Unexpected result of ArcLength

I want to determine the arc length of a parametric curve $ C: {x (t), y (t) } = { cos (t) ^ p, sin (t) ^ p } $ with $ p $ enter $ 0 and $ 1 $, and $ t $ enter $ 0 and $ pi / 2 $.

I've set up the following function of $ p $:

The[p_] : = Length of arc[{Cos
Method -> {"NIntegrate", MaxRecursion -> 20}]

For $ p = 1 $ we have a quarter circle of radius 1 and we know that the length of the arc is equal to $ pi / 2 $. The function above gives the correct result: 1.5708.

For $ p $ close to zero, the curve is getting closer to a square and we know that the result should be very close to $ 2 $. However, the function does not even approach it. Assess The[1/100] results in 1.30603. Not close to 2 (It's not even bigger than Pi / 2).

Plotted, gives the following results:

Ground[L[p], {p, 0, 1}

enter the description of the image here

Ideas? I am running

google analytics – Unexpected Sampling in the GA Report of All Campaigns

I recently discovered that the report Acquisition> Campaigns> All campaigns is usually sampled in Google Analytics. If I reduced the date range to 1 or 2 days, it might not be sampled, but even some days show sampling.

I have browsed the page of the General Assembly on sampling and nothing seems applicable. The statistics on users and active users are not enabled, it is not a Google Ads report nor the default: no segment is applied, I do not have a Google Ads report. I have not changed the main dimension nor added any secondary dimension that has not clicked any input and have not filtered the table.

All I can find is that this report should not be sampled regardless of the date range. Is there another explanation I miss?

Error parsing: syntax error, & # 39;} & # 39; unexpected

I put this line in a php file but there is a problem, can someone explain what I am doing wrong?

script – For Loop in back and powershell – 1 is unexpected for the moment

I need to start a loop for, from powershell, in cmd … that is to say at the PS prompt:

cmd / c For / L% i in (1,1,5) DO (Echo% i)

But I get a "1, it's unexpected for the moment"

Other answers in my searches indicate that "% i" is a command line and "%% i" a script / batch, but I tried both and none worked. Ideas? Is not it possible?

8 – Error with Symfony: The website encountered an unexpected error. please try again later

I encounter the error: the website has encountered an unexpected error. Please try again later.

In / admin / reports / dblog /, this shows the following error:
Symfony Component HttpKernel Exception BadRequestHttpException: Invalid context ID specified. in Drupal contextual ContextualController-> render () (Zeile 76 in /mnt/www/html/website/docroot/core/modules/contextual/src/ContextualController.php).

I've also tried to update the database, but it was run with another error:
An AJAX-HTTP error occurred. HTTP return code: 200

Could you please help somebody

firefox – HTML link with "noopener" and / or "noreferrer" in Chrome / Chromium causes unexpected behavior

Several attacks are possible when integrating links with target = "_ blank". It's here that rel = "noopener" and rel = "noreferrer" should help.

I'm waiting for me to click on the following link


results in a new browser tab, with new HTML5 session storage.

It works well in Firefox 65.0, but not with Chromium 71.0 and Chrome 72.0.

The problem is that in Chrome / Chromium, the same HTML5 session storage persists.

We can observe exactly the same behavior using rel = "noopener" or rel = "noopener noreferrer".

The state of implementation is listed at the following address:

My questions are:

  • Is this behavior appropriate?
  • Am I missing something?
  • How can I get the desired behavior?

Further reading:

iptables – Forcing SYN Checks to Check for Unexpected Results

According to the article on nixCraft

This iptables rule:

iptables -A INPUT -p tcp! –syn -m state –state NEW -j DROP

-An entrance
-Mental health -p tcp -m tcp! --tcp-flags END, SYN, RST, ACK SYN -m state --state NEW -m comment - comment "LOG non-SYN packets" -j LOG - prefix-log "NOSYN dropped" - log level 1
-Mental health -p tcp -m tcp! --tcp-flags END, SYN, RST, ACK SYN -m state --state NEW -m comment - comment "Force SYN packets" -j DROP

I have seen unexpected drops in my journals:

/var/log/kern.log: 19th of February 13:11:30 [masked] Core: NOSYN DroppedIN = eth0 OUT = MAC = f2: 3c: 91: 96: b7: 8a: 84: 78: ac: 5a: 19: 41: 08: 00 SRC = DST =[masked] LEN = 41 TOS = 0x00 PREC = 0x20 TTL = 117 ID = 4381 DF PROTO = TCP SPT = 50161 TDP = 80 WINDOW = 259 RES = 0x00 ACK URGP = 0 <- dozens of these lines

But in my nginx log files, this user does not seem to have problems: - - [19/Feb/2019:13:08:09 -0700] "GET / HTTP / 1.1" 200 4062 "-" "Mozilla / 5.0 (Windows NT 10.0; Win64; x64) AppleWebKit / 537.36 (KHTML as Gecko) Chrome / 72.0.3626.109 Safari / 537.36" - - [19/Feb/2019:14:07:17 -0700] "GET / HTTP / 1.1" 200 4062 "-" "Mozilla / 5.0 (Windows NT 10.0; Win64; x64) AppleWebKit / 537.36 (KHTML as Gecko) Chrome / 72.0.3626.109 Safari / 537.36" - - [19/Feb/2019:14:08:03 -0700] "GET /download.html HTTP / 1.1" 200 2074 "[masked]"" Mozilla / 5.0 (Windows NT 10.0; Win64; x64) AppleWebKit / 537.36 (KHTML, like Gecko) Chrome / 72.0.3626.109 Safari / 537.36 " - - [19/Feb/2019:14:08:20 -0700] "GET / downloads /[masked].exe HTTP / 1.1 "200 4842504" http: //[masked]/download.html "" Mozilla / 5.0 (Windows NT 10.0; Win64; x64) AppleWebKit / 537.36 (KHTML, like Gecko) Chrome / 72.0.3626.109 Safari / 537.36 "

Every request is successful with the correct size transferred.

I also see rejected packets that leave my IP address on my server on port 993, but I have not encountered any problems recovering email.

Why do I see all these abandoned packets? Is it to expect legitimate traffic?

SQL Server – MSSQL 2008R2 Unexpected Deadlocking Implicit UPDATE with itself on the same record

SQL example:

UPDATE TableA SET SomeTableAColumn = ta.Value
FROM #TempA ta
INNER JOIN TableA ON ta.ID = TableA.ID
O ta.ID = @SomeTableAID

I should also note that TableA has an INSTEAD OF trigger that actually does the update.

The above SQL is run outside of an explicit transaction. Two processes running the above SQL code exactly at the same time for the same record (@SomTableAID is the same in both cases) generated a deadlock.

In both cases, everyone gained a shared lock on the record, and then a stalemate when everyone tried to switch to an update lock. The addition of an appropriate locking index helped to avoid the problem.

But, my question is … why is locking done? Is not it obvious that the target line is going to be updated? Is there a more appropriate way to do this? Or should I remember to add a lock index every time I use this update template?

Or … is this all because of the operation of the INSTEAD OF trigger?

javascript – Uncaught SyntaxError: Invalid or unexpected token – Error in .js file calls

I downloaded the site files for maintenance. When they are in the cloud, those files that display an error locally do not report any errors.

This problem is repeated with this and other sites.

Some versions:

  • JQuery> v1.11.1
  • Vegas> v2.1.3
  • Bootstrap> v3.3.5
  • GMAP3 7.1

I would like to solve the problem without needing to refactor the entire application because there are multiple sites with the same event.

I've tried to change the version of JQuery thinking that it might be changing "Jquery" to "$" in the newer versions of the library, but the problem has not been solved.

I've tried using Jquery Migration, which has not solved the problem either.

* RE – Adding previous errors as requested *
insert the description of the image here

Google Chrome console showing JQuery errors and other JS files

windows 10 – How to identify the root cause of unexpected reboots?

In the last few months, my computer has started to restart in a seemingly random way. It cuts off instantly, as if I had pressed the reset button, and starts normally. There are no common traits that I can identify; this sometimes happens in games, sometimes in apps, sometimes just on the desk without anything demanding. There is no indication of any updates, installations, electrical anomalies or temperature spikes that coincide with restarts, nor is there any indication of BSOD or dump files to find.

The observer of events is singularly useless; I get Kernel-Power's criticism that "the system has restarted without shutting down properly before, this error can occur if the system stops responding, it is down or it has suffered an unexpected power outage. " (Event ID 41, Critical, Category 63, Keywords (70368744177664), (2)) These messages are typically timestamped approximately 15 seconds before the restart logging time.

During the next restart, EventLog will get an error stating that "The previous system shutdown was unexpected." (Event ID 6008, Error, No Category, Keywords Classic) There will also be a Kernel-Boot information event stating that "The success status of the last stop was false, the success status of the last start. was true. "

My computer runs on Win 10 (64 bit), with an Asus Z370-P, an Intel 8700 clocking 3.20 GHz, 16 GB Corsair RAM and a GeForce GTX 960.

I've tried using Performance Monitor and various other systems to look for the usual signs of instability, but without success. I would rather avoid rebuilding the system as much as possible.

No advice?