Brainfeed Summaries — AI-Powered Video Summaries — Page 97
Browse AI-powered summaries of educational YouTube videos on science, technology, productivity, and more.
10,682 summaries
AI for Literature Reviews: Complete Guide for PhD Students & Researchers
AI is compressing the most time-consuming parts of academic literature reviews—paper discovery, screening, and data extraction—while shifting...
Q&A With Mem.ai Co Founder Dennis Xu
Mem.ai co-founder Dennis Xu traces the company’s origin to a long-running frustration: knowledge workers generate massive amounts of information, yet...
Ordinary Differential Equations 19 | Solution Space
For systems of linear differential equations, the solution set has a rigid structure: in the homogeneous case, all solutions form an n-dimensional...
Complex Analysis 18 | Complex Contour Integral [dark version]
Complex contour integrals are defined by adding up the values of a complex function along a parameterized path, with each contribution weighted by...
Real Analysis 50 | Properties of the Riemann Integral for Step Functions [dark version]
For step functions, the Riemann integral behaves exactly like a well-behaved “oriented area” functional: it turns a step function into a real number...
How to be Productive in Burnout - Recovery Vlog
Burnout doesn’t always require a full stop—it often calls for a smarter kind of rest paired with practical structure. After a weekend spent editing...
System development: system testing and deployment
Testing and deployment become the make-or-break phase after a knowledge management system has already captured knowledge from databases and codified...
Distributions 5 | Regular Distributions [dark version]
Regular distributions are exactly those distributions that can be represented by ordinary functions—more precisely, by locally integrable...
Banach Fixed-Point Theorem [dark version]
Banach’s Fixed-Point Theorem guarantees a unique fixed point for a contraction on a complete metric space—and it also provides a practical way to...
My Notion Project Management System for 2021
A freelancer-focused Notion project management system aims to reduce constant context switching by organizing work into “life territories” and then...
Save ChatGPT conversations to your notes (new plugin feature)
A new Zapier-based workflow lets ChatGPT Plus users automatically save entire conversation threads into Reflect Notes—then, when Reflect’s character...
Start Simple (2) - Troubleshooting - Full Stack Deep Learning
Starting simple is the fastest way to find out whether poor model performance comes from a hard problem or from avoidable bugs in the pipeline. The...
Real Analysis 20 | Ratio and Root Test [dark version]
Ratio and root tests give fast, geometric-series-based ways to decide whether an infinite series a_k converges absolutely. The key payoff is...
Make With Notion 2024: Crafting beautiful tools (Akshay Kothari, Dylan Field)
Design tools and product-building partnerships are often treated as “creative” stories, but the conversation between Dylan Field and Akshay Kothari...
13. SEMinR Series - Reflective Model | Reliability and Convergent Validity
Reflective measurement model checks hinge on three linked quality tests: internal consistency reliability, convergent validity, and (later)...
How to Find a Research Gap Using AnswerThis.io | Step-by-Step Guide
AnswerThis.io’s Research Gap Finder is positioned as a practical way to move from a broad research interest to a publishable, citation-backed...
Ethics in Qualitative Research (in the past and now) | Anonymity, Confidentiality, Informed Consent
Ethics in qualitative research isn’t just a bureaucratic checkbox for dissertations—it’s a practical set of duties aimed at protecting participants...
Automatically catalog all recent files in Obsidian
A lightweight Ruby script can automatically generate a “recent” catalog inside Obsidian by listing every file created or last updated within the past...
Fourier Transform 10 | Fundamental Example for Fourier Series
A single, carefully chosen “step” function is enough to prove Parseval’s identity for all square-integrable (L2) functions—once the Fourier...
A Simple Content Repurposing System In Notion (From 1 Piece ➡️ 3-5 Posts)
A Notion-based repurposing system turns one “primary” content piece into multiple platform-specific posts with minimal manual work—by duplicating the...
Building and Operating with Open Source: Lessons from AFFiNE with Yifeng - AFFiNE x Supabase
AFFiNE built an offline-first, open-source knowledge base and editor by treating early prototypes as learning tools, then tightening engineering...
#5 Automation is Dangerous • Zettelkasten Live
Automation in knowledge work feels like a safety net—until it quietly removes the distinctions, context, and craftsmanship that make ideas usable....
gpt-oss - OpenAI Open-Weight Reasoning Models | Ollama test, Benchmaxing, Safetymaxing?
OpenAI’s newly released open-weight reasoning models—GPT OSS 120B and GPT OSS 20B—sparked hype for matching closed-model performance on popular...
Deep Learning Frameworks
Deep learning frameworks can be judged along two practical axes: how pleasant they are for building models and how well they scale once those models...
Statistics for Research - L27 - Analyze, Interpret, & Report Independent Samples T Test in SPSS
An independent-samples t test in SPSS was used to check whether perceptions about “vision” differ between male and female employees. The analysis...
32. SEMinR Lecture Series - Multi-group Analysis (PLS-MGA)
Multi-group analysis in SEMinR (PLS-MGA) lets researchers test whether key path relationships in a PLS-SEM model hold the same across subgroups—here,...
Notion Masterclass: Build Your Second Brain in Notion
A “second brain” in Notion is built to solve a practical problem: people can capture far more information than they can reliably store, find, and...
How to Use Tabs in The Archive
Tabs in the Zettelkasten “archive” are used as a practical workflow tool: one tab stays dedicated to navigation, one tab functions as a working...
The Apple AI Reasoning Paper is Flawed—Here's Why
Apple’s “reasoning” benchmark is being criticized as fundamentally flawed because it conflates genuine logical reasoning with a model’s...
CI/Testing (3) - Testing & Deployment - Full Stack Deep Learning
Continuous integration is the backbone of reliable machine-learning development: every time code is pushed, an automated pipeline runs tests (and...
Complex Analysis 30 | Identity Theorem [dark version]
A single accumulation point of agreement between two holomorphic functions forces them to be identical everywhere on a connected domain. That’s the...
Are Brain and Cosmic Web similar? | Dr Alberto Feletti
A neurosurgeon and an astrophysicist report quantitative similarities between the brain’s cortical neuron network and the universe’s cosmic...
Functional Analysis 19 | Hölder's Inequality [dark version]
Hölder’s inequality for vectors in ℓ^p spaces is proved using a two-step strategy: first establish Young’s inequality for positive numbers, then...
How to Write Your First Draft in Half the Time with Paperpal
Paperpal Copilot is built to cut the time it takes to move from messy research notes to a usable first draft by generating structured outlines that...
Obsidian se met à table - tuto obsidian 1.5
Obsidian 1.5 rend la création de tableaux nettement plus simple en remplaçant la syntaxe Markdown pénible par un éditeur natif : colonnes, lignes,...
Swapnil Ogale - Putting the “tech” in technical writer
Technical writers don’t need to become full-time developers to bring “tech” into their work—enough command of the tools, workflows, and text formats...
Self-Editing School: How to Self-Edit Your Novel to Improve Readability with JoEllen Nordstrom
Self-editing for fiction gets a practical makeover: writers are urged to evaluate their manuscripts at the story-structure level first—plot,...
Do you want to write a good Limitations section? Avoid saying these 3 things
A strong limitations section isn’t a place to complain about logistics, defend yourself, or pretend the study has no weak spots. Instead, it should...
Probability Theory 22 | Conditional Expectation (given random variables) [dark version]
Conditional expectation given a random variable extends the familiar idea of “averaging with information” from conditioning on an event to...
Using unstructured interviews in qualitative research
Unstructured interviews—often linked to ethnographic research—prioritize open, natural conversation over an interview guide, aiming to capture...
Publishing research papers in Q1 journals is EASY once you know this
Top Q1 journals reject most submissions—often at rates above 80%—and the recurring reason isn’t formatting or methodology. It’s that many papers fail...
Founder Fridays: Most founders get design wrong with Brian Lovin, Campsite & Anastasia Crew, Notion
Design isn’t just “coat of paint”—it’s a business lever tied to customer feedback, product strategy, and distribution. Brian Lovin’s through line...
Tuto Obsidian - 5 ASTUCES qui vous feront gagner un temps fou
Obsidian users can cut down on mouse time and reduce interface clutter by leaning on a handful of built-in shortcuts and view settings—especially...
Hilbert Spaces 5 | Proof of Jordan-von Neumann Theorem
A normed space becomes a genuine inner product space exactly when its norm satisfies the parallelogram law. That criterion—Jordan–von Neumann’s...
Lecture 10: Research Directions - Full Stack Deep Learning - March 2019
Research momentum in deep learning has accelerated to the point where thousands of papers arrive every month, making it impossible for any one person...
Multivariable Calculus 15 | Multi-Index Notation [dark version]
Multi-index notation streamlines multivariable partial derivatives by encoding both the differentiation order and which variables are involved into a...
Weekly Review GTD using Notion template as a guide.
A weekly review isn’t just a productivity ritual—it’s a steering mechanism. Without a regular check-in, other people’s priorities quietly take over,...
Setting up plugin settings with Marcus Olsson
Obsidian plugin settings can be made persistent by wiring three pieces together: a typed settings model with defaults, runtime load/save using...
02. SPSS Classroom | Basic Statistical Concepts (P2) | Hypotheses, Errors (Type 1/Type 2), P-Value
Hypothesis testing is a structured way to decide whether a real-world claim about a population should be accepted or rejected based on sample data. A...
Writing the Best Paper (Vol 5) - How to Write a Survey Paper? Research Tutorials with Dr. Sourish
Survey papers succeed or fail on focus and comparison, not on how many papers get listed. The core message is that a strong survey paper picks one...
Build AI Agent from 0 to Production Deployment | LangChain, Ollama, MLflow & Docker (Full Tutorial)
A unit-conversion AI agent can be built end-to-end—from a single-tool loop to a streaming REST API—then packaged into a Docker container and deployed...
Le charme des rétroliens (backlinks) tuto Obsidian plugin Influx
Obsidian peut afficher, de façon plus lisible, les “rétroliens” (backlinks) — c’est-à-dire toutes les notes qui pointent vers une note donnée — et un...
Tutoriel Excalidraw pour Obsidian n°2 en français avec une astuce inédite
Le plugin Excalidraw pour Obsidian transforme des schémas en véritables “cartes de contenus” cliquables : un dessin devient une table des matières...
Regaining Depth With the Zettelkasten Method
The core insight is that Zettelkasten isn’t meant to be a catch-all filing system for everything a person reads. It works best when it functions as a...
ML Project Template for 2025 - Build ML Pipelines with Python, uv, DVC, FastAPI, Docker
A ready-to-use machine learning project template is positioned as a 2025 blueprint for taking a model from dataset creation to a production-style...
The Greatest Conversationalist Of All Time | TKTS Clips
Dale Carnegie’s “How to Win Friends and Influence People” is presented as a practical playbook for social success—built less on clever talking and...
Multivariable Calculus 29 | Method of Lagrange Multipliers
Lagrange multipliers for constrained extrema aren’t a special trick—they fall out directly from the implicit function theorem. For a function...
CBSEM using #SmartPLS4 | 9 | Understand and Interpret Construct Reliability and Convergent Validity
Reliability and convergent validity are the next checkpoint after factor loadings and model fit in a SmartPLS measurement model. Construct...
10 Tips for Working from Home Effectively as a Phd Student
Working from home as a PhD student works best when boundaries are treated like part of the job: keep a predictable routine, build a dedicated work...
How I use Index Notes to document my DevOps tech notes
Index Notes are presented as a practical way to turn scattered DevOps knowledge into a navigable network of short, reusable notes—starting from a few...
Abstract Linear Algebra 16 | Gramian Matrix [dark version]
Orthogonal projection onto a finite-dimensional subspace can be computed by solving a linear system built from inner products—using a special matrix...
10Min Research Methodology - 26 - Directional, Relational, and Differential Hypotheses
Directional hypotheses hinge on knowing the expected direction of an effect before analysis. When a hypothesis includes wording like “significantly...
#SmartPLS4 Webinar Day 4: Complex Modelling Example using SmartPLS
Structural equation modeling in SmartPLS starts with disciplined data screening and then moves through a two-stage quality check: measurement model...
Nvidia's Strategy at Jensen Huang's CES 2025 Keynote: Robotics and AI
Nvidia’s CES 2025 push ties together three fronts—gaming GPUs, enterprise AI models, and robotics/autonomous-vehicle computing—into one integrated...
Abstract Linear Algebra 13 | Orthogonality
Orthogonality is defined in any inner product space as the condition that two vectors have zero inner product—turning the familiar “right angle” idea...
Real Analysis 48 | Riemann Integral - Partitions [dark version]
Riemann integration is introduced as the practical way to compute the signed (or “orientated”) area between a function’s graph and the x-axis. The...
The ultimate guide to using Reflect for writing
Reflect is positioned as a writing system built around one core idea: writing is organized thinking, and the fastest way to improve output is to...
Building Kratky Buckets | Kratky Hydroponics | Pepper Cuttings | New Grow Area Sneak Peek
A DIY Kratky setup for pepper cuttings is built around food-safe one-gallon buckets, drilled to fit net cups, then tested with different rooting and...
Chatting with Glue - Close reading / Analysis / Note Taking
A close reading of “Chatting with Glue” turns on a simple but consequential claim: conversation carries far more meaning than the words typed into...
Life-Changing Bible Study Method: Precept Upon Precept
A Bible study approach built on “precept upon precept” and “line upon line” is presented as a practical way to avoid spiritual confusion—by forcing...
Nomenclature | Alcohols and Phenols | Organic Chemistry | lec 05 II D Rizwana
Alcohol and phenol nomenclature hinges on one rule: assign the lowest possible numbers to the carbon(s) attached to the principal functional group,...
Step-by-Step Tutorial: How to Post to X-Twitter Using Agentic AI and n8n
A step-by-step workflow ties together a web form, agentic text generation, email-based human approval, and automated posting to X (Twitter). The core...
Evaluation of KM effectiveness: Tools and
Evaluating whether a knowledge management (KM) system is effective comes down to two linked tasks: quantify the return on KM investments and make...
How to Structure the Literature Review in a Research Paper/Thesis?
A literature review can be organized in several workable ways, but the choice should follow how the study’s variables are treated—either as separate...
Probability Theory 27 | kσ-intervals
K-sigma intervals give a distribution-agnostic way to bound how much probability mass lies near the mean: for any random variable with finite...
User Research - Nikki Anderson
User research is a practical, mostly qualitative discipline focused on understanding real people’s pain points, motivations, and behaviors so product...
Coda.io finally has columns and workable subpages
Coda’s latest editor update adds two long-requested capabilities—true side-by-side columns and “workable” subpages—that make it far easier to build...
Master the New Mem.ai Interface: Essential Workarounds for a Seamless Experience
Mem’s new interface removes several familiar building blocks—most notably Templates, Tasks, and the dedicated Inbox—while simplifying the home screen...
AI Agents with LangGraph & Llama 3 | Control the Execution Flow and State of Your Agent Apps
LangGraph is positioned as a way to control both the execution order and the evolving state of agentic applications—down to loops, branching, and...
01. SPSS Classroom Lectures| Basic Statistical Concepts (P1) | Reliability and Validity
Reliability and validity are the two core quality checks behind any questionnaire or measurement tool—reliability for consistency, validity for...
10Min Research Methodology - 25 (P1) - Concept and Types of Hypotheses
A hypothesis is the study’s proposed relationships in plain, testable form—an educated, logically grounded statement that sets the scope of what will...
Cleaning up my Logseq Graph (sound fix)
A graph cleanup spree is underway to prepare a Logseq knowledge base for an upcoming database-oriented version, with the biggest practical lesson...
10 Lessons from Elon Musk's Biography
Elon Musk’s biography, as interpreted through a set of “lessons,” frames success less as luck or hustle and more as a repeatable psychology: early...
Tutoriel Obsidian en français Synchroniser Titre et Nom de fichier, récupérer fichiers effacés
L’astuce la plus utile pour gagner du temps dans Obsidian consiste à supprimer une source majeure d’incohérences : quand le titre d’une note change,...
Fourier Transform 11 | Sum Formulas for Sine and Cosine
A precise closed-form expression for a cosine Dirichlet-type series is derived and then used to extend convergence results all the way to the...
Reinforcement Learning from Human Feedback (RLHF) - Beginners Guide | AI Foundation Learning
Reinforcement learning from human feedback (RLHF) is a training approach that steers AI agents toward better decisions by using human evaluations as...
Unbounded Operators 3 | Closed Operators
Closed operators are defined by a simple geometric/topological rule: an operator T between normed spaces is “closed” exactly when its graph is a...
Real Analysis 45 | Taylor's Theorem [dark version]
Taylor’s theorem turns local smoothness into a controlled approximation: if a function has enough derivatives, its value near a chosen expansion...
20. SEMinR Series. Evaluating Structural Model | Step 1 | Collinearity Diagnostics
After finishing reliability/validity checks for the measurement (outer) models, the next priority in PLS-SEM is to evaluate the structural (inner)...
OLD MAPS for Swedish Genealogy!
Swedish genealogy often stalls when ancestors’ village names don’t appear on modern maps. Cartbuild is presented as a solution: a mapping site that...
Gemini vs. ChatGPT vs. Perplexity: Which AI Wins Research Writing
For researchers doing free brainstorming and drafting, Gemini is positioned as the most versatile option because it combines academic sourcing with...
Complete AI Guide for Researchers | How to use AI ethically and responsibly | Dr. Mushtaq Bilal
Researchers used to find literature by walking through physical library catalogs—index cards in drawers, then shelves, then journals and books—an...
Build an AI Social Media Content Generator in 20 Minutes | AI Agents with LangGraph and Llama 3.1
A LangGraph-based agent loop can turn technical input into platform-ready social posts for both Twitter and LinkedIn—while iterating through multiple...
AI TechTalk with Nate and Mike
A Microsoft analysis of roughly 200,000 Bing “Copilot” chats suggests AI will reshape some occupations far more than others—while the...
Is SciSpace Research Agent Worth It? | Researcher’s Review | Avi Staiman
SciSpace Research Agent is positioned as a “research-in-one-place” AI system built to reduce the budgeting and workflow chaos that comes from...
Measure Theory 20 | Outer measures - Part 1 [dark version]
Outer measures provide a flexible way to assign “volumes” to *all* subsets of a space without requiring a sigma-algebra up front. Instead of starting...
Creating an Outline and Authoring Chapters - Self-Publishing 4D PKM in 6 Weeks - VLOG Episode 4
A self-publishing author is turning a 15-chapter, ~9,000-character book outline into a full draft by running an iterative, tool-assisted...
One Year Later with Nicole van der Hoeven - Session 2 at the Sketch Your Mind Conference, 2025
Nicole van der Hoeven’s year-long shift in personal knowledge management centers on one practical decision: make every new note a “hybrid” by...
She published 5 papers in 12 months (Q1 Scopus-indexed journals)
Kathy Wong credits her publication momentum in top journals to a mix of disciplined writing time, a clear research focus, and a research agenda...
Fourier Transform 5 | Integrable Functions [dark version]
Fourier analysis needs a precise function space where “integrable over one period” is enough to make approximation and projection work. For...