A study log of the B.S. in Data Science at ITAM, one entry per term: the mathematics and statistics underneath, the computing, the economics, and the humanities the programme insists on. Written as I go, in the first person.https://rubo6.dev/en-ushttps://rubo6.dev/log/de-los-temarios-a-las-estrellas/https://rubo6.dev/log/de-los-temarios-a-las-estrellas/Every star in the skills section now carries a provenance: the course, job or project behind it. How I rebuilt the official programmes of Bátiz and ITAM, and what I decided not to claim.Sat, 05 Sep 2026 12:00:00 GMTComputingskillssyllabiITAMBátiztransparencythis sitehttps://rubo6.dev/log/whisperflow-dictado-sin-nube/https://rubo6.dev/log/whisperflow-dictado-sin-nube/I wanted the convenience of cloud dictation without giving away my voice. WhisperFlow is the result: offline push-to-talk for Windows with two swappable speech engines, a native orb overlay and a threat model written before the code.Fri, 04 Sep 2026 12:00:00 GMTComputingWhisperFlowspeech recognitionONNXprivacyWin32Pythonprojectshttps://rubo6.dev/log/pulsares-faros-que-marcan-el-tiempo/https://rubo6.dev/log/pulsares-faros-que-marcan-el-tiempo/A pulsar is a neutron star spinning tens of times per second, sweeping the sky with a beam of radiation. How they were discovered by accident, why they are the most precise clocks in the universe, and what they have to do with a data degree.Fri, 04 Sep 2026 12:00:00 GMTAstronomyastronomypulsarsneutron starsCrabtime seriesoutreachhttps://rubo6.dev/log/helice-jwst-2026/https://rubo6.dev/log/helice-jwst-2026/The Helix Nebula is a Sun-like star in its final phase, only 650 light-years away. In January 2026 Webb released a view of its cometary knots that is the image of this page's Personal category. What it shows and why I chose it.Fri, 04 Sep 2026 12:00:00 GMTAstronomyastronomyHelixplanetary nebulaJWSTwhite dwarfoutreachhttps://rubo6.dev/log/carina-vivero-de-estrellas/https://rubo6.dev/log/carina-vivero-de-estrellas/The Carina Nebula is the image that opens this page's observatory and the one I chose for the academic category. What it is, what the James Webb telescope saw in the Cosmic Cliffs, and why a place where stars are born is the right metaphor for a school.Fri, 04 Sep 2026 12:00:00 GMTAstronomyastronomynebulaeCarinaJWSTstar formationoutreachhttps://rubo6.dev/log/por-que-mi-sitio-calcula-el-cielo/https://rubo6.dev/log/por-que-mi-sitio-calcula-el-cielo/The sky on the home page is not a decorative animation: it is the sky above Mexico City at the moment you open the page, computed with sidereal time and a change of coordinates. Here is the mathematics, and why the degree made it easy.Thu, 03 Sep 2026 12:00:00 GMTAstronomyastronomysidereal timecoordinatesspherical trigonometryTypeScripttestshttps://rubo6.dev/log/octavo-semestre-big-data-multivariados/https://rubo6.dev/log/octavo-semestre-big-data-multivariados/What I am taking now: architecture for large data volumes, data mining and analysis, multivariate methods and the first half of Applied Data Science, which since this fall can replace the thesis. What I hope to get out of each.Tue, 01 Sep 2026 12:00:00 GMTData science & AIbig dataSparkprincipal componentsdata miningapplied projectthesishttps://rubo6.dev/log/inferencia-causal-mpi-etica/https://rubo6.dev/log/inferencia-causal-mpi-etica/Linear Methods and Causal Inference gave rigour to the question of whether X causes Y; Parallel Computing had me write an MPI Bag-of-Words in C++; Artificial Intelligence opened the box of agents; and the ethics seminar reminded me that data belongs to people.Fri, 05 Jun 2026 12:00:00 GMTProbability & statisticsregressiongeneralized linear modelscausal inferencedifference in differencesinstrumental variablesMPIC++data ethicsprivacyhttps://rubo6.dev/log/bag-of-words-paralelo-mpi/https://rubo6.dev/log/bag-of-words-paralelo-mpi/The Parallel Computing project: implement Bag-of-Words serially and in parallel with MPI in C++17, compare two ways of splitting documents across processes, and discover that intuition loses to the stopwatch.Mon, 15 Dec 2025 12:00:00 GMTComputingMPIC++17parallelismpartitioningDockerbenchmarkprojectshttps://rubo6.dev/log/ecobox-ai-coordinar-investigacion/https://rubo6.dev/log/ecobox-ai-coordinar-investigacion/At DataLab ITAM I was part of the ECOBOX AI team, a computer-vision model for classifying waste. We delivered the model and a paper; the hard part was not the technique but doing research with people who have exams.Wed, 10 Dec 2025 12:00:00 GMTData science & AIcomputer visionimage classificationDataLabcoordinationdocumentationsustainabilityprojectshttps://rubo6.dev/log/estadistica-matematica-aprendizaje-de-maquina/https://rubo6.dev/log/estadistica-matematica-aprendizaje-de-maquina/Mathematical Statistics and Machine Learning in the same term are the best pairing in the curriculum: one tells you why an estimator works and the other what happens when you let it loose on data. In November I started working in data at Mercado Pago Point.Fri, 05 Dec 2025 12:00:00 GMTData science & AImaximum likelihoodCramér-RaoNeyman-Pearsonbias-variancetreesregularizationvisualizationBigQueryhttps://rubo6.dev/log/mi-primera-entrevista/https://rubo6.dev/log/mi-primera-entrevista/I had never done a job interview. The first one was for Mercado Libre, competing with candidates from ITAM, UNAM and Tec. What they asked, why I was shaking, and what I would do differently.Mon, 03 Nov 2025 12:00:00 GMTWorkMercado Libreinterviewfirst jobcareernerveshttps://rubo6.dev/log/fuentes-de-datos-nosql-teoria-de-juegos/https://rubo6.dev/log/fuentes-de-datos-nosql-teoria-de-juegos/Data Sources and Non-Relational Databases had me extracting and structuring real-world data; Probability II closed with the law of large numbers and the central limit theorem; Market Design taught me to think in incentives.Fri, 06 Jun 2025 12:00:00 GMTComputingAPIsweb scrapingJSONNoSQLMongoDBcentral limit theoremgame theoryauctionshttps://rubo6.dev/log/keeper-save-probability-interpretable/https://rubo6.dev/log/keeper-save-probability-interpretable/Keeper Save Probability: a prototype to estimate the chance a goalkeeper makes the save, built with logistic regression, Monte Carlo uncertainty and a grid search over positions. Why I chose the simplest model on purpose.Fri, 30 May 2025 12:00:00 GMTData science & AIlogistic regressionMonte Carloentropyinterpretabilityfootballscikit-learnprojectshttps://rubo6.dev/log/aiesec-liderar-un-equipo-a-los-veinte/https://rubo6.dev/log/aiesec-liderar-un-equipo-a-los-veinte/A year at AIESEC in ITAM: hosting foreign volunteers in social projects in Mexico City, then leading a three-person team that sends students abroad. What I learned about funnels, 1:1s and working English.Fri, 13 Dec 2024 12:00:00 GMTLeadershipAIESECleadershipvolunteeringSDGsstakeholdersEnglishKPIshttps://rubo6.dev/log/probabilidad-bases-de-datos-historia-mexico/https://rubo6.dev/log/probabilidad-bases-de-datos-historia-mexico/The term where real statistics began, with Probability I, and where databases stopped being tables and became a formal model. Also the term of Mexican history, from the viceroyalty to the Porfiriato.Fri, 06 Dec 2024 12:00:00 GMTProbability & statisticsprobabilityBayesSQLnormalizationACIDMexican historyhttps://rubo6.dev/log/estructuras-de-datos-calculo-iii-marx/https://rubo6.dev/log/estructuras-de-datos-calculo-iii-marx/Data Structures gave me the vocabulary for computational cost; Calculus III, constrained optimization; and the last part of Ideas and Institutions, the critiques of the world the first two had built.Fri, 07 Jun 2024 12:00:00 GMTComputingdata structurescomplexitygraphsLagrangemacroeconomicsMarxNietzschehttps://rubo6.dev/log/demostrar-algebra-lineal-hobbes/https://rubo6.dev/log/demostrar-algebra-lineal-hobbes/The second term gave me the language I still use: proofs by induction, eigenvalues, least squares as geometry, and Modernity from Hobbes to Kant read aloud.Fri, 08 Dec 2023 12:00:00 GMTMathematicsproofsinductionlinear algebraeigenvaluesleast squaresHobbesKanthttps://rubo6.dev/log/primer-semestre-calculo-economia-platon/https://rubo6.dev/log/primer-semestre-calculo-economia-platon/What the first term of Data Science at ITAM taught me: that the degree is mathematics before it is code, and that reading Plato on Tuesday and differentiating on Thursday is not a contradiction but the design.Sat, 10 Jun 2023 12:00:00 GMTMathematicscalculusvectorsmicroeconomicsPlatofirst termhttps://rubo6.dev/log/batiz-tecnico-en-programacion/https://rubo6.dev/log/batiz-tecnico-en-programacion/I entered CECyT 9 "Juan de Dios Bátiz" on 13 August 2018 and left on 23 July 2021 with a bivalent diploma: a high-school certificate and a technical degree in programming. What is taught there, why it has the reputation it has, and what it left me.Fri, 23 Jul 2021 12:00:00 GMTComputingIPNCECyT 9BátizprogrammingOOPdatabasessoftware testingCOMIPEMS