Afleveringen
-
Episode 93 of The Data Science Podcast with Fexingo dives into Thompson Sampling, a Bayesian approach to online experimentation that balances exploration and exploitation better than traditional A/B testing. Lucas and Luna walk through a concrete example from a real e-commerce site that ran a 50-variant landing page test — and how Thompson Sampling found the winner in half the time with 30% less traffic wasted. They also discuss Thompson Sampling's role in multi-armed bandit problems, how it handles changing user behavior, and why it's becoming a go-to technique for data scientists in marketing and product optimization. Plus: a quick note on how listener support keeps the podcast ad-free.#ThompsonSampling #BayesianInference #MultiArmedBandit #OnlineExperiments #ABTesting #ExplorationExploitation #DataScience #MachineLearning #MarketingOptimization #ProductExperimentation #ECommerce #ConversionRate #BetaDistribution #BayesianStatistics #SequentialTesting #DataDriven #FexingoBusiness #BusinessPodcastKeep every episode free: buymeacoffee.com/fexingo
-
Episode 92 of The Data Science Podcast with Fexingo dives into embedded analytics—the practice of integrating dashboards, reports, and AI insights directly into customer-facing products. Lucas and Luna explore how companies like Notion and Canva use embedded analytics to drive product-led growth, reduce churn, and monetize data. They walk through a real case: a fictional B2B SaaS platform that cut customer onboarding time by 40% by embedding usage analytics inside its app. The hosts discuss the technical stack (frontend SDKs, API-first BI tools, semantic layers), the UX pitfalls to avoid (like overwhelming users with charts), and the business model shift from selling reports to embedding them. If you're a data scientist or product manager wondering how to turn dashboards into a growth engine, this episode gives you a concrete playbook.#EmbeddedAnalytics #ProductLedGrowth #DataScience #BusinessIntelligence #Analytics #Notion #Canva #B2BSaaS #CustomerRetention #Monetization #SemanticLayer #APIFirst #UX #ProductAnalytics #Technology #FexingoBusiness #BusinessPodcast #DataDrivenKeep every episode free: buymeacoffee.com/fexingo
-
Zijn er afleveringen die ontbreken?
-
Most marketing attribution models are correlational — they tell you what happened, not why. In this episode, Lucas and Luna break down how data scientists are using causal inference techniques, specifically double machine learning and instrumental variables, to measure the true incremental impact of ad spend. Using a real 2025 case from a mid-market e-commerce brand that ran geo-lift tests across 50 DMAs, they show how naive last-click attribution overestimated Facebook ROI by 60 percent while underestimating podcast ads by 40 percent. The hosts explain why off-the-shelf attribution is broken, how double ML handles high-dimensional confounders like seasonality and competitor activity, and why the field is shifting from 'more data' to 'better questions.' Specific metrics, concrete numbers, no vague theory.#CausalInference #MarketingAttribution #DataScience #DoubleMachineLearning #InstrumentalVariables #GeoLift #IncrementalMeasurement #ROI #DigitalMarketing #Tech #BusinessPodcast #DataDriven #Analytics #Econometrics #CausalEffect #Confounders #AdTech #FexingoBusinessKeep every episode free: buymeacoffee.com/fexingo
-
In this episode, Lucas and Luna explore how knowledge graphs are supercharging retrieval-augmented generation (RAG) systems. They break down a concrete example: how a financial services firm used a knowledge graph built from SEC filings and earnings call transcripts to reduce hallucination in their Q&A chatbot by 40 percent. The hosts explain why flat vector search alone often fails, how graph traversal adds context, and what it takes to maintain a dynamic knowledge graph. They also touch on trade-offs like latency and engineering complexity. If you've wondered when RAG needs more than a vector database, this episode gives you the practical answer.#KnowledgeGraphs #RAG #RetrievalAugmentedGeneration #Hallucination #VectorSearch #GraphTraversal #Neo4j #SECFilings #EarningsCalls #NLP #LLMOps #DataScience #Technology #FexingoBusiness #BusinessPodcast #MachineLearning #GraphDB #EntityResolutionKeep every episode free: buymeacoffee.com/fexingo
-
Lucas and Luna explore how graph neural networks are transforming recommendation systems, using the example of Pinterest's PinSage model. They break down how GNNs capture relational data like user-item interactions to generate high-quality recommendations, discuss the challenges of scaling to billions of nodes, and compare GNN-based approaches to traditional collaborative filtering. The episode includes a concrete explanation of message-passing in graphs and real-world performance metrics from Pinterest's deployment.#GraphNeuralNetworks #RecommendationSystems #Pinterest #PinSage #MachineLearning #DataScience #Technology #CollaborativeFiltering #MessagePassing #NodeEmbeddings #GraphConvolution #Scaling #UserItemGraph #IndustrialML #Personalization #FexingoBusiness #BusinessPodcast #DataDrivenKeep every episode free: buymeacoffee.com/fexingo
-
Episode 88 of The Data Science Podcast dives into dimensionality reduction — but not for preprocessing. Lucas and Luna explore how data scientists use t-SNE and UMAP to visualize high-dimensional data, from customer segmentation to single-cell genomics. They discuss the trade-offs between global and local structure preservation, the risk of over-interpreting clusters, and why a 2D plot is never the whole truth. With concrete examples from retail analytics and biology, this episode gives you a practical framework for when to use t-SNE versus UMAP and how to avoid common pitfalls. If you've ever stared at a scatter plot and wondered if the patterns are real, this one's for you.#DimensionalityReduction #tSNE #UMAP #DataVisualization #MachineLearning #DataScience #Clustering #HighDimensionalData #SingleCellGenomics #CustomerSegmentation #PCA #Interpretability #Visual Analytics #FeatureEngineering #UnsupervisedLearning #Technology #FexingoBusiness #BusinessPodcastKeep every episode free: buymeacoffee.com/fexingo
-
In episode 87 of The Data Science Podcast, Lucas and Luna explore manifold learning—a powerful technique for dimensionality reduction that goes beyond PCA. They focus on t-SNE and UMAP, explaining how these algorithms preserve local and global structure in high-dimensional data. Using concrete examples from genomics and image datasets, they discuss when to use each method and common pitfalls like misleading visualizations. Lucas shares a cautionary tale about a team that over-interpreted a t-SNE plot, while Luna explains how UMAP scales to millions of points. They also touch on recent developments like parametric UMAP and its integration with deep learning. Perfect for data scientists who want to understand the trade-offs between linear and nonlinear dimensionality reduction.#ManifoldLearning #DimensionalityReduction #tSNE #UMAP #DataScience #MachineLearning #PCA #DataVisualization #TopologicalDataAnalysis #Genomics #ImageData #KLDivergence #CrossEntropy #ParametricUMAP #FexingoBusiness #BusinessPodcast #Technology #DataSciencePodcastKeep every episode free: buymeacoffee.com/fexingo
-
In this episode, Lucas and Luna explore the concept of the Pareto frontier, a powerful framework for multi-objective optimization in data science. Starting with a concrete example—a ride-hailing company balancing driver wait times against passenger fares—they illustrate how Pareto optimality helps teams make trade-offs in model tuning, resource allocation, and product decisions. They discuss real-world applications in portfolio optimization, A/B testing, and reinforcement learning, where multiple conflicting objectives (e.g., profit vs. fairness, accuracy vs. latency) must be balanced. The hosts explain how to compute Pareto frontiers efficiently, why they're essential for interpretability, and how data scientists present these trade-offs to stakeholders. Tune in for a practical, example-driven conversation that will change how you think about optimization.#ParetoFrontier #MultiObjectiveOptimization #DataScience #MachineLearning #TradeOffs #Optimization #Tech #AIBusiness #ModelSelection #ReinforcementLearning #PortfolioOptimization #ABTesting #Fairness #Latency #Interpretability #FexingoBusiness #BusinessPodcast #DataDrivenKeep every episode free: buymeacoffee.com/fexingo
-
Lucas and Luna dive into Neural Radiance Fields (NeRFs), a technique that has reshaped 3D reconstruction from 2D images. They walk through how NeRFs work at a high level—converting sparse photographs into continuous volumetric scene representations—and why this matters for industries like autonomous driving, cultural heritage preservation, and virtual production. The episode anchors on a concrete example: how the Google Research team originally trained a NeRF on 100 images of a single scene to synthesize novel views with photorealistic quality, and how recent advances like Instant NGP have cut training time from hours to seconds. Lucas explains the key algorithmic steps: ray marching through a neural network that outputs color and density per point, then volumetric rendering to produce a pixel value. Luna questions where the bottleneck remains (data capture, not compute) and probes the real-world trade-off between quality and speed. The conversation stays grounded in tools and techniques data scientists actually use—no math beyond a brief mention of positional encoding—and closes by asking what happens when NeRFs meet generative AI for full scene editing.#NeuralRadianceFields #NeRF #3DReconstruction #ComputerVision #DeepLearning #InstantNGP #VolumetricRendering #RayMarching #GoogleResearch #PositionalEncoding #AutonomousDriving #VirtualProduction #CulturalHeritage #DataScience #Technology #FexingoBusiness #BusinessPodcast #MachineLearningKeep every episode free: buymeacoffee.com/fexingo
-
In this episode of The Data Science Podcast, Lucas and Luna explore how data scientists are using diffusion models — the technology behind tools like DALL-E and Stable Diffusion — for image generation. They break down the core idea of gradually denoising random pixels into coherent images, discuss training and inference costs, and contrast diffusion models with GANs and autoregressive models. Using a concrete example from a mid-size e-commerce company that used a fine-tuned diffusion model to generate product images in underrepresented categories, they walk through the practical pipeline: dataset preparation, conditioning on text prompts, and handling hallucination artifacts. Lucas explains why diffusion models have become the dominant paradigm in generative image AI since 2022, and Luna questions whether the compute cost will limit adoption for smaller teams. They also touch on ethical considerations around deepfakes and copyright. The episode is grounded in real numbers: training a latent diffusion model from scratch can cost upwards of $600,000 in compute, but fine-tuning an existing open-source model can be done for under $5,000.#DiffusionModels #ImageGeneration #GenerativeAI #DeepLearning #StableDiffusion #DALLE #ComputerVision #MachineLearning #Technology #DataScience #AIEthics #ComputeCost #FineTuning #TextToImage #DenoisingDiffusion #LatentDiffusion #FexingoBusiness #BusinessPodcastKeep every episode free: buymeacoffee.com/fexingo
-
In this episode, Lucas and Luna explore how data scientists apply transfer learning to solve image classification problems with very little labeled data. They break down the concrete steps: taking a pre-trained model like ResNet-50 trained on ImageNet's 14 million images, freezing early layers, fine-tuning later layers on a new task with as few as 50 images per class. Lucas shares a case study from a medical startup that used this approach to classify skin lesions from dermoscopic images with 94% accuracy using only 200 labeled samples. The hosts discuss practical gotchas including domain mismatch, learning rate selection, and the trade-off between freezing and fine-tuning. If today's conversation gave you a concrete technique you can use, consider supporting the show at buy me a coffee dot com slash fexingo.#TransferLearning #FewShotLearning #ImageClassification #DeepLearning #ResNet #ImageNet #FineTuning #FeatureExtraction #MedicalImaging #Dermatology #DomainAdaptation #PreTrainedModels #DataScience #MachineLearning #Technology #FexingoBusiness #BusinessPodcast #AIKeep every episode free: buymeacoffee.com/fexingo
-
Lucas and Luna dive into Bayesian A/B testing—why it's replacing frequentist methods for marketing experiments. They walk through a real case from a mid-size e-commerce company that used Bayesian inference to compare email subject lines, reaching a decision in half the time with clearer probability statements. The episode covers the core difference: instead of a p-value, you get a direct probability that version A beats version B. They explain how priors work, the role of Monte Carlo simulation, and a concrete example where a company saved thousands by avoiding a false negative. By the end, you'll understand why more data teams are adopting Bayesian methods for faster, more intuitive decision-making—and how to explain it to stakeholders without the math.#BayesianA/BTesting #DataScience #MachineLearning #MarketingAnalytics #Experimentation #ABTesting #BayesianInference #MonteCarlo #Priors #PosteriorProbability #Ecommerce #EmailMarketing #StatisticalMethods #DataDrivenMarketing #ConversionRate #Frequentist #Technology #FexingoBusiness #BusinessPodcastKeep every episode free: buymeacoffee.com/fexingo
-
Federated learning is reshaping how organisations train machine learning models on sensitive data without ever centralising it. In this episode, Lucas and Luna break down a real-world case: how a consortium of six European hospitals used federated learning to train a diagnostic model for rare paediatric cancers — achieving accuracy comparable to a centralised model while keeping each hospital's patient data behind its own firewall. They walk through the technical architecture: the role of a coordination server, how model updates are aggregated using FedAvg, and what happens when non-IID data distributions cause client drift. Luna pushes back on the communication cost argument, and Lucas explains how compression techniques and asynchronous updates are making federated learning practical at scale. They also touch on the regulatory angle — why GDPR and HIPAA are driving adoption faster than any technical breakthrough. Whether you're a data scientist evaluating privacy-preserving ML or just curious how Apple trains Siri without reading your keystrokes, this episode gives you the concrete mechanics behind a paradigm shift in distributed machine learning.#FederatedLearning #PrivacyPreservingML #DataScience #Technology #HealthcareAI #GDPR #HIPAA #FedAvg #FexingoBusiness #BusinessPodcast #MachineLearning #DistributedLearning #ModelAggregation #NonIIDData #ClientDrift #Siri #Apple #RareCancerDiagnosisKeep every episode free: buymeacoffee.com/fexingo
-
Episode 80 of The Data Science Podcast dives into Shapley values — a game-theoretic approach to explaining model predictions. Lucas walks through the core intuition: how Shapley values fairly distribute prediction contributions among features, using a concrete example from a credit approval model. Luna asks about the practical trade-offs, including computational cost with high-dimensional data. The hosts discuss real-world usage at a mid-sized fintech lender that reduced model risk by 30 percent after implementing Shapley-based explanations. They also touch on open-source libraries like SHAP and its Python implementation. The episode avoids dry math in favor of conceptual clarity, making it accessible to data scientists and business analysts alike. By the end, listeners understand why Shapley values are becoming the gold standard for regulatory compliance and stakeholder trust.#ShapleyValues #ModelInterpretability #ExplainableAI #XAI #GameTheory #SHAP #FeatureImportance #CreditModeling #Fintech #DataScience #MachineLearning #ModelRisk #Python #OpenSource #Interpretability #Technology #FexingoBusiness #BusinessPodcastKeep every episode free: buymeacoffee.com/fexingo
-
Episode 79 of The Data Science Podcast explores synthetic control — a causal inference method that estimates what would have happened to a treated unit if the intervention never occurred. Lucas and Luna break down a real-world case: how a ride-hailing company used synthetic control to measure the impact of a surge-pricing algorithm change on driver supply in Austin, Texas. They walk through building a synthetic control from a weighted combination of similar cities, interpreting the gap between actual and synthetic outcomes, and running placebo tests to assess statistical significance. The hosts also discuss when to choose synthetic control over difference-in-differences, the importance of having a strong donor pool, and how this method is gaining traction in policy evaluation and A/B testing for large-scale platform changes. No clickbait, just a practical, concrete guide to a powerful causal technique.#SyntheticControl #CausalInference #DataScience #MachineLearning #Experimentation #RideHailing #PolicyEvaluation #ABTesting #DifferenceInDifferences #PlaceboTest #Counterfactual #SurgePricing #Austin #DonorPool #CausalImpact #Technology #FexingoBusiness #BusinessPodcastKeep every episode free: buymeacoffee.com/fexingo
-
In this episode, Lucas and Luna dive into conformal prediction, a model-agnostic framework that gives machine learning models reliable uncertainty estimates without sacrificing coverage guarantees. They discuss how it works — using a calibration set to produce prediction sets with a user-specified confidence level — and walk through a concrete example from medical imaging where a model flags skin lesions. They contrast it with Bayesian methods and softmax probabilities, and explore why it's gaining traction in regulated industries like healthcare and finance. No prior knowledge of conformal prediction required; just a curious mind about making AI more trustworthy. If today's tech conversation gave you something usable, consider supporting the show at buy me a coffee dot com slash fexingo — keeping it free from ads so we can focus on substance.#ConformalPrediction #UncertaintyQuantification #MachineLearning #DataScience #AI #TrustworthyAI #HealthcareAI #PredictiveModeling #HypothesisTesting #ModelInterpretability #Technology #Podcast #FexingoBusiness #BusinessPodcast #DataDriven #MLOps #AIEthics #CalibrationKeep every episode free: buymeacoffee.com/fexingo
-
In this episode, Lucas and Luna explore how knowledge distillation allows data scientists to compress large neural networks into smaller, faster models without catastrophic accuracy loss. They break down the teacher-student training paradigm, using real examples from Google's DistilBERT — which shrank BERT by 40% while retaining 97% of its language understanding — and NVIDIA's work compressing vision models for autonomous vehicles. Lucas explains the role of temperature scaling in softening probabilities, and Luna questions when distillation outperforms pruning or quantization. They also discuss practical trade-offs: when a distilled model is good enough for production versus when you need the full ensemble. This episode gives you one concrete technique to reduce inference cost and latency in your own ML pipeline.#KnowledgeDistillation #ModelCompression #TeacherStudent #DistilBERT #NVIDIA #BERT #DeepLearning #InferenceOptimization #MachineLearning #DataScience #Technology #FexingoBusiness #BusinessPodcast #NeuralNetworks #EdgeAI #Pruning #Quantization #TemperatureScalingKeep every episode free: buymeacoffee.com/fexingo
-
Episode 76 of The Data Science Podcast dives into causal forests, a powerful tree-based method for estimating heterogeneous treatment effects. Lucas and Luna unpack how this technique helps data scientists answer not just 'does a treatment work?' but 'who benefits most?' using real-world examples from personalized medicine and targeted marketing. They walk through the intuition behind honest splitting, the role of causal trees, and why this approach outperforms traditional subgroup analysis. Tune in for a concrete breakdown of how causal forests are changing decision-making in health tech and beyond, with a look at how researchers are now combining them with deep learning for even richer insights.#CausalForest #HeterogeneousTreatmentEffects #CausalInference #MachineLearning #DataScience #PersonalizedMedicine #TargetedMarketing #HonestSplitting #CausalTree #ATHE #ConditionalAverageTreatmentEffect #RandomForest #HealthTech #TreatmentEffectHeterogeneity #DataSciencePodcast #FexingoBusiness #BusinessPodcast #TechnologyKeep every episode free: buymeacoffee.com/fexingo
-
Episode 75 of The Data Science Podcast dives into Temporal Fusion Transformers (TFT), a deep learning architecture that's changing how data scientists handle multi-horizon time series forecasting. Lucas and Luna break down how TFT combines interpretable components like variable selection networks with attention mechanisms to produce accurate, explainable forecasts. They walk through a real-world case: a mid-sized retailer using TFT to predict daily store-level demand across 500 stock-keeping units, handling seasonality, promotions, and exogenous variables like weather. The hosts explain why TFT outperforms traditional ARIMA and gradient boosting on datasets with multiple time series and static covariates, and they discuss the trade-offs in training complexity. TFT is especially powerful when you need both high accuracy and regulatory interpretability — think supply chain planning or energy load forecasting. Lucas and Luna contrast it with simpler models and highlight open-source implementations from PyTorch Forecasting and Google's TensorFlow Probability. The episode also touches on when not to use TFT: small datasets or when interpretability isn't a priority. By the end, listeners understand the architecture's key components and when to reach for TFT in their own projects.#TemporalFusionTransformer #TimeSeriesForecasting #DeepLearning #InterpretableML #DataScience #Forecasting #AttentionMechanism #VariableSelection #PyTorchForecasting #TensorFlowProbability #SupplyChain #RetailAnalytics #MultiHorizon #QuantileRegression #ExplainableAI #Technology #FexingoBusiness #BusinessPodcastKeep every episode free: buymeacoffee.com/fexingo
-
Lucas kicks off Episode 74 of The Data Science Podcast with a specific problem: a model is retrained every night, but each team rebuilds the same features from scratch, wasting compute and introducing inconsistency. He introduces feature stores — centralized repositories for defining, sharing, and serving features — as the solution. Luna asks how feature stores handle time-travel for point-in-time joins, and Lucas walks through the example of Uber's Michelangelo and Feast, an open-source feature store. They discuss how a feature store reduces training-serving skew, enforces governance with data lineage, and enables online serving with low latency. Lucas shares hard numbers: at a mid-size fintech, a feature store cut feature engineering time by 60 percent and reduced model deployment errors by 40 percent. They also touch on the tension between data science autonomy and centralized governance. The episode closes with the 'buy me a coffee' call — a simple, sincere ask for listener support.#DataScience #MachineLearning #FeatureStore #MLOps #Feast #UberMichelangelo #FeatureEngineering #TrainingServingSkew #PointInTimeJoin #DataGovernance #OnlineServing #FeatureReuse #DataLineage #Technology #TechPodcast #FexingoBusiness #BusinessPodcast #DataDrivenKeep every episode free: buymeacoffee.com/fexingo
- Laat meer zien
