blockchain – How to fix the duration and size of blocks when the volume of transactions increases constantly?

When the transactions are received, the nodes keep them in memory (the MemPool) while the extraction software is trying to exploit a new block. A minor will try to place as many transactions as possible in a block, so as to earn more money if he succeeds in extracting a block.

If there are more transactions than the block can contain, the minor must filter them to include enough, while respecting the size limit of the block. The filtering method typically used is to classify transactions based on fees paid and to include transactions with the highest fees because the payment is the most important if they are successful in exploiting the block.

All transactions left in mempool will then be candidates to be added to the next block in the chain, but will be placed under the same filter while additional transactions also enter the network. This means that a transaction that pays only a small fee can stay in mempool for a long time because it takes precedence over transactions that pay more.

This creates a paying market for the placeholders. People who demand that their transactions be processed quickly – the following blocks will pay higher transaction fees, which will put them at the top of the queue, while people who do Urgency for their transactions to be processed pay a lower fee and be prepared to wait until the size of the mempool is reduced.

As the volume of transactions increases due to increased demand, users must either pay more fees or use new technologies to reduce the size of their transactions and pay less fees. Some techniques for doing this include grouping transactions, using payment channels (such as Lightning Network), using sidechains, and using future enhancements to bitcoin itself, which will allow for signature aggregation and deletion. untested branches of bitcoin script.

If I understand correctly, the network rejects the blocks of more than 1 MB and the difficulty of hashing block is defined after the creation of each block, so as to maintain the blocking time close to 10 minutes.

The difficulty is adjusted every block of 2016 (about 2 weeks) taking into account the blocks created during this period. Blocks are not necessarily every 10 minutes because it is a random process that searches for a valid hash that is less than the target value and can range from a few seconds to an hour or more. It lasts on average about 10 minutes over long periods of time due to the regular adjustment of the difficulty.

calculation – Look for where I was wrong: find the volume of a solid that is in both a cylinder and a sphere

I am currently working on this issue:

Find the volume of the solid that is in both the cylinder $ x ^ 2 + y ^ 2 = $ 1 and the sphere $ x ^ 2 + y ^ 2 + z ^ 2 = $ 4.

I decided to use the polar coordinates for the cylinder equation to become $ r ^ 2 = $ 1 and the sphere becomes $ r ^ 2 + z ^ 2 = $ 4.

Solve for $ z $, I receive inequality $ – sqrt {4-r ^ 2} leq z leq sqrt {4-r ^ 2} $. Since I know what $ r ^ 2 $ is, I plug this in to get the inequality where $ z $ entered $ – sqrt {3} $ and $ sqrt {3} $. By combining this to make a triple integral, I receive:

$ int_0 ^ {2 pi} int_0 ^ 1 int _ {- sqrt {3}} ^ sqrt {3} rdzdrd theta $

However, Slader has a different answer where they do not connect $ sqrt {3} $ within. Why not connect the value for $ r ^ 2 $ to do the wrong calculation? It's not $ r ^ 2 $ always $ 1 $?

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How can I access a historical image, a certain day, to a certain volume?

I need to know how to display an image at a specific date and time. Is it possible?

security – E: unknown volume for the path [/odm] and E: unknown volume for the path [/vendor]

I am new to the forum and I am really struggling and have a hard time finding ATMs. I hope you can understand and want to help me.
A few days ago, I installed a virus on my phone (I know it's stupid, but it happened). I did a factory reset on my phone 2 times (from the boot menu and Android setting).

Now, when I open the boot menu, I see the following:

File-based OTA
API supported: 3

E: Unknown volume for the path [/odm]
E: Unknown volume for the path [/vendor]
E: Unknown volume for the path [/odm]
E: Unknown volume for the path [/vendor]

dmverity hash tree successfully verified

it really made me panic.
I've removed the SD card and when I restart the boot mode, it always says this information
Has the virus rooted my phone or is it still in?
For now, I have disconnected from the internet and that is all.

Can any one please tell me where this is coming from.

Thanks in advance

performance – How to monitor the speed and volume of data transfer between two computers on the same network

My application on the Win2012 server stores its cache on a ZFS appliance on the local network. During peak loads, we notice performance degradation. This only happens in the production environment where we do not have debugging access. All troubleshooting up to now indicates this network access, but we can not determine it with certainty because we have no concrete evidence. My question is: is there a way to monitor this network data transfer using Perfmon or something else?

pr.probability – Unconditional lower limit for swelling volume $ mu (B ^ epsilon) $ for $ mu (B) in (0, 1) $ and $ epsilon> 0 $ not "too big "

For a subset of Borel $ B $ of a metric space $ X = (X, d) $ and $ epsilon> $ 0, remember the definition of $ epsilon $-blowup of $ B $to know $ B ^ epsilon = {x in X | d (x, B) the epsilon } $. Let $ mu $ to be a measure of probability on $ X $and suppose $ 0 < mu (B) <1 $. Under certain conditions (on $ mu $), we know that $ 1- mu (B ^ epsilon) $ decreases exponentially with the increase $ epsilon ge epsilon_0 $, or $ epsilon_0> $ 0 is a phase transition point. It is the phenomenon of measurement-concentration in the metric spaces. For example, Corollary 1.1 of Otto-Villani (2000) shows such a result with $ epsilon_0 = sqrt {2 log (1 / mu (B))} $ for measures satisfying the Talagrand inequality of transport costs.

Can we have an unconditional upper limit (perhaps something non-exponential, but polynomial in $ epsilon $) for $ 1- mu (B ^ epsilon) $ valid for "small" $ epsilon $, let's say for all $ epsilon le epsilon_0 & # 39; < epsilon_0 $ ?

macos – failure to download installer information on uploading the mojave file to the target volume

I am a new Apple user, I want to upgrade my operating system to MacOs Mojave. When I click Continue, it takes a while, and then a message appears telling me that downloading the installer information to the target volume failed.
I've followed some tips on upgrading the lunch from another administrator account (although it sounds like a silly idea), but it does not work. I've also tried lunch in safe mode but nothing new.
Help me, please.

keyboard – How to control the volume on a Philips monitor

So I just installed a 48 "widescreen monitor in my home office, but I can not use the f10 – f12 keys to control the volume anymore.

I have a colleague provided this guide:
http://www.lifewire.com/select-audio-in-and-out-from-mac-menu-bar-2260855

This has placed the volume icon in the menu bar, but dimmed. I still can not change the volume.

No suggestion?

Where can I find the transaction volume?

I want to find the volume of the exchanges to make a trend analysis. But I do not find

Is it possible to recover an accidentally deleted AFPS volume?

Nothing has been changed or formatted.
The "container" is not mounted and the volume that I inadvertently deleted is still displayed in the boot.

Has anyone had a good experience of recovery?
Thanks in advance