## 1. Project Overview & Quickstart (heilcheng/README) # README Open-source repository heilcheng/README ### Repository Details - **Repository:** [heilcheng/README](https://github.com/heilcheng/README) - **Primary Language:** Code *Note: High-volume repository documentation is actively indexed and synchronized by YakaAI.* ## 2. Official Technical Reference & Guides (heilcheng/heilcheng.github.io) ## File: README.md # Portfolio Interactive portfolio built with Next.js 14. Live at [haileycheng.com](https://haileycheng.com). ## Technical Features ### Obsidian-style Knowledge Graph A force-directed graph visualization powered by **D3.js** that continuously links content nodes: - **Dynamic Linking**: Automatically connects blog posts and portfolio sections (Home, Blog, Showcase) into an interactive network. - **Interactive Physics**: Features custom force simulation with collision detection, drag capabilities, and zoomable navigation. ### Data Visualizations - **GitHub Contributions**: Integrated visualization of coding activity and streaks. - **Interactive Maps**: - **World Map**: Visualization of visited countries using `react-simple-maps` and TopoJSON. - **Local Map**: Detailed Hong Kong map built with `React Leaflet` for highlighting specific locations. ## Tech Stack - **Core**: Next.js 14 (App Router), TypeScript, React 18 - **Styling**: Tailwind CSS, shadcn/ui, Framer Motion - **3D & Graphics**: Three.js, React Three Fiber, D3.js - **Content**: MDX, gray-matter ## Development ```bash pnpm install # Install dependencies pnpm dev # Start dev server pnpm build # Build for production ``` ## Credits Original template designed by [Dillion Verma](https://github.com/dillionverma/portfolio). ## License MIT License. --- ## File: content/biohacking.mdx --- title: "biohacking" publishedAt: "2025-12-23" summary: "biohacking is about aligning with biology, not forcing extremes" tags: ["Health", "Biohacking", "Longevity"] --- biohacking is about aligning with biology, not forcing extremes it is mostly about removing friction, not adding hacks consistency beats novelty every time ### core principles - fix sleep, light, food, movement, stress before supplements - measure only what you can act on - avoid injections, experimental drugs, or extreme interventions - favor habits with long human safety records - stop anything that worsens sleep, anxiety, or recovery ### sleep (highest roi) - sleep is the foundation everything stacks on - fixed wake-up time > fixed bedtime - morning sunlight within 30–60 minutes of waking - no bright or overhead light 2–3 hours before bed - cool, dark, quiet bedroom - caffeine cutoff 8–10 hours before sleep - alcohol framed as a sleep disruptor, not relaxation #### circadian rhythm - light is the primary biological clock - outdoor daylight beats light boxes when possible - dim evenings support melatonin release - late-night screens = artificial jet lag - consistent meal timing reinforces circadian alignment ### nutrition - fewer rules, more signal - whole foods over supplements - protein sufficiency for muscle, satiety, glucose stability - fiber for gut and metabolic health - minimize ultra-processed foods rather than chasing superfoods - time-restricted eating used cautiously, not dogmatically - hydration guided by thirst + urine color #### glucose awareness (without obsession) - glucose spikes are context-dependent, not moral failures - walking after meals improves glucose handling - pairing carbs with protein/fat blunts spikes - avoid anxiety-driven continuous tracking ### exercise (the real backbone) #### movement baseline - daily movement is non-negotiable - steps and light activity matter even if you train - long sitting blocks blunt metabolic health #### resistance training / lifting - primary goal: preserve and build muscle mass - muscle = metabolic health, insulin sensitivity, longevity - 2–4 sessions per week is sufficient - compound movements prioritized (squat, hinge, push, pull, carry) - progressive overload > novelty - form and consistency beat ego lifting #### cardio - cardio is for heart, mitochondria, and brain - not all cardio is the same ##### zone 2 cardio - low to moderate intensity, conversational pace - improves mitochondrial density and fat oxidation - 2–4 hours per week total - examples: brisk walking, cycling, easy jogging, rowing ##### high-intensity cardio - short, hard efforts raise cardiovascular ceiling - improves vo2 max - 1–2 sessions per week max - excessive hiit = stress accumulation #### vo2 max - one of the strongest predictors of lifespan and healthspan - reflects heart, lung, blood, and muscle integration - improves via intervals, hills, mixed endurance + strength - progress stalls without sleep and recovery ### recovery - adaptation happens during rest, not training - sleep, calories, and protein enable gains - soreness is not a success metric #### stress & nervous system - chronic stress treated as a root cause - slow nasal breathing > complex breath protocols - regular time without digital input - social safety and trust affect biology #### cold & heat exposure - cold exposure as mild hormetic stress, not fat-loss magic - short cold showers over extreme ice rituals - sauna for relaxation, cardiovascular support, sleep quality - recovery prioritized over suffering ### fat loss (honest framing) - fat loss requires a sustained energy deficit - exercise supports fat loss, diet adherence matters more - muscle preservation is the priority while cutting ### extended fasting (strategic use only) - extended fasting can reduce fat mass and improve insulin sensitivity - higher risk, higher reward tool - not required for most people #### who it may suit - metabolically unhealthy individuals - people with significant fat to lose - those with prior fasting experience #### who should avoid - underweight individuals - eating disorder history - high training volume athletes - poor sleep or high stress baselines #### protocol basics - typically 36–72 hours, not weeks - water intake is mandatory - activity volume reduced significantly - heavy lifting paused #### supplements & electrolytes during extended fasting - sodium: prevents dizziness and low blood pressure - potassium: supports nerve and muscle function - magnesium: reduces cramps, supports sleep and stress - electrolytes must be sugar-free #### optional - black coffee or plain tea (cautiously) - bone broth (technically breaks fast but improves safety) #### rules - do not stack extended fasting with intense training - fasting days: walking or light zone 2 only - fed days: lift heavy, train hard ### supplements (minimalist, focused list) #### core vitamins - vitamin d: immune, mood, bone health - vitamin b12: nerve function, energy metabolism - folate (b9): cell division, neurological health - vitamin c: antioxidant, collagen synthesis - vitamin a (food preferred): vision, immune health - vitamin e: antioxidant support - vitamin k2: calcium regulation, bone and vascular health #### minerals - magnesium (glycinate or threonate): sleep, stress, muscle relaxation - zinc: immune and hormone function - iron: oxygen transport (supplement only if deficient) - iodine: thyroid support - selenium: thyroid enzymes, antioxidant systems - potassium: electrolyte balance (prefer food sources) #### fatty acids - omega-3s (epa/dha): cardiovascular, brain, inflammation balance #### protein & amino acids - adequate dietary protein first - protein powders for convenience only - creatine monohydrate: strength, cognition, aging support - glycine: sleep quality, connective tissue support #### gut support - fiber from food first - probiotics short-term, strain-specific - prebiotics to support existing microbiome #### rules - food first, supplements last - test when possible, guess less - avoid stacking dozens of compounds ### mental performance - attention is a finite resource - single-tasking beats productivity hacks - deep work protected by environment design - digital minimalism as cognitive hygiene #### environment - reduce constant noise and notification load - clean air and ventilation matter more than gadgets - daylight exposure at workspaces - ergonomic basics over expensive setups ### tracking & wearables - tools for pattern recognition, not self-surveillance - trends > daily fluctuations - sleep regularity > sleep scores - stop tracking if it increases anxiety ### what fades - extreme fasting as a lifestyle - biohacking as identity or flex - optimization without trade-off awareness - novelty chasing ### what wins - boring routines done daily - recovery as performance - muscle + heart + mitochondria as priorities - sustainability over intensity ### bottom line the best biohack is not adding more it is removing friction, noise, and self-inflicted stress lift weights, protect sleep, move daily, recover hard consistency beats sophistication every time --- ## File: content/durov.mdx --- title: "durov" publishedAt: "2025-12-23" summary: "distilled philosophy on freedom, privacy, and discipline from pavel durov" tags: ["freedom", "privacy", "discipline", "minimalism"] --- ## 1. core philosophy: freedom first - freedom over comfort - freedom of action matters more than convenience, popularity, or approval - independence is structural - real freedom comes from removing dependencies, not negotiating with them - principles > short-term wins - compromise compounds; once crossed, lines cannot be redrawn - exit optionality matters - the ability to walk away preserves autonomy ## 2. money, success, and fame - money is a tool, not a goal - wealth attracts pressure from states, investors, and public opinion - no ads, no shareholders - every external stakeholder becomes a potential lever of control - skeptical of fame - attention distorts incentives and decision-making - optionality > valuation - maximal scale can trap founders more than it frees them ## 3. work, creativity, and building - small teams outperform large ones - coordination cost grows faster than productivity - automation over headcount - more people often create internal friction, not better products - deep, uninterrupted work - originality requires silence and long focus windows - products over narratives - real utility spreads without persuasion or hype ## 4. privacy, encryption, and trust - privacy is a human right - not a feature toggle or marketing claim - no backdoors, ever - any “lawful access” becomes a universal vulnerability - security must be technical - promises are meaningless without architectural guarantees - integrity over market access - better to exit a country than weaken user protections ## 5. censorship, states, and power - states default to control - surveillance expands under the language of safety and order - democracies are not immune - censorship now arrives via ids, age checks, and content scanning - political neutrality is non-negotiable - once a platform chooses sides, trust collapses - the free internet is fragile - openness erodes quietly, step by step ## 6. apple, google, and platform control - app stores are chokepoints - os owners can silence apps indirectly - platform dependence is a kill switch - removal or throttling equals functional censorship - closed ecosystems prioritize control - convenience is exchanged for user autonomy - freedom requires alternatives - web access, decentralization, and redundancy matter ## 7. health, discipline, and lifestyle - total abstinence from alcohol, tobacco, coffee, drugs - clarity and long-term productivity over stimulation - avoid pills unless necessary - pharmaceuticals often mask root causes like sleep or stress - simple, clean diet - no fast food, minimal sugar; mostly seafood and vegetables - intermittent fasting - discipline, mental sharpness, metabolic stability - cold exposure (banya, ice baths) - deliberate discomfort to train stress resilience - regular intense physical activity - clearer thinking, lower anxiety - discipline equals freedom - fewer cravings mean fewer control points ## 8. personal life design - high geographic mobility - reduces coercion by any single state - minimalism - fewer possessions, fewer anchors - extreme personal privacy - beliefs must align with behavior - avoid passive algorithmic feeds - recommender systems manipulate attention and emotion ## 9. unifying logic - dependency → leverage → control - discipline → independence → freedom - centralization → censorship → loss of trust --- ## File: content/eataly.mdx --- title: "eataly" publishedAt: "2025-12-23" summary: "a guide to authentic italian food knowledge and fun facts" tags: ["food", "italy", "culture"] --- ## the golden rules - no pineapple on pizza - it is considered a culinary crime - no chicken on pasta - keep the protein separate or use cured meats - no cappuccino after 11am - milk is for breakfast, espresso is for digestion - italian cuisine is unesco heritage - focusing on simplicity and seasonal ingredients ## the carbonara manifesto - use guanciale (pig cheek) instead of pancetta for the proper fat content and funk - pecorino romano is the traditional cheese of choice for roman pasta - no cream allowed - the sauce is an emulsion of egg yolks, cheese, and pasta water - pasta water is liquid gold - use it to bind the sauce to the noodles ## pasta shapes and logic - shape determines the sauce - never choose a shape at random - bucatini: thick with a hole in the middle - perfect for capturing oils and nutty sauces - orecchiette: "little ears" - designed to scoop up small vegetable bits like cima di rapa - rigatoni: the ridges (rigate) - meant to catch thick, chunky meat sauces - fresh vs dried - fresh pasta is for silkiness; dried pasta is for the perfect al dente bite ## the art of dining - traditional structure: antipasto, primo, secondo, contorno - fare la scarpetta - use a small piece of bread to wipe the remaining sauce off your plate - water and wine only - soda is rarely seen on a traditional dinner table - digestivo - end with a shot of espresso or a bitter liqueur to help with digestion ## pizza knowledge - margherita: representing the flag - basil (green), mozzarella (white), and tomato (red) - marinara: the oldest and simplest style - just tomato, garlic, and oregano (no cheese!) - cornicione: the puffy outer rim - should have "leopard spots" from high-heat wood firing - dough is king - the quality of the crust is more important than the number of toppings ## shopping and sourcing - visit mercato gourmet (wan chai/hk) for authentic imports and high-quality cheeses - buy parmigiano reggiano in chunks - to preserve the crystalline texture - look for nduja (spicy spreadable pork) - to add a kick to pasta or pizza - pane toscano: traditionally saltless bread - made specifically to balance salty sauces --- ## File: content/my-self-built-mechanical-keyboard.mdx --- title: "my self-built mechanical keyboard" publishedAt: "2025-12-23" summary: "technical specifications and build log of a custom 50% mechanical keyboard" tags: ["mechanical keyboard", "hardware", "diy", "qmk"] --- ## specs - model: omega50 rev.b - layout: 50% (5×12, 58 keys) - case: 3d-printed, white - pcb: hot-swap (usb + bluetooth) - firmware: qmk ## components - alpha keys: gateron white (linear, ~35 g) - stabilized keys: ttc silent moon white (linear, silent, ~42 g) - acoustics: poron internal foam + silencing rings - keycaps: pbt blank (no legends), oil-resistant ## build process - install pcb stabilizers & flash qmk firmware - place poron dampening foam between pcb and case - mount pcb into 3d-printed case - insert switches & install silencing rings - install blank pbt keycaps - configure layers and navigation in qmk - tune debounce settings for light actuation ## notes - light linear switches require stable pcb mounting - poron foam reduces mid-frequency resonance - mixed switch weights improve control on large keys --- ## File: content/reasons-to-do-math.mdx --- title: "reasons to do math" publishedAt: "2025-12-23" summary: "why mathematical maturity remains the ultimate leverage in a tech-driven world" tags: ["math", "education", "ai", "thinking"] --- ## 1. math is the substrate of modern technology - ai, machine learning, cryptography, graphics, optimization, and quantitative finance all reduce to math - models change fast; linear algebra, probability, optimization, and analysis do not - tools expire, fundamentals compound ## 2. ai increased the value of math, not reduced it - ai automates execution, not problem formulation - the bottleneck in 2025 is knowing what to model, approximate, relax, or prove - math majors are trained to reason under abstraction and uncertainty - the exact gap ai hasn’t closed ## 3. math trains transferable thinking, not narrow skills - proof-writing → rigorous reasoning - modeling → translating reality into structure - asymptotics → understanding limits and tradeoffs - error bounds → knowing when results are trustworthy - these skills transfer across domains better than tool-specific training ## 4. math is future-proof against tech churn - programming languages, frameworks, and stacks turn over every 3–5 years - mathematical foundations last decades - employers increasingly look for people who can relearn fast, not people locked into one stack ## 5. math majors adapt across industries - math graduates end up in diverse fields: - ai / ml research - quantitative finance / trading - cryptography & security - data science - computational biology / medicine - economics & policy modeling - graduate research (math, cs, physics, engineering) - the degree does not dictate a single path - it preserves optionality ## 6. math is leverage in interdisciplinary fields - in 2025, the highest-impact work sits between disciplines: - math + cs → ai, systems, theory - math + biology → computational medicine, systems biology - math + economics → market design, mechanism design - math + physics → simulation, materials, climate modeling - math is the shared language that lets you cross boundaries ## 7. math teaches humility and intellectual honesty - proofs force you to confront what you don’t know - counterexamples punish hand-waving - results are either correct or not - status doesn’t help - this builds epistemic discipline rare in opinion-driven fields ## 8. math keeps doors open for graduate study - top phd and research programs still value math rigor highly - even applied fields increasingly expect strong mathematical maturity - math is one of the few majors that does not foreclose advanced options early ## 9. math is one of the best “anti-bullshit” educations - trains you to detect invalid arguments, hidden assumptions, and misuse of statistics - crucial in an era of ai-generated text, persuasion systems, and misinformation - helps separate signal from narrative ## 10. math is slow knowledge in a fast world - most of the world optimizes for speed, visibility, and short-term gains - math optimizes for correctness, depth, and long-term insight - this asymmetry becomes more valuable as noise increases ## honest caveat - math is not a shortcut to money - math is cognitively demanding and often lonely - its value compounds over time, not instantly - but for people who care about understanding, optional freedom, and long-term leverage, it remains one of the strongest majors --- ## File: content/sama.mdx --- title: "sama" publishedAt: "2025-12-23" summary: "distilled thoughts on how to achieve outlier success, inspired by sam altman" tags: ["success", "entrepreneurship", "mindset"] --- - most people start wanting money - many end up wanting to build something meaningful - outlier success usually comes after baseline success - these ideas still apply to almost everyone ## 1. compound yourself - compounding is magic - look for exponential growth, not linear progress - choose careers and projects where learning and impact accelerate over time - avoid paths where 2 years = 20 years of experience - use leverage: capital, technology, brand, networks, people - aim to add another zero to your definition of success - let go of small opportunities for step-change ones - think long-term when others don’t - trust the exponential, be patient ## 2. have almost too much self-belief - self-belief is a force multiplier - most successful people believe in themselves almost to delusion - strong conviction enables contrarian thinking - managing morale requires confidence - ambition attracts resistance - balance self-belief with self-awareness - treat criticism as potentially true, then decide - truth-seeking separates confidence from delusion ## 3. learn to think independently - original thinking is rarely taught - schools reward conformity, not creativity - think from first principles - generate ideas and test them quickly in the real world - failure is expected; being right once matters - grit comes from solving “unsolvable” problems repeatedly ## 4. get good at sales - belief alone is not enough - all great careers involve persuasion - you must sell to customers, hires, investors, media - clear thinking leads to clear communication - written communication is especially valuable - selling what you believe in feels right - sales is learnable with practice - show up in person when it matters ## 5. make it easy to take risks - people overestimate risk and underestimate reward - early career is the best time to take risks - aim for asymmetric bets: lose 1x, win 100x - comfort makes risk-taking harder - avoid lifestyle inflation - keep life cheap and flexible when possible ## 6. focus - focus multiplies effort - choosing the right problem matters more than hours worked - most work people do doesn’t matter - once priorities are clear, execute aggressively - speed correlates strongly with success ## 7. work hard - smart or hard gets you to top 10% - smart and hard gets you to top 1% - extreme effort produces extreme results - momentum compounds - meaningful work is often energizing - working hard is not shameful - stamina predicts long-term success - work hardest early when compounding is strongest - avoid burnout by liking the work and the people ## 8. be bold - hard problems attract better people - ambition creates tailwinds - don’t downscale your goals to match trends - follow curiosity - exciting problems attract support ## 9. be willful - the world bends more than people expect - most people don’t push hard enough - ask for what you want - rejection is normal - persistence creates room for luck - optimism is required - pessimists rarely achieve extreme success ## 10. be hard to compete with - scarcity creates value - if others can do what you do, they eventually will - build leverage through: - personal relationships - personal brand - cross-domain expertise - avoid mimetic behavior - differentiation matters ## 11. build a network - great work requires teams - networks limit or expand what you can do - help people generously over time - take care of collaborators - share upside generously - push people to grow, not to burn out - define yourself by strengths, not weaknesses - hire complementary people - look for rate of improvement, not credentials - ask: is this person a force of nature? - spend time with people who support your ambitions ## 12. you get rich by owning things - salaries rarely create extreme wealth - ownership creates upside - equity scales; time does not - own things that grow rapidly in value - build things people want at scale ## 13. be internally driven - external validation leads to safe, consensus paths - it distorts risk assessment - smart people are especially vulnerable - internal motivation sustains long-term excellence - the best people aim to impress themselves - obsession is required for extreme success - success eventually becomes doing excellent work that matters to you ## closing thought - opportunity is unevenly distributed - luck matters more than people admit - progress is still possible without privilege - long-term belief, effort, and persistence matter - start as early as you can original: https://blog.samaltman.com/how-to-be-successful --- ## File: content/stat-for-transfer-application-for-record.mdx --- title: "stat for transfer application (for record)" publishedAt: "2025-12-22" summary: "record of stats and experiences for transfer application" tags: ["Transfer", "Stats", "Portfolio"] --- - city university of hong kong - math + cs, research enrichment track ### experience - 3x research projects - google deepmind (google summer of code) - founder, stealth startup (ai in speech therapy; 2 accelerators; raised hkd 200k) - swe, underwater robotics team ### hackathons & competitions - 6x wins / finalists ### olympiads - gold, international blockchain olympiad - gold, international data science olympiad - silver, international cryptography olympiad ### guinness world record holder - balloon, 1x ### volunteering & leadership - google developer group hong kong organizer - engineers without borders hong kong volunteer - elderly center volunteer - club lead, google developer group on campus (cityu) - president, cityu college of science chapter - aws ambassador ### rowing - 4th place, local competition ### exchanges - uc berkeley (us) - polytech montpellier (france) ### media & public impact - medisafe controversy: whistleblower behind one of the largest education scandals in recent hong kong history (wikipedia) - founder, hong kong fire database (800+ github stars before takedown due to safety concerns; interviewed by bbc, washington post, and others) ### socials - threads: 83k - facebook: 53k - linkedin: 38k - instagram: 10k - twitter/x: 5k --- ## File: content/the-art-of-invisibility.mdx --- title: "the art of invisibility" publishedAt: "2025-12-23" summary: "invisibility is not about paranoia; it is about agency" tags: ["Privacy", "Security", "OpSec"] --- invisibility is not about paranoia; it is about agency the goal is not to disappear completely, but to control who can see what, when, and why every system leaks; the art is choosing which leaks you can live with ### core principles - assume compromise is possible; design for damage containment, not perfection - separate identities, devices, and roles, no single point of failure - reduce metadata first; content privacy comes second - convenience is the tax you pay for exposure ### threat modeling (before tools) - who might care about your data? - what do they want: content, metadata, or leverage? - are they advertisers, stalkers, corporations, or state-level actors? - how much friction are you realistically willing to tolerate? ### operating systems as a security boundary #### GrapheneOS - hardened android with strong sandboxing and exploit mitigations - minimal attack surface; no google services by default - relevant because modern spyware often relies on zero-click chains - widely discussed after revelations around Pegasus spyware, where fully up-to-date phones were compromised via iMessage / WhatsApp - takeaway: hardware + OS hardening matters more than apps alone #### Qubes OS - security by compartmentalization (qubes) - different tasks live in isolated virtual machines - assumes breach is inevitable; limits blast radius - high friction, but unmatched for journalists, researchers, activists #### Tails OS - amnesic, live system that leaves no trace by default - all traffic routed through tor - ideal for high-risk, short-lived sessions - not a daily driver; a scalpel, not a hammer ### devices and separation - different devices for different identities (work / personal / anonymous) - never mix high-risk accounts with real-name ecosystems - cameras, microphones, basebands are attack surfaces, not features ### network hygiene - tor for anonymity; vpns for location shifting (not anonymity) - dns leaks matter more than people think - public wifi is hostile by default; trust boundaries are imaginary ### accounts and identity - real name, pseudonym, burner: keep them strictly disjoint - phone numbers are toxic identifiers; avoid when possible - email reuse is silent self-doxxing ### messaging realities - end-to-end encryption protects content, not metadata - contact graphs are often more valuable than messages - disappearing messages help, but screenshots always exist ### cloud skepticism - “encrypted at rest” protects providers, not users - backups are long-term memory; attackers love memory - if it syncs everywhere, it leaks everywhere ### lessons from pegasus-era surveillance - zero-click exploits changed the rules - “i didn’t click anything” is no longer a defense - fully patched consumer devices can still be compromised - invisibility today is about resilience, not invulnerability ### psychological discipline - oversharing kills more privacy than hackers - routine is fingerprintable; randomness is protection - silence is sometimes the strongest signal ### trade-offs (be honest) - more security = more friction - more anonymity = less personalization - absolute invisibility is a myth; selective opacity is achievable ### closing note the art of invisibility is not hiding from the world it is choosing which parts of yourself the world gets to see privacy is not secrecy; it is self-determination --- ## File: content/the-iteration.mdx --- title: "the iteration" publishedAt: "2025-12-18" summary: "principles, beliefs, and observations on life, growth, and biology" tags: ["Philosophy", "Life", "Mental Models"] --- ### being - to live fully is to embrace uncertainty - we suffer more in imagination than in reality - man is condemned to be free - one must have chaos in oneself to give birth to a dancing star - reality > narrative - excellence is not an act but a habit ### adaptation - the measure of intelligence is the ability to change - difficulty is just novelty - how capable you are depends on where your fav dopamine hit comes from - if you only read the books that everyone else is reading, you can only think what everyone else is thinking - no price is too high to pay for the privilege of owning yourself ### systemic - to live fully is to seek your own equilibrium (homeostasis) - exposure to novelty rewires neurons (neuroplasticity) - fasted state boosts cellular repair (autophagy mechanisms, 2016 nobel prize in medicine) - the gut shapes thought as much as the brain does (gut-brain axis) - meditation and movement optimize mind and body (neuroplasticity + systemic resilience)