Mahdi Molavi | Senior Backend Engineer & Tensor Researcher https://mahdimolavi.ir/ en Mahdi Molavi | Senior Backend Engineer & Tensor Researcher DataLife Engine Backend Notes 3: Minimal APIs for a Real .NET Service https://mahdimolavi.ir/backend-notes/27-backend-notes-3-minimal-apis-real-dotnet-service.html https://mahdimolavi.ir/backend-notes/27-backend-notes-3-minimal-apis-real-dotnet-service.html Backend Notes 3: Minimal APIs for a Real .NET Service

Structuring a Minimal API service that stays readable at fifty endpoints: feature folders, route groups, TypedResults, validation, ProblemDetails, output caching, rate limiting, health checks, an upgrade path from .NET 6/8 and integration tests.

]]> admin Mon, 19 Oct 2026 10:00:00 +0330 Tensor Notes 3: tc-SVD, a Tensor SVD with a Mirror Boundary https://mahdimolavi.ir/tensor-decompose/17-tensor-notes-3-tc-svd-mirror-boundary.html https://mahdimolavi.ir/tensor-decompose/17-tensor-notes-3-tc-svd-mirror-boundary.html Tensor Notes 3: tc-SVD, a Tensor SVD with a Mirror Boundary

The t-SVD quietly assumes your data wraps around along its third mode. Swapping that for a mirror boundary gives the tc-product and tc-SVD: real arithmetic through the DCT and consistently shorter run times.

]]> admin Thu, 15 Oct 2026 10:00:00 +0330 Backend Notes 2: Adaptive Testing with IRT Behind an API https://mahdimolavi.ir/backend-notes/25-backend-notes-2-adaptive-testing-irt-item-selection-api.html https://mahdimolavi.ir/backend-notes/25-backend-notes-2-adaptive-testing-irt-item-selection-api.html Backend Notes 2: Adaptive Testing with IRT Behind an API

How an IRT-based adaptive test picks every next question: 1PL to 3PL models, EAP ability estimates, maximum information with exposure control and content balancing, and an API that stays responsive at exam peaks.

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