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Helium
@helium 3 years, 6 months ago 495 views

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The other day we shared a thread on the 5 types of work a Hotspot can perform to mine $HNT. Today we take a look at the work of a Challenger in Proof-of-Coverage (PoC).

Challenges are used by PoC to validate wireless coverage. As a Challenger, your Hotspot is chosen by the network to create a challenge, or encrypted multi-layer packet, over the Internet.

The challenge process begins with the Challenger selecting an initial target Hotspot, followed by a group of Hotspots known by the @helium blockchain to be within range of each other as a result of RF witnessing.

These Hotspots are given a multi-layer packet (think an “envelope of envelopes”) that only they can decrypt to prove they are providing legitimate wireless coverage.

The Challenger could be anywhere in the world and does not need to be co-located near other Hotspots. Challenge requests occur every 120 blocks, and if the consensus group accepts the challenge transaction as being valid, the challenge proceeds.

One very cool thing about public key cryptography is that data can be encrypted for decryption by a specific recipient while only knowing the recipient's public key. This allows the Challenger to encrypt each layer of the packet specifically for only certain Hotspots to decrypt.

The Challenger delivers this multi-layered packet via the Internet #p2p network to the first Hotspot in the challenge path.

Once Challengees and Witnesses broadcast and receive the layers of the packet via RF, they send proof they decrypted their layer of the packet back to the Challenger. The Challenger then bundles the receipts together and submits them to the consensus group to be rewarded in $HNT.

The role of the Challenger is similar to something like the role of a client in the @filecoin network. In that case, the client is asking a miner for proof that the file they are storing is still being stored.

In the case of Helium, the Challenger is asking the miners on the network to prove they are still creating network coverage that can be used by devices.

🎙To learn more, listen to this great podcast episode on PoC with @armanhotspot and @amirhaleem: https://t.co/dUx9eFq06d.

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Venkatesh Rao
@vgr

There are only 3 real challenges to free speech at the tech level a) the need for CDNs at scale b) distortions of net neutrality c) nation-state firewalls.

All other claims are about social governance on private sites, where applying free speech doctrine is a stretch at best

Baseline free speech has expanded modestly since 1776 or whatever your reference point is.

About 20% beyond core case of government-critical speech in formally public spaces and media I'd say.

You can (for example) have more kinds of conversations in a bar without getting punched or kicked out by other patrons or management. You can teach more things in colleges than 100 years ago.

That's a genuine de facto increase in practical, informal free speech/expression.

But online free "speech" is, as @reneed has pointed out, not an expansion of free speech at all, but an expansion of reach. It is like the secondary freedom of the press to print as many copies as they can afford, not primary freedom to say what they want

If a newspaper wants to print more copies it has buy more printing equipment and front more upfront costs. Reach for a paper publication is not "free", but a function of desired circulation, which in turn is a function of demand prediction etc. But that logic is obscured online.

Aditya Todmal
@AdityaTodmal

The absolute best 15 scanners which experts are using.

Got these scanners from the following accounts:

1. @Pathik_Trader
2. @sanjufunda
3. @sanstocktrader
4. @SouravSenguptaI
5. @Rishikesh_ADX

Share for the benefit of everyone.

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1. Open

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3. Fake

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Neil S W Murray
@neilswmurray

1) Looking back on my "career" with @TheNordicWeb over the last 5 years, in retrospect it's easy for me to join up the dots and make sense of the journey:

#cphftw #sthlmtech #helyes 🇩🇰🇫🇮🇮🇸🇳🇴🇸🇪

2)

- Join & start community initiatives to meet people
- Learn from these people about how special the Nordic tech scene is
- Share this with the world through The Nordic Web
- Realise the real value is in the data, particularly in building network
- Use network to raise a fund

3) In fact, it looks all very strategic, but the reality is anything but.

My lack of vision and goals during this 5 year period was _criminal_

Any movement from one step to the next was never pre-planned and was instinctive, or worse, accidental.

4) While I am embarrassed to think of my headless chicken self, there's also part of me that thinks that none of this would have turned out where it did if I had of been deliberate and strategic about this.

5) In fact, I think my genuine love for the Nordics and the ecosystem is the MAIN reason to explain how I raised my fund & managed to move from step to step.

My story is a good example of how passion can be more powerful than strategy in the early stage of an idea/company.

Lea Kissner
@LeaKissner

Next up in Privacy Technology at #enigma2021, Kelly Huang from @ethyca speaking about "GONE, BUT NOT "FORGOTTEN"—TECHNICAL & PRACTICAL CHALLENGES IN OPERATIONALIZING MODERN PRIVACY

Just imagine there's a global pandemic forcing everyone to stay home and buy their stuff over the internet. And you've been working on your sanitization-on-demand startup. You've got more users than you can count! ... literally, because your data's all over.

Now you're a multi-national international country with privacy issues because your information is all over the place.

Now a user writes to request you delete their data. Where is it? How do you do that? Who's responsible for privacy in your business.

How do you operationalize privacy rights?

Primary stakeholders:
* Legal
* Business
* Engineering

We spend a lot of time on Twitter analyzing the legal rulings, but it's harder where the "rubber meets the code" 🥁

$Stian H\xe5klev \U000100cf intertwingling Roam graphs$

Stian Håklev 𐃏 intertw...
@houshuang

For people curious about the Roam API and confused by the syntax, or interested in why Conor went with Datomic/Datascript and not a traditional database, this older talk by Roam developer @mark_bastian is a great overview.

He gives great examples using Spiderman of how even modeling something fairly trivial in SQL is much more complex than in Datomic. But the real kicker is when you're trying to interrogate the data to find recursive relationships.

Right now the Roam data model (at least that's exposed to developers) is just about pages, blocks, and children with tags. Already you can see how finding the page containing a block with a certain tag etc is useful.https://t.co/jWJnuKu1RG

But imagine when attribute relationships are fully represented

You should be able to model the entire Spiderman story in Roam.
Page title: Peter Parker
Child of:: [[Richard Parker]] [[Mary Parker]]
Aliases:: [[Spidey]]

etc, and do these kind of queries.

"Show me quotes about operational efficiency in books by authors who used to be in the military"
"Show me companies in Boise, Idaho, founded by women, whose evaluation is lower than 10X ARR"

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John Myles White
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This post is pretty bizarre, but it manages to hit on so many false beliefs that I've seen hurt junior data scientists that it deserves some explicit

(1) The notion that R is well-suited to "building web applications" seems totally out of left field. I don't feel like most R loyalists think this is a good idea, but it's worth calling out that no normal company will be glad you wrote your entire web app in R.

(2) It is true that Python had some issues historically with the 2-to-3 transition, but it's not such a big deal these days. On the flip side, I have found interesting R code that doesn't run in modern R interpreters because of changes in core operations (e.g. assignment syntax).

(3) "Most of the time we only need a latest, working interpreter with the latest packages to run the code" -- this is where things get real and reveal some things that hurt data scientists. If this sentence is true, it's likely because you don't share code with coworkers.

(3) Really is a broader issue in data science: people only think of what they need to do their work if no one else existed and code was never maintained. Junior data scientists almost always operate on projects they start from scratch and don't have to maintain for long.

Vibhu Vashisth
@VIBHU_Tweet

Surkanda devi mandir is a famous shrine of Hindus located near Kaddukhal distt of Uttarakhand, 11 Km from the town of Dhanaulti and 35 Km from Mussoorie.
The Temple is one of the 51 Shakti Peethas spread all over Indian Subcontinent and is dedicated to Goddess Surkanda.

Nestled on a Hill at an Altitude of 2700 m approx, the place offers a splendid view of the snow capped mountains, the picturesque scenic beauty that offers an experience of the lifetime.
The Temple build in the traditional Garhwal style exuberates the Architectural splendour.

The origins of the Surkanda Mata Mandir is attributed to Goddess Sati, consort of Bhagwan Shiv who in a rage immolated herself in her arrogant Father Daksha's Yajna Kund bcoz he didn't invite Bhagwan Shiv in the Yajna.

Devastated by the death of Sati Shiva wandered all over the cosmos performing Tandava-The Dance of Cosmic Destruction.Fearing the total annihilation of cosmos, Gods requested Bhagwan Vishnu to pacify Shiva.Bhagwan Vishnu then used his discuss to destroy the burning corps of Sati.

The pieces of Sati Mata's body then got scattered all over the region which were later established as Shakti Peethas by Bhagwan Shiva himself.Its believed that the head of Sati fell here and it was called Sirkhanda Mata Temple before, but with passage of time it became Surkanda.

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$Billy Bostickson \U0001f3f4\U0001f441&\U0001f441 \U0001f193$

Billy Bostickson 🏴👁&👁 ...
@BillyBostickson

Enough Jaw Jaw, this is War!
1. People's Justice Courts to be set up worldwide
2. Citizens' arrests of all Identified Suspects
3. Lab Inspections
3. Harsh interrogation using MKULTRA
4. Public Show Trials video streamed live
5. Cross Questioning of suspects via Twitter & Zoom
6.

A growing list of suspects to be interrogated

Foul Traitors, Charlatans, Frauds, Bat Molesters! Frankensteins, Well Poisoners, Plotters, Deceivers!
Dr. Shipmans, Saboteurs, Devils in White Coats!

Organisations to be Investigated
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SK
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Kolaru Pathigam-Thevaram hymn composed by ThiruGnana Sambandar- #Thread

In Tamil Kol means planets,Aru means cut- set of songs in Kolaru Pathigam addresses all Navagrahas& last 2 lines of every song with end a plea to Bhagwan Shiva to reduce/erase the ill effects of Navagrahas

கோளறு பதிகம் - This pathigam was sung by Thirugnana Sambandar at Thirumaraikadu Kshetram -Vedaranyam,Tamilnadu

Thirugnana Sambandar & Appar(Thirunavukkarasar) travelled together to various Shiva Alayam to spread shivam & bhakti among people.They both reached Thirumaraikadu.

Thirumaraikadu(Vedaranyam) -
Appar & Sambandar were asked to enter the temple through side entrance.The main door was locked by Vedas many years ago.Appar&Sambandar sang devotional hymns praising Shiva, after which the gates opened & closed.After which main door opened for all.

After darshan of Bhagwan Shiva at Thirumaraikkadu,Sambandar received a message to travel to Madurai.
During that time, Samanam was on the rise in the Pandya Kingdom.The Pandya King converted to Samanam.The Queen Mangaiyarkkarasi was a staunch Shiva devotee and was upset.

Kularchirai Nayanar ,Chief Minister of Pandya kingdom was in agony by the turn of events.Queen requested Kulachirai Nayanar to escort Thiru gnana Sambandar to Madurai.Kularchirai Nayanar met Thiru gnana Sambandar at Thirumaraikkadu & requested him to visit Madurai.

$KENYAN\U0001f1f0\U0001f1ea HISTORY\U0001f1f0\U0001f1ea$

KENYAN🇰🇪 HISTORY🇰🇪...
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Have you ever wondered why the sons and daughters of the colonial chiefs and guards who were collaborators live a good life while those of the MAU MAU fighters live in abject poverty?

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It should be known that the colonialists reached a point that they knew they had 2 leave Kenya since they couldn't handle the Mau Mau war & the world was moving toward accepting independent Africa.However,the colonialists devised an evil scheme that still eats Kenya upto this day

Under this scheme, the colonial state came up with a plan that saw the first crop of chiefly “big men” being empowered financially to take their children to schools and eventually have those children go to England for further studies...

...and eventually providing a ready-made socio-economic & political class whom state power could be entrusted in the post-colonial era.This explains why their children & grandchildren still hold majority of important positions in govt or in the private sector supported by state.

This also explains why children and grandchildren of these homeguards are always given preferential treatment when it comes to government appointments. Wewe na masomo yako you are always asking why you can never get a job in government...yet you're qualified..now you know.