: every day, snapshot the star count of every repo that crosses my G…
From Raw Prices to Real Signals: Financial Metrics for a Data Pipeline (Daily Return, MA, RSI, MACD, Volatility)
In this article I will share my understanding and use of some financial metrics used in my Financial Dashboard project. You can see it in this link an…
A CSV sample that looks like the whole dataset is worse than no CSV at all
I've been building data2prompt for a few months now. It takes a data-heavy project (CSVs, SQL dumps, notebooks, Excel files) and turns it into a singl…
How ICD-10 Codes Map to an HCC / RAF Score (and Why the Same Code Set Yields Different Scores)
If you're building anything that touches Medicare Advantage risk adjustment, sooner or later you hit this question: "How do ICD-10 codes map to an HCC…
Bootstrapped Data Products — Here's What I Learned
I'm Heshan. I build data products. No VC, no team — just me, a lot of Playwright scripts, and PostgreSQL. Two years ago I couldn't build anything that…
Translate Chinese University Projects into US Data Engineering Bullets
Why Chinese University Projects Need a US Rewrite Recruiters at US companies scan resumes for 6-10 seconds. They expect bullets that prove you can do …
How to Build a Point-in-Time Fundamentals Database from SEC EDGAR (and When Not To)
If you backtest with today's fundamentals, you are cheating yourself. The Revenue figure you pull for Q4 2019 was probably restated in 2021, and the r…
How to Get Canadian Charity Data by API (2026)
Canada has about 85,000 registered charities , and the Canada Revenue Agency (CRA) publishes the whole list as open data — legal names, mailing addres…
From My Machine to the Cloud: Connecting Power BI to SQL Databases; PostgreSQL (Local vs Aiven)
Introduction I used to think "connecting to a database" was one skill. Turns out it's two: connecting to a database chilling quietly on your own lapto…
How to Get Canadian Government Tenders by API (2026 Guide)
Canada's governments buy over $200 billion in goods and services every year. Every tender is public — but the data is scattered across a dozen portals…
How Netflix Knows What You Want to Watch: Matrix Factorization & Architecture
How Netflix Knows What You Want to Watch: Matrix Factorization & Architecture Have you ever finished a binge-worthy series on Netflix, only for th…
# Turning Data Quality Checks into a Measurable Trust Score
Most data quality problems do not announce themselves loudly. They do not always break a pipeline. They do not always throw an exception. They do not …