home.social

#density — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #density, aggregated by home.social.

  1. Osipova & Lin also evaluate variation in #paleobiodiversity between depositional #environments of the Szekou Formation. Species #richness and #density do not differ significantly between restricted and open #lagoon settings, contrasting with patterns reported for benthic #bivalves

  2. Most bigger screens even though they say they're #UHD are still not giving you a high pixel per inch count. #Pixel #density matters. A lot. When you're looking at art I make either on my phone with like a 500 plus PPI or the tablet with 240 PPI and you look at it on a 96 PPI screen. #DOA

  3. Behold this immutable fact of city-building. We've always built the most expensive way possible. Previous council took real, bold steps to fix this. New council debating repeal. In it's place, what? Anything? Another panel? Another study? #Housing #Rezoning #yyc #yyccc #Sprawl #UrbanSprawl #Density

  4. Series Summary
    “One habit per day = healthy hair”

    🔹 Heat, chemicals, and mechanical stress are the main damaging factors.
🔹 Proper hair care = prevention.

    🔹 Small consistent steps lead to big results.

    🌿 How to improve: gradually implement the recommendations into your routine.


    Navigation: #LMHV_Series #LMHV_Day50 #LMHV_Summary #LMHV_HealthyHair
    General hashtags: #LookMedicHairVitamins #LookMedic #hair #hairgrowth #density #hairlossprevention #scalp #strengthening

  5. Supplements Without Guidance
    “Random supplements = risk”

    🔹 Can affect hormones unpredictably.

    🔹 Strains liver function.

    🔹 May worsen hair loss.

    🧬 How to improve: diagnose first, then follow professional advice.


    Navigation: #LMHV_Series #LMHV_Day45 #LMHV_Supplements #LMHV_Risk
    General hashtags: #LookMedicHairVitamins #LookMedic #hair #hairgrowth #density #hairlossprevention #scalp #strengthening

  6. Vitamin Overdose (A, E)
    “Too much vitamins = opposite effect”

    🔹 Can increase hair shedding.

    🔹 Dries out scalp.

    🔹 Causes brittleness.

    ⚠️ How to improve: take supplements only after blood tests.


    Navigation: #LMHV_Series #LMHV_Day44 #LMHV_Vitamins #LMHV_Overdose
    General hashtags: #LookMedicHairVitamins #LookMedic #hair #hairgrowth #density #hairlossprevention #scalp #strengthening

  7. Tight Headwear
    “Overheating scalp = weak roots”

    🔹 Reduces scalp microcirculation.

    🔹 May cause itchiness.

    🔹 Hair becomes greasy faster.

    🧢 How to improve: choose loose hats made from natural fibers.


    Navigation: #LMHV_Series #LMHV_Day41 #LMHV_Headwear #LMHV_Overheat
    General hashtags: #LookMedicHairVitamins #LookMedic #hair #hairgrowth #density #hairlossprevention #scalp #strengthening

  8. Wrong pH Shampoo
    “Incorrect pH = cuticle damage”

    🔹 Hair becomes frizzy.

    🔹 Dryness increases.

    🔹 Scalp may flake.

    🧪 How to improve: choose shampoo with pH 5.0–5.5.


    Navigation: #LMHV_Series #LMHV_Day39 #LMHV_pH #LMHV_Cuticle
    General hashtags: #LookMedicHairVitamins #LookMedic #hair #hairgrowth #density #hairlossprevention #scalp #strengthening

  9. Dry Air
    “Dry air = brittle ends”

    🔹 Reduces hair moisture.

    🔹 Increases frizz.

    🔹 Makes hair more fragile.

    🌬 How to improve: use a humidifier indoors.


    Navigation: #LMHV_Series #LMHV_Day37 #LMHV_DryAir #LMHV_Brittleness
    General hashtags: #LookMedicHairVitamins #LookMedic #hair #hairgrowth #density #hairlossprevention #scalp #strengthening

  10. Micronutrient Deficiency
    “Lack of vitamins = weak hair”

    🔹 Hair shaft thins.

    🔹 Density decreases.

    🔹 Shine deteriorates.

    🥗 How to improve: include diverse foods and get tests for deficiencies.


    Navigation: #LMHV_Series #LMHV_Day36 #LMHV_Micronutrients #LMHV_Deficiency
    General hashtags: #LookMedicHairVitamins #LookMedic #hair #hairgrowth #density #hairlossprevention #scalp #strengthening

  11. Chemical Perms
    “Chemicals = hair structure change”

    🔹 Weakens keratin bonds.

    🔹 Increases brittleness.

    🔹 Causes dryness and porosity.

    💭 How to improve: do perms less often and follow up with reconstructing treatments.


    Navigation: #LMHV_Series #LMHV_Day34 #LMHV_ChemPerms #LMHV_Keratin
    General hashtags: #LookMedicHairVitamins #LookMedic #hair #hairgrowth #density #hairlossprevention #scalp #strengthening

  12. Hormonal Fluctuations
    “Hormones = impact hair growth”

    🔹 May trigger hair loss.

    🔹 Thins the hair shaft.

    🔹 Slows follicle renewal.

    ⚕️ How to improve: check thyroid and hormonal profile.


    Navigation: #LMHV_Series #LMHV_Day33 #LMHV_Hormones #LMHV_HairLoss
    General hashtags: #LookMedicHairVitamins #LookMedic #hair #hairgrowth #density #hairlossprevention #scalp #strengthening

  13. Cheap Hair Dyes
    “Low-quality dyes = aggressive chemicals”

    🔹 Increase allergy risk.

    🔹 Severely damage the cuticle.

    🔹 Make hair dull.

    🎨 How to improve: choose trusted brands and gentle formulas.


    Navigation: #LMHV_Series #LMHV_Day32 #LMHV_HairDye #LMHV_Chemicals
    General hashtags: #LookMedicHairVitamins #LookMedic #hair #hairgrowth #density #hairlossprevention #scalp #strengthening

  14. Sauna and Steam Rooms
    “Overheating = moisture loss”

    🔹 Opens the hair cuticle.

    🔹 Hair becomes dry.

    🔹 Increases breakage.

    🔥 How to improve: protect hair length with oil or towel before sauna.


    Navigation: #LMHV_Series #LMHV_Day31 #LMHV_Sauna #LMHV_Overheat
    General hashtags: #LookMedicHairVitamins #LookMedic #hair #hairgrowth #density #hairlossprevention #scalp #strengthening

  15. Incorrect Mask Application
    “Mask on roots = overload and greasiness”

    🔹 Clogs scalp pores.

    🔹 Triggers itch and inflammation.

    🔹 Weighs down roots.

    🧴 How to improve: apply masks only on mid-length and ends.


    Navigation: #LMHV_Series #LMHV_Day29 #LMHV_Masks #LMHV_Overload
    General hashtags: #LookMedicHairVitamins #LookMedic #hair #hairgrowth #density #hairlossprevention #scalp #strengthening

  16. Incorrect Mask Application
    “Mask on roots = overload and greasiness”

    🔹 Clogs scalp pores.

    🔹 Triggers itch and inflammation.

    🔹 Weighs down roots.

    🧴 How to improve: apply masks only on mid-length and ends.


    Navigation: #LMHV_Series #LMHV_Day29 #LMHV_Masks #LMHV_Overload
    General hashtags: #LookMedicHairVitamins #LookMedic #hair #hairgrowth #density #hairlossprevention #scalp #strengthening

  17. Incorrect Mask Application
    “Mask on roots = overload and greasiness”

    🔹 Clogs scalp pores.

    🔹 Triggers itch and inflammation.

    🔹 Weighs down roots.

    🧴 How to improve: apply masks only on mid-length and ends.


    Navigation: #LMHV_Series #LMHV_Day29 #LMHV_Masks #LMHV_Overload
    General hashtags: #LookMedicHairVitamins #LookMedic #hair #hairgrowth #density #hairlossprevention #scalp #strengthening

  18. Sleeping With Wet Hair
    “Wet hair = maximum damage risk”

    🔹 Friction against the pillow increases breakage.

    🔹 Hair deforms while drying.

    🔹 Increases split ends.

    🌙 How to improve: dry hair before sleeping.


    Navigation: #LMHV_Series #LMHV_Day28 #LMHV_WetHair #LMHV_Breakage
    General hashtags: #LookMedicHairVitamins #LookMedic #hair #hairgrowth #density #hairlossprevention #scalp #strengthening

  19. The glider now has 12 pounds of lead shot and epoxy added to dead space in the very end of the tail boom.

    My initial estimate of volume indicated that I could add 8 - 10 pounds this way. I'm pleasantly surprised, and I didn't make a chocolate covered mess of things as I was pouring this goop into the tail.

    I need to add a few more pounds to the tail. Phase two of this project will use lead plate, bolted to the vertical fin spar. (I need to unroll the 1/4-inch plate first, then develop a template to cut the lead.)

    I could not add the epoxy/lead shot mix all at once because of the exothermic reaction of epoxy. When mixed epoxy is in a thick blob (instead of a thin layer), it generates enough heat to warm itself...which accelerates the chemical reaction...releasing more heat...further accelerating the reaction.... I have seen epoxy smoking hot because of this, so I added a bit, waited a half hour, checked temperature with an IR non-contact thermometer, added a bit more when it was clear that the exotherm was only very mild, etc. That took a while, but turned out well.

    I note that Roto Metals has a discount on some 1-inch lead plate. Get your fork lift ready. No free shipping!

    rotometals.com/lead-sheet-plat

    #AvGeek #Aviation #ElectricAircraft #Homebuilt #Glider #DIY #EAA #Ballast #Math #Density #Exothermic #Chemistry #Thermodynamics #Lead #Epoxy

  20. Average density: the key to sustainable urban planning?
    Before the advent of the motor car and the widespread use of lifts, three- or four-storey buildings predominated.

    👉Discover MORE and SUBSCRIBE to our summary of news and updates through link: amusementlogic.com/general-new

    🏘️ #urbanism #sustainability #density #city #urbanismo #sostenibilidad #densidad #ciudad #arquitectura #urbanisme #durabilité #densité #ville #architecture

  21. In today's episode of "Math #Mystifies #the #Masses," we dive into the riveting world of #probability #density #functions and #interpolation factors—because apparently, nothing screams excitement like calculating how an "entropy bulge" curves upward. 📈🤯 Spoiler alert: It's concave! Stay tuned for more edge-of-your-seat #algebraic #adventures. 🙄
    cgad.ski/blog/entropy-of-a-mix #Math #Factors #Entropy #Bulge #HackerNews #ngated

  22. New publication doi.org/10.1103/PhysRevB.111.2

    New algorithm for the #inverseproblem of Kohn-Sham #densityfunctionaltheory (#dft), i.e. to find the #potential from the #density.

    Outcome of a fun collaboration of @herbst with the group of Andre Laestadius at #oslomet to derive first mathematical error bounds for this problem

    #condensedmatter #planewave #numericalanalysis #convexanalysis #dftk

  23. #bootable portal extra tools #density #io

    from chatgpt onYou said:
    compare usb flash drives to nvme in external enclosure - latency and overall speed comparison
    ChatGPT said:

    Great question — let’s break this down clearly.
    ⚡ USB Flash Drives vs. NVMe in External Enclosure
    Aspect USB Flash Drive NVMe in External Enclosure
    Underlying Technology NAND flash on a basic controller (often slower, fewer channels) High-speed NVMe SSD on PCIe lanes inside an enclosure with USB-C or Thunderbolt interface
    Typical Interface USB 2.0, 3.0, 3.1, 3.2 (5–10 Gbps) USB 3.1/3.2 (10–20 Gbps) or Thunderbolt 3/4 (up to 40 Gbps)
    Sequential Read Speed ~100–400 MB/s (high-end USB 3.2 models) 900–2,800 MB/s over USB 3.2; up to ~3,000–4,000 MB/s with Thunderbolt
    Sequential Write Speed ~50–300 MB/s (often slower due to cheaper controllers) 900–2,500 MB/s over USB 3.2; higher with Thunderbolt
    Random Read/Write IOPS Very low (~1,000–10,000 IOPS), latency ~100–500 µs Much higher (~100,000–600,000 IOPS), latency ~20–100 µs
    Latency High (slow controller, weak queueing, high protocol overhead) Low (PCIe NVMe is optimized for low latency; enclosure adds some but still faster)
    Performance Stability Degrades quickly on large sustained writes (thermal or cache limits) Much more stable under heavy or sustained workloads (thanks to DRAM cache, better controller)
    Use Case Suitability Best for occasional file transfers, light usage Suitable for heavy file transfers, external boot drives, video editing, virtual machines, fast scratch disks
    Cost per GB Low Higher (but dropping steadily)
    Thermal Considerations Generally none (low power, low heat) Needs proper enclosure cooling; NVMe can throttle under sustained load
    🔍 Latency Details

    USB flash drives use simple microcontrollers designed for cost, not performance.
    Latency is often >100 microseconds per request, plus protocol stack delays.

    NVMe SSDs inside an external enclosure are fundamentally designed for high-performance PCIe operation:

    Even though USB/Thunderbolt adds some latency, overall you get ~20–100 microseconds access times — significantly lower.

    NVMe also benefits from parallel command queues (up to 64K queues) while USB flash sticks typically handle just one or a few.

    💡 Real-World Speed Examples
    Scenario USB 3.0 Flash Drive NVMe + USB 3.2 Enclosure
    Copying 10 GB file ~5–10 min (100 MB/s) ~20–30 sec (400–500 MB/s over USB)
    Running OS or apps (external boot) Feels slow, long delays Feels near-native, snappy performance
    Editing 4K video off disk Likely choppy or slow Smooth playback and editing
    🚀 Summary

    ✅ NVMe in an external enclosure is vastly faster in both throughput and latency — essentially turning your external drive into a portable high-speed SSD.
    ⚠ USB flash drives are convenient but optimized for simplicity and cost, not speed.

    If you want to boot an OS, run virtual machines, edit large media, or move lots of data, NVMe is a huge upgrade.

    If you just want to carry around some documents or backups occasionally, a decent USB stick is still fine.

    If you tell me your use case, I can help recommend the best external drive setup! Want me to suggest some specific models?
    You said:
    do this - plan out a bootable encrypted persistence drive with all the bells and whistles - it is based on kali everything and has all the tools plus some kali everything leaves out, notably it is geared to have a full wiki dump imported into mediawiki, it also has a giant solr index from say top 100 sites and what else? i would like the tone to be specialized as a dx/pentesting but also serving tool - maybe have some components of my cms/portals idea installed, it couldd be customized for various sectors but initially for infosec/IT....you have a 2 tb nvme - fill it up to 1.4gb to leave some space. maybe include pihole and opnsense and malcolm images, have scripts that will run and gather data into a buffer in memory but also on the drive. so the tool should have a open source license but also some community gen resources for how to use with proprietary data and sw and extend. heavy emphasis on osint, versioning, ai and leveraging info - maybe even have some info on going more api less and more on getting reliable feeds, hooking it up to a vps over a vpn to offload and scale, even easy clustering - you could spin up this image on a vm if you wanted to scale cluster
    ChatGPT said:

    🔥 Plan: Bootable Encrypted Persistence Kali + Specialized DX/Pentest/OSINT Mega Toolkit 🔥

    Here’s a detailed, structured build plan for your 2TB NVMe to create a bootable, encrypted, persistent, heavy-duty pentesting + data-ops drive geared for infosec, IT, and OSINT power use.
    🛡 Core Design Goals

    ✅ Bootable Kali “Everything” (with persistence, encryption, and full toolset)
    ✅ Preloaded MediaWiki with full offline wiki dump (e.g., English Wikipedia)
    ✅ Prebuilt Solr search index from top ~100 important sites (infosec, tech, OSINT)
    ✅ Pi-hole, OPNsense, Malcolm IDS preinstalled images or containers
    ✅ Custom CMS/portal framework (seeded for infosec/IT sector, but extendable)
    ✅ Ready-to-run scripts and collectors for real-time OSINT + memory buffering
    ✅ Designed for local offline power use but able to scale to VPS or clusters over VPN
    ✅ Heavy on open-source tooling but flexible for commercial integration
    ✅ Includes AI tools and resources for RAG (retrieval-augmented generation), versioning, and live intelligence
    🧱 Drive Structure (2TB NVMe, ~1.4TB Used)
    Partition Size Contents
    Boot partition (GRUB, EFI) ~1 GB GRUB, encrypted LUKS bootloader, persistence hooks
    Root (/) encrypted ext4 ~200 GB Kali “Everything” + added tools, drivers, configs, core scripts
    /home encrypted ext4 ~200 GB Personal configs, CMS/portal configs, collected data, user scripts
    /data encrypted ext4 or ZFS ~1.0 TB MediaWiki + offline dumps, Solr index, Malcolm + IDS data, Pi-hole data, CMS DBs
    Swap (encrypted) ~64–128 GB Large swap for memory buffers, AI tools, and clustering workloads
    Spare space ~400–600 GB free For additional VMs, containers, OS snapshots, sandboxed work, or expansion
    🔧 Major Software Components

    ✅ Kali Linux Everything +

    Extra tools not included:

    Ghidra, Angr, Volatility, BloodHound, CrackMapExec

    CyberChef offline version, Sigma rules, Mitre ATT&CK navigator offline

    Big malware sample zoo (if legally permissible) in quarantined area

    Local GitLab instance for version control of tools/scripts

    Docker, Podman for running OPNsense, Pi-hole, Malcolm, etc.

    ✅ MediaWiki with Offline Dump

    Preload with latest full English Wikipedia (or curated infosec/IT subset)

    Fully searchable, customizable offline knowledgebase

    Optionally add other dumps: Stack Overflow, Exploit DB, CVE DB, etc.

    ✅ Apache Solr Index

    Prebuilt Solr/Lucene index with crawled top 100 infosec and tech sites

    Local search + analytics, extendable with own crawls or enterprise datasets

    ✅ Pi-hole, OPNsense, Malcolm

    Pi-hole as local DNS sinkhole on container or VM

    OPNsense router/firewall images ready to deploy on VM or embedded hardware

    Malcolm for network capture, PCAP indexing, IDS analytics

    ✅ Custom CMS/Portal Layer

    Start with lightweight Django or Flask app

    Connects local tools, dashboards, script runners

    Modular design for sector-specific extensions (infosec, IT, fintech, etc.)

    Supports community-developed modules, licensed as open source

    ✅ OSINT + Data Collection Scripts

    Parsers for RSS, Atom, social feeds

    In-memory collectors (RAM-buffered) and disk-backed archival

    Configurable pipelines for scraping, crawling, and syncing feeds

    Exporters to push to VPS, cluster, or partner nodes over VPN

    ✅ AI + RAG Toolkit

    Local vector DB (e.g., Milvus, Weaviate, Qdrant)

    Lightweight LLMs (e.g., GGUF models) preloaded with open weights

    Scripts for embedding + querying wiki, Solr, Malcolm data

    Tools to link out to API-less, robust scraping and offline enrichment

    ✅ Cluster + VPS Extensions

    WireGuard or Tailscale VPN ready to connect to offload nodes

    Cluster startup templates (VM- or container-based) to scale horizontally

    Option to replicate toolstack on cloud VPS for remote jobs

    ⚙ Preloaded Scripts + Tools

    ✅ Quick setup script for new sector (infosec/IT → medical → finance → etc.)
    ✅ Automated updater for tools, dumps, feeds, AI models
    ✅ Data sync script (selective or full) to VPS or peer node
    ✅ Local dashboard UI (web-based) to manage collectors, scrapers, solr, wiki
    ✅ Burn-in tester + disk health monitor to ensure drive integrity under heavy loads
    🔒 Security + Encryption

    LUKS full-disk encryption with strong passphrase + Yubikey/2FA support

    Encrypted swap to prevent memory leakage

    Hidden encrypted vault (Veracrypt or LUKS hidden volume) for sensitive payloads

    Scripted integrity checkers + hashes to ensure toolchain hasn’t been tampered

    Optional self-destruct script or wipe trigger on tamper detection

    📦 Final Disk Fill

    With ~1.4TB occupied, you get:
    ✅ 80–100 GB: Full offline wiki, MediaWiki + DB
    ✅ ~200–300 GB: Solr search index
    ✅ ~200–300 GB: Container + VM images (OPNsense, Pi-hole, Malcolm, etc.)
    ✅ ~200–300 GB: Local tool binaries, scripts, models, datasets
    ✅ ~200–400 GB: Spare user + working space, logs, collected data
    🏗 Customization & Licensing

    Open-source license (e.g., GPLv3, MIT) for your tooling and integrations

    Community guide + wiki on using it with proprietary/commercial data

    Template configs + YAML/JSON to extend it for any industry

    Local-first design but ready for hybrid/cloud scaling

    Emphasis on reproducibility + versioning: snapshot, rollback, extend

    🌐 How You Can Use It

    ✅ Boot as your all-in-one pentest/OSINT lab anywhere
    ✅ Plug into a workstation or cluster as a scaling node
    ✅ Push/pull data to a VPS for remote jobs, aggregation, enrichment
    ✅ Serve as an offline knowledge + intelligence center when disconnected
    🛠 Next Steps

    If you want, I can:
    ✅ Write out the build script / setup checklist
    ✅ Generate a detailed disk partition map + encryption scheme
    ✅ Provide YAML or Docker Compose configs for the containers
    ✅ Build out example CMS/portal components for your sector
    ✅ Recommend hardware (NVMe enclosure, host systems)

    Want me to prepare the detailed technical setup or generate a GitHub starter project? Let me know! 🚀 moving from usb to bootable nvme, also bootable enc persistent image with tools+ info and serving not just winpe dx #bootable portal #generic

  24. Turbulence Characteristics Of Ice-Free Radiatively Driven Convection In A Deep, Unstratified Lake
    --
    doi.org/10.1029/2024GL112607 <-- shared paper
    --
    [anecdotally, I have experienced this scuba diving in a drysuit in WA and BC, especially in freshwater, so it is wonderful to see some background]
    #GIS #spatial #mapping #remotesensing #ROV #water #hydrology #underwater #GreatLakes #LakeSuperior #density #temperature #freshwater #lake #stratified #stratification #colder #warmer #mixing #convective #survey #energy

  25. #Household #expenditure on control of #urban #mosquitoes #Aedes albopictus and #Culex pipiens in #Emilia-Romagna, Northern #Italy journals.plos.org/plosntds/art

    Control activities that lower the #mosquito #density in both private and public areas could reduce the use of household #insecticides in urban environments and the related costs, and the risk of spread of imported #arboviruses as well.

  26. @climate @geography
    The previous comparison of two maps shows similar to a study of Per Capita CO2 Emissions:
    Oil-producing countries in the Persian Gulf are the highest expellents of CO2 per person, followed by developed countries like the #USA, #Australia, #NewZealand, and #Canada: visualcapitalist.com/visualizi

    #GHG #CO2 #DataViz #economy #production #industry #energy #oilAndGas #density #anthropocene #emissions #emitters #expellents #developed #OECD

  27. @0 @vij @chris @msquebanh

    I don't think it's a matter of #optimistic vs. #pessimistic. It's that the #engineering, #infrastructure, #economics, #population, population #density, and #remoteness of #France are utterly #unlike what they are here in the #prairies.

    2 years? Not possible here. If we wanted to replace 80% of ICE vehicles with BEVs, we need major electrical #generation and #transmission upgrades. I'm #guesstimating it it started today, it would take 20 years.

  28. People losing home #insurance is not the fault of insurers: they have been warning everyone, through the language of insurance premiums. And no-one has been willing to listen to them. until now that they're starting to drop coverage.

    Hard discussions need to be had, about curbing developers, but also about building higher #density, building in-fill housing, housing that is not #SingleFamily, all those third-rail topics. We need to have these discussions, everywhere.

    nzherald.co.nz/business/projec