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A Multilingual Research Assistant Is Still an Infrastructure Project

TL;DR for operators A specialised research platform does not need to discard its documents, metadata, search history, licensing rules, or expert workflows to add an AI assistant. ReSearch_SSH1 instead proposes a modular layer over the existing ISIDORE infrastructure. The design combines multilingual domain adaptation with retrieval that connects documents through authors, institutions, themes, citations, and other relationships rather than returning isolated text matches. Most retrieval, reranking, generation, and public knowledge components could be reused elsewhere. ...

August 4, 2026 · 9 min · Zelina
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The Mask Is Not the Model: MMIR-TCM Makes Clinical Memory Inspectable

TL;DR for operators How should a clinical AI system move from a noisy image to a recommendation without hiding every judgment inside one model? The practical answer is to separate image standardization, structured interpretation, retrieval, and recommendation generation so each stage can be inspected, corrected, and validated independently. MMIR-TCM’s strongest evidence comes from removing those supports one at a time. Clinical-case memory produced the largest overall loss in prescription reasoning when removed. Formal diagnostic-theory memory mattered most for syndrome differentiation, while removing tongue findings particularly weakened prescription generation. By contrast, tongue segmentation—the architecture’s most visible component—improved semantic performance only modestly. ...

July 28, 2026 · 8 min · Zelina
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Route Cause Analysis: Stop Sending Every AI Failure to Training

TL;DR for operators An AI failure is an observation, not a diagnosis. A low benchmark score, an incorrect answer, or a broken agent run does not tell you whether the underlying problem belongs in the training data, model objective, retrieval policy, procedural instructions, tool interface, or execution environment. Treating all of these as “model quality” produces expensive interventions with weak causal logic. ...

July 22, 2026 · 19 min · Zelina
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The Smart Chunker Did Not Earn Its Keep

TL;DR for operators RAG teams often want to believe that a smarter chunking method will rescue messy document retrieval. It is a tidy belief. It is also the sort of tidy belief that tends to become a budget line. The paper behind this article tests that belief in a small, practical setting: thirteen academic theses, ten questions per thesis, three chunking strategies, and a self-hosted RAG stack constrained by 16 GiB of VRAM.1 The strategies are familiar: fixed-size chunks, recursive format-aware chunks, and cluster-based semantic chunks. The expensive-sounding one, cluster-based semantic chunking, does not consistently win. ...

July 9, 2026 · 16 min · Zelina
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MARCH Orders: When AI Holds a CT Case Conference

The useful meeting, unfortunately, exists Meetings are usually where productivity goes to file a complaint. But there is one kind of meeting that high-stakes work still needs: the review session where a first draft is challenged, evidence is checked, and a senior decision-maker signs off. Radiology has long understood this. A resident may draft the report. A fellow may question the interpretation. An attending radiologist resolves the remaining uncertainty. The point is not ceremony. The point is controlled disagreement. ...

April 22, 2026 · 16 min · Zelina
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The Search That Remembers: Training AI Without Answers

Search looks cheap until you try to train it. A business can usually collect plenty of questions. Employees ask support bots why a policy changed. Analysts ask internal search systems for comparable transactions. Legal teams ask where a contract clause first appears. Researchers ask agents to chase a multi-step trail across documents, web pages, and databases. ...

April 15, 2026 · 17 min · Zelina
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Entropy Over Relevance: Why Your RAG System Is Asking the Wrong Questions

Evidence is not context. That is the small, expensive misunderstanding behind many enterprise RAG systems. A user asks a question, the system retrieves semantically similar chunks, the model reads them, and the answer arrives with a tone that suggests the matter has been settled. Very reassuring. Sometimes even correct. But in the situations where RAG is supposed to be most useful — compliance reviews, financial analysis, legal memos, medical evidence summaries, internal strategy briefings — the problem is often not that the system has too little relevant material. The problem is that the relevant material disagrees, overlaps, dates badly, or supports several competing interpretations at once. ...

March 31, 2026 · 18 min · Zelina
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Seeing Is Believing: Why Visual RAG Might Be the Missing Layer in Clinical AI

Guidelines are not novels. That sounds obvious until we remember how most retrieval-augmented generation systems treat them. A clinical guideline becomes text. The text becomes chunks. The chunks become embeddings. The embeddings become “context.” Somewhere in that mechanical conversion, a dosing table, a referral pathway, or a threshold hidden inside a flowchart quietly loses its shape. Then everyone acts surprised when the answer is fluent but clinically thin. Very mysterious. ...

March 24, 2026 · 13 min · Zelina
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CompactRAG: When Multi-Hop Reasoning Stops Burning Tokens

Ask a normal enterprise RAG system a simple factual question, and it behaves politely enough. Retrieve a few passages. Hand them to the model. Generate an answer. Fine. Ask it a question that requires two or three steps, and the machine starts developing expensive habits. It retrieves, reasons, retrieves again, expands the prompt, reasons again, rewrites a query, retrieves more evidence, and then asks the LLM to stitch the mess together. The architecture looks intellectually serious. The invoice looks even more serious. ...

February 8, 2026 · 16 min · Zelina
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When Retrieval Learns to Breathe: Teaching LLMs to Go Wide *and* Deep

Retrieval has a breathing problem. Most enterprise RAG systems inhale once, grab the nearest chunks, and then hope the model can make the answer sound less fragile than the evidence actually is. That works tolerably well when the user asks for something sitting neatly inside a document paragraph. It works less well when the answer lives across entities, relations, aliases, product categories, authors, diseases, suppliers, regulations, or customer records. In other words, it works less well in the part of business where knowledge is not a pile of text but a network. ...

January 21, 2026 · 18 min · Zelina