Getting the bandwidth of the client?
hi
can anybody tell me how can we get the bandwidth of the clients that are connected through java sockets ?
/Pushpak
No you can't unless you know that the client has a bandwidth that is lower than yours, and it hasn't any other upload/downloads at the same time.
And you can't always expect the client to have a lower bandwitdth. In sweden many home users have 100Mbit connections.
/Kaj
Similar Messages
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How to get the bandwidth of current network
I want to know the bandwidth of the internet connection established to the blackberry mobile.Is there any specific Api for that.. ? Anyone knows please let me know...
thnks prinujithHello prinujith and welcome to the BlackBerry® Support Community Forums.
Thanks for your question on network speeds.
Such questions are best addressed by your mobile network carrier as they are the ones that provide the service and would best know the specifics of the provided service.
Thanks!
-HMthePirate
Come follow your BlackBerry Technical Team on twitter! @BlackBerryHelp
Be sure to click Kudos! for those who have helped you.Click Solution? for posts that have solved your issue(s)! -
Can i limit the bandwidth used in the oracle database
hi guys
my database is centralized on linux 4 OS and we have above than 400 client connect to it, and the network bandwidth size is compatible but every day from 1:00 PM to 3:00 PM the network become slowdown because there are consuming the network bandwidth, all of the clients from 1:00 to 3:00 they are send the requests to the database and for that reason the network become slow for the huge of transaction.
so we don't want to increase the bandwidth.
NOTE:-
all the client can send the requests from 7:00 AM upto 5:00 PM
is there any configuration file or parameter that allow me to control the bandwidth to each client ?
with my regardIt would be easier to throttle traffic at the network level than the sqlnet level.
If you use sqlnet over ssh you get encryption in addition to some compression. (I have not tested this)
Some user education may help - e.g tell them to use proper select criteria instead of big searches.
Some application development may help - e.g move more processing from the client to the DB. -
How do i extend the bandwidth of my system
The control problem I am having is extending the bandwidth of a force control system. The system is used to apply mechanical load to bone to facilitate research into Osteoporosis. The following concisely describes the system and the different things I have tried to solve the problem,. I imagine it is quite lengthy compared to the usual questions but any advice you have to offer to a Mechanical engineer would be much appreciated.
System Description:
I am using Labview (with Flex motion) to program the NI 7344 motion control servo board (PID update rate of 62.4 micro-seconds). This output signal is then amplified by the MID 7654 power amplifier, supplying current to a Voice coil (this can be considered as a Linear DC motor with a bandwidth of 40Hz). This applies the force to a bone sample. Feedback is then provided by a load cell and connected to the ADC feedback channel of the servo board. (For full specs of all mentioned components please refer to the web links which are listed at the end of this email!)
Problem description:
After optimally tuning the PID characteristics and defining the amplitude and pre-load, I can successfully control a continuous, sinusoidally varying force (frequency 1Hz), however when I try to increase the frequency to 10Hz, the amplitude of the output waveform is marginally reduced�i.e. there is attenuation. I know that the bone sample is not viscoelastic enough to act as a low pass filter. The bandwidth of the Voice coil is not a limiting factor either, so�..
How do I extend the bandwidth of this system?
The following Paragraph describes some of the things I have tried, which have had some or no influence. Being a mechanical engineer I would be grateful for any expert advice.
(Note all results have been verified with an oscilloscope where applicable)
Influential Factors:
1) Method of programming.
To generate the wave form a series of points describing one period are written to a circular buffer on the servo board. The points are executed in 10 milli-second intervals and are splined through using a cubic spline algorithm (hence a period described by 100 points gives us a frequency of 1Hz and a 10 point wave gives us 10Hz). All this happens on the servo board in real time. I am confident that although the integrity of the sine wave is reduced at 10 Hz the amplitude is still described within the 10 points and so is not the reason for attenuation. However this does limit the maximum frequency achievable. (I would say the max frequency is about 20Hz)
2) Redefining the resolution of the of the ADC Feedback
The 12 bit ADC feedback channel is scanned at a rate of 50 micro seconds (faster than the loop update rate which is 62.4 micro-seconds). Initially the voltage range was specified at -/+ 10 V giving 20/(2^12) Volts per significant bit, however I noticed that when I increased the resolution to the max possible by changing the range to 0-5 V (giving 5/(2^12) volts per significant bit), the amount of attenuation was reduced, however there was still some attenuation there. This begs another question why would this factor improve the frequency response???
3) PID characteristics
The system gives an optimum step response when using only a pure integral term and setting Kp= 0, Kd= 0. It seems as though the fastest step response is limited to about 6 milli-seconds. The system is fine tuned and any slight increase in the integral term results in immediate instability. Therefore there is no scope to improve the system bandwidth by altering the PID characteristics.
Can you offer me any expert advice?
Considering this information, what would you advise? Do I need a board with a faster loop update rate ?, I have considered using Labview Real Time, which offers a board with a 26 KHz update rate as apposed to the 16Hz (62.4 micro-seconds) provided by the current board). Do I need to use different control algorithms as apposed to PID, if so which ones???
Any help or advice you have to offer would be much appreciated and could help in the battle against osteoporosis. Should you require more information or would like to speak to me send me an email and I can answer any further questions or give you a ring.
Regards Duncan Webster
Email: [email protected]
Product specs:
Servo board:
http://www.ni.com/pdf/products/us/4mo636-637.pdf
Power amp
http://www.ni.com/pdf/products/us/4mo642-643.pdfHi Duncan,
i'm sorry that this answer took this long, but i think a constructive answer which takes a long time is better than a useless answer in a short time....
For the following thought-provoking impulses we have to consider the signal-change when increasing the frequency. The points which describe the signal get streched over the period. Increasing the frequency enlarges the distance between the points.
a) The spline algorithm could be the problem here hence the signal does not correctly pass through the points anymore with increased frequency. Therefor the amplitude decreases with increased frequency. Perharps another kind of spline algorithm can be helpful.
b) Another point can be the control deviation. Since a feedback control system needs a devia
tion for the control, the deviation gets larger when increasing the frequency of the controlled loop. Maybe the control loop has to set the desired value when already getting to a new point. So the signal could get "washy" and the maximum amplitude is reduced.
In this case, the "Velocity Feedforward"-parameter could be of use. This parameter is to use with caution for it can have similar effects like a too high chosen integral term.
c) You can try to set the 7344 to circular contour. Therefor use 2 axis where you use the second axis as dummy (open step). There is a major disadvantage in this setup: since you use 2 axes at the same time, the 7344 can update each axis only with 125 microseconds. But perharps this is sufficient. Either way the parameter of the control loop have to be adapted (integral term reduced).
d) If the 125 microseconds describend in c) is insufficient, you can try to test it with a 7352. The 7352 can handle 2 axis at a time with a update rate of 62.5 microse
conds for each axis.
I hope this answer helps you in solving your rather special issue.
-Norbert
NI Germany
CEO: What exactly is stopping us from doing this?
Expert: Geometry
Marketing Manager: Just ignore it. -
Restricting the bandwidth for particular subnet in ASA 5545
Hello Freinds,
We have ASA 5545 connected to internet Router 3925. We are creating
site to site VPN From Firewall and want to restrict the bandwidth of the users
travelling in the VPN. I know the process for router but not getting the
configuration for firewall as options for policing traffic are not coming under policy-map command in ASA.
Configuration for router:
ip access-list extended 105
permit ip 10.10.10.0 0.0.0.255 any
class-map test
match access-group 105
policy-map test1
class test
police cir 1000000
conform-action transmit
exceed-action drop
violate-action drop
int Gixx
service-policy output test1
Please help me with the equivalent configuration for ASA 5545.In ASA the access list wouldn't take wild card mask, instead it should be subnet mask, hence
access-list capin1 permit ip 10.10.10.0 0.0.0.255 any
access-list capin1 permit ip any 10.10.10.0 0.0.0.255
Access-list cap permit ip any any ---> this is for all other traffic except 10.10.10.0
should be
access-list capin1 permit ip 10.10.10.0 255.255.255.0 any
access-list capin1 permit ip any 10.10.10.0 255.255.255.0
Access-list cap permit ip any any ---> this is for all other traffic except 10.10.10.0 -
How do i calculate the bandwidth of a sound?
The vi provided will require you to firstly input a sound first. there are more vis but this is the one in question? any known techniques to calculate bandwidth of a sound?
thanks
Attachments:
SoundExample_Companding.vi 130 KBmahady wrote:
thank you for your reply, i have an input signal and i am required to find the bandwidth of the sound, is there any functions on block diagram that calculates this or any techniques I can use to find lowest frequency? i know the highest is 5512 since sampling frequency is 11025.
I assume you have a certain sound. Your power spectrum will go from DC (0Hz) to 5512Hz, which is the range of possible frequencies, but certainly not the actual bandwidth of your system.
"Bandwidth is the difference between the upper and lower frequencies in a contiguous set of frequencies", so you need to know the actual frequency range of the sound as well as the sensitivity characteristic of all you components, including e.g. the microphone, amplifier characteristics, and any filters. For example if you microphone only works between 1-2KHz, your bandwidth would be only 1KHz, no matter how fast you sample.
Let's assume that you have an ideal lowpass filter at the nyquist frequency and you don't need to worry about alias frequencies.
So, try to input white noise and look at the power spectrum. get the left and right frequency points where the intensity drops to 3dB lower than the highest peak, take the difference, and you should be almost there. This will give you the bandwidth of your system. The bandwidth of your actual sound might be much less (e.g. if it is the sound of a bird, the lower frquencies might be missing, for example) Good luck!
LabVIEW Champion . Do more with less code and in less time . -
Hi Experts,
Please help me to solve this two issues
I will give you clearly about my client requirement
in the current system (existing) already configured for shift allowance.
shift allowance for executive
Shift Allowance Rates
2 shift
3 shift
RM 240
RM 330
shift allowance for non executive
Shift Allowance Rates
Category 1
Category 2
2 shift
3 shift
2 shift
3 shift
RM 180
RM 280
RM 95
RM 130
they are not maintained (there is no any key) in info type 0014 or info type 0015 they earliest hr consultant copied to the Shift Allowance wage types :- 5533, 5534,5535,5536,5537,5538and 5559
Note : 5533 & 5536 are for Payment.
Other wage types are for calculation purposes only.
And they modified (standard LAP9) YAP9 (copied) schema written pcr for shift allowance
The pcrs are YSH1,YSH2,YSH3,YSH4,YSH5,YSH6,YSH7,YSH8,AND YSHF
1) So my actual my client requirement (Issue 1)
In my client current process shift amount is prorating. Now my client requirement employee change shift (SE20321D) to normal (NSO70012) in the mid of the month
employee will get shift full amount
2) client requirement (Issue 2) Shift Allowance become prorate if the Action (Info type 0000) in the same month have changes. (Depand the action type)
Actions are
WA,WB,WC,WD,WE,WF,WG,WH,WI,WJ,WK,WL,WM,WN,WO,WP
XO,X1,X2,X3,X4,X5,X6,X7,X8,X9.
XA,XB,XC,XD,XE,XF,XG,XH,XI,XJ,XK,XL,XM,XN,XP,XQ,XR,XS,XT,XW,XX,XY,XZ.
Y0,Y1,Y2,Y3,Y4,Y5,Y6,Y7
YA,YB,YC,YD,YE,YF,YG,YH,YI,YJ,YK,YL,YM,YN,YP,YQ,YU,YV,YW,YX,YY,YZ
Z9,ZY
Example
in same month employee changed action on 20.07.2014
Kindly help me to solve this issues feel very happy for your help.and if you need any information about issue please let me know i will share to you.
Thank you
RaamaraoTry this, it works very well for me.
import XMonad.Hooks.ManageHelpers (composeOne, isFullscreen, isDialog, doFullFloat, doCenterFloat)
myManageHook = composeAll. concat $
[ [ className =? c --> doCenterFloat| c <- floats]
, [ resource =? r --> doIgnore | r <- ignore]
, [ resource =? "gecko" --> doF (W.shift "net") ]
, [ isFullscreen --> doFullFloat]
, [ isDialog --> doCenterFloat]]
where floats = ["sdlpal", "MPlayer", "Gimp", "qemu-system-x86_64", "Gnome-typing-monitor", "Vlc", "Dia", "DDMS", "Audacious", "Wine"]
ignore = []
myLayout = tall ||| Mirror tall||| Full ||| tab ||| float
where
tall = named "Tall" $ limitWindows 4 $ minimize $ Tall 1 (3/100) (1/2)
tab = named "Tab" simpleTabbedBottom
float = named "Float" simpleFloat
main = do
myStatusBarPipe <- spawnPipe myBar
conkyBarProc <- spawnPipe conkyBar
trayproc <- spawnPipe myTrayer
xmonad $ ewmh $ withUrgencyHook NoUrgencyHook $ defaultConfig {
terminal = "urxvt"
, manageHook = manageDocks <+> myManageHook <+> manageHook defaultConfig
Last edited by helloworld1 (2012-08-14 05:20:56) -
How can I use applet to get the desktop image of client
hi,I have a question to ask u.
How can I use applet to get the desktop image of client? Now I develop a web application and want user in the client to get his current image of the screen.And then save as a picture of jpeg format ,then upload it to the server?
I have done an application to get the screen image and do upload file to server in a servlet with the http protocal.Since the desktop image is on the client's local hard drive, you'll need to look at trusted applets first.
-
Not able to get the ObjectInputStream in my client across firewall
HI,
I have my application running on Oracle 10g server.I have a servlet which converts a pdf file to stream and writes it to outputstream
// the code in the server is as below
String location = stRealPath + "\\" + pdfloc;
byte[] returnData = null;
returnData = (byte[])pdfGenerateBean.getGeneratedPDFStream(hashData); // this method returns the byte array of the file
outStream.writeObject(returnData);
On my client I have a java class which reads this stream and creates a pdf file
// the client code is as below
InputStream inPdf = msg.sendPostMessage(hashPDF);
ObjectInputStream returnPdf = new ObjectInputStream(inPdf);
inPdf = null;
byte[] pdfStream = (byte[])returnPdf.readObject(); --------getting error here
File f = new File(".");
FileOutputStream out = null;
String loadDirectory = f.getAbsolutePath();
pdfFile = loadDirectory + pdfFilename;
out = new FileOutputStream(pdfFile);
out.write(pdfStream);
out.flush();
out.close();
// this is working fine acroos my network and i am getting the stream on my client outside my firewall.But when a client of mine accesses it from inside his firewall, he is getting this exception.
java.io.EOFException
at java.io.DataInputStream.readFully(Unknown Source)
at java.io.ObjectInputStream.readFully(Unknown Source)
at java.io.DataInputStream.readObject(Unknown Source)
How could the problem be? Is there any setting in the firewall due to which the Stream is not available.Or do i have to send data in any other format.
Thanks in advance
NavinThat's odd because firewalls usually let outbound requests pass through. My last-ditch firewall workaround is to use port 443. Once you have connected, it cannot know what is being transmitted, so it will sometimes let payloads through that are blocked on other ports.
- Saish -
Whats the best way to get a copy of a clients DB onto an internal test DB?
Hi there
We have a client who hosts an Oracle 9i DB in house and we need to get a copy of this DB onto our own servers for testing purposes. What is the best way to go about doing this?
I was reading about the data pump for exporting and importing [http://www.exforsys.com/tutorials/oracle-10g/oracle-10g-using-data-pump-export.html]
Would this meet my requirements and how easy is it to do? Also what type of export would I need to do (there a 5+ schemas using different tablespaces)
Sorry if this is all a bit vague, but i am not a DBA and have been tasked with doing this :(
Thanks in advance,
Toby
edit: sorry i meant a 9i DB
Edited by: redeye on Nov 5, 2009 11:21 AMIf you want to export schemas/objects from 9i db you wouldn't be able to use datapump for exporting them,although you can import the dump file that will be created using the datapump.
Determine what schemas you need at the test(destination) database, and then export them from the source(clients db) database.
Also make sure that on the target database server, os paths where the oracle related files will be created(redo logs,datafiles...) are the same as the ones that are on the source database. -
How to get the dimensions of the selected cell in java client
hi,
I am able to retrieve the value of a particular cell using the data access package.i want to know how can i get the measure and dimension of a particular cell in java client.is it possible to get the row and edge of the selected cell?please help me in this.
thanks and regards
S.Sharanyahi,
I am able to get the value like 'RM00' of the dimension by using the method,
m_activeView.getModel().getDataAccess().getValueQDR(1,1,1).getDimMember(m_activeView.getModel().getDataAccess().getValueQDR(1,1,1).getDimensions().nextElement().toString()));
but this give all the values of the each dimension for each cell of the crosstab.but i want the values of dimension which is selected.i am able to get the selected dimension usind qdr method,for which i am getting the output like
MDM!MEASUREDIMENSION(MDM!D_DEMO1.RESIDUAL_DIM 'RM00', MDM!MEASUREDIMENSION 'MDM!M_DEMO1.PD_BR_RMT_LDRUN_CUBE.PBRL_SIM', MDM!D_DEMO1.PRODUCT_DIM 'G001', MDM!D_DEMO1.LOADRUN_DIM '3', MDM!D_DEMO1.BRANCH_DIM 'HO01')
i want to know the method so that i can get only values ,like RM00,G001,3,H001.is there any method,so that i can get all these value alone.pls help me.i am not able to proceed without this.
thanks
s.sharanya -
I am trying to connect a Windows 7x64 Pro client to a Windows Server 2011 Essentials server. The connector starts fine,then it gives this error: "Your server cannot be located. Enter your server's name or IP address to proceed"
I can ping the server just fine.
So far I have verified
- SSL certificate is the same as the server’s computer name.
- IPV6 is disabled on client
- Manaully Set DNS to 172.16.1.10 ( server Static IP)
Any help would greatly be appreciated.
https://172.16.1.10:65515/Connect
Here are my connector log files:
[03/31/2014 22:00:39 15b8] --------------------------------------------------------------------------------------------------
[03/31/2014 22:00:39 15b8] wmain: Start of Computerconnector
[03/31/2014 22:00:39 15b8] wmain: Calling Computerconnector::ShowWizard()
[03/31/2014 22:00:39 15b8] CComputerconnector::ShowWizard: Initializing common controls
[03/31/2014 22:00:39 15b8] CComputerconnector::ShowWizard: Done initializing common controls
[03/31/2014 22:00:39 15b8] Displaying the wizard
[03/31/2014 22:00:39 15b8] CComputerconnector::ConnecttingDlgProc: IDD_CONNECTING Page Initialization
[03/31/2014 22:00:39 db0] GlobalData::Initialize (172.16.1.10, 65510, C:\Users\tuttle.SGM\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\5LMTU86Q\ComputerConnector(172.16.1.10).exe, 1033)
[03/31/2014 22:00:39 db0] ExpandEnvironmentStrings return (C:\Windows\Temp\Client Deployment Files\)
[03/31/2014 22:00:39 db0] CComputerconnector::Run: Running Task: Id=1 Description=Downloads the Setup.cab file
[03/31/2014 22:00:39 db0] NetworkUtil::DownloadFile (HTTP://172.16.1.10:65510/Connect/default.aspx?Get=Setup.cab&64bit=1&LanguageId=1033, C:\Users\tuttle.SGM\AppData\Local\Temp\Setup.cab)
[03/31/2014 22:00:39 db0] NetworkUtil::DownloadFile - Create directory [C:\Users\tuttle.SGM\AppData\Local\Temp] if not exist.
[03/31/2014 22:00:39 db0] NetworkUtil::_WinInetDownloadFile (HTTP://172.16.1.10:65510/Connect/default.aspx?Get=Setup.cab&64bit=1&LanguageId=1033, C:\Users\tuttle.SGM\AppData\Local\Temp\Setup.cab)
[03/31/2014 22:00:41 db0] InternetOpenUrl (HTTP://172.16.1.10:65510/Connect/default.aspx?Get=Setup.cab&64bit=1&LanguageId=1033) returns 12029
[03/31/2014 22:00:41 db0] _WinInetDownloadFile returns 0x80072efd.
[03/31/2014 22:00:41 db0] NetworkUtil::DownloadFile(HTTP://172.16.1.10:65510/Connect/default.aspx?Get=Setup.cab&64bit=1&LanguageId=1033, C:\Users\tuttle.SGM\AppData\Local\Temp\Setup.cab) failed with hr = 0x80072efd.
[03/31/2014 22:00:41 db0] CComputerconnector::Run: Task: Id=1 Failed
[03/31/2014 22:00:41 15b8] CComputerconnector::ServerDlgProc: IDD_SERVER Page Initialization
[03/31/2014 22:00:52 103c] GlobalData::Initialize (172.16.1.10, 65510, C:\Users\tuttle.SGM\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\5LMTU86Q\ComputerConnector(172.16.1.10).exe, 1033)
[03/31/2014 22:00:52 103c] ExpandEnvironmentStrings return (C:\Windows\Temp\Client Deployment Files\)
[03/31/2014 22:00:52 103c] CComputerconnector::Run: Running Task: Id=1 Description=Downloads the Setup.cab file
[03/31/2014 22:00:52 103c] NetworkUtil::DownloadFile (HTTP://172.16.1.10:65510/Connect/default.aspx?Get=Setup.cab&64bit=1&LanguageId=1033, C:\Users\tuttle.SGM\AppData\Local\Temp\Setup.cab)
[03/31/2014 22:00:52 103c] NetworkUtil::DownloadFile - Create directory [C:\Users\tuttle.SGM\AppData\Local\Temp] if not exist.
[03/31/2014 22:00:52 103c] NetworkUtil::_WinInetDownloadFile (HTTP://172.16.1.10:65510/Connect/default.aspx?Get=Setup.cab&64bit=1&LanguageId=1033, C:\Users\tuttle.SGM\AppData\Local\Temp\Setup.cab)
[03/31/2014 22:00:54 103c] InternetOpenUrl (HTTP://172.16.1.10:65510/Connect/default.aspx?Get=Setup.cab&64bit=1&LanguageId=1033) returns 12029
[03/31/2014 22:00:54 103c] _WinInetDownloadFile returns 0x80072efd.
[03/31/2014 22:00:54 103c] NetworkUtil::DownloadFile(HTTP://172.16.1.10:65510/Connect/default.aspx?Get=Setup.cab&64bit=1&LanguageId=1033, C:\Users\tuttle.SGM\AppData\Local\Temp\Setup.cab) failed with hr = 0x80072efd.
[03/31/2014 22:00:54 103c] CComputerconnector::Run: Task: Id=1 Failed
[03/31/2014 22:00:55 15b8] wmain: End of Computerconnector: hr=0x0Please run this script on your server, it should help to diagnose any issues with IIS.
http://gallery.technet.microsoft.com/Windows-Server-Essentials-556159c3
You will need to set your PowerShell execution policy to remotesigned.
http://technet.microsoft.com/en-us/library/ee176961.aspx
Usually this error is due to an SSL Cert not being assigned to the 'WSS Certificate Service Web Site'
Robert Pearman SBS MVP
itauthority.co.uk |
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Hi,
How can I catch the WAN IP of my client computers?? The clients are behind a router and I don't wanna put the code on the client side. I wanna do it using Java Web Service Call.
Any idea how to go about..?Are you writing a client application that will detect
it's internet gateway address from within an
intranet? Or is the application a server that
receives client connections?The application is a server which will receive client connections and I need to get the WAN/External IP using Java Web Services. How do I go about it?? I'm not aware of it!!
Any help appreciated. -
How to get the IP of the client when TCP connect in the server
How to get the IP of the client when TCP connect in the server.
The only parameter got from the connection is connectionID.
Solved!
Go to Solution.I guess you're using "TCP Wait on Listener" on the server. This returns the remote address and port (as optional outputs).
-
I just upgraded to an 5s. in the switch i am no longer able to get any texts from my client and all of my daughter's texs come only as email to my outlook instead of text. What do I need to switch in my settings?
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the page that opens.
Make sure the title of the Console window is All Messages. If it isn't, select All Messages from the SYSTEM LOG QUERIES menu on the left.
Click the Clear Display icon in the toolbar. Try the action that you're having trouble with again. Post any messages that appear in the Console window – the text, please, not a screenshot.
Important: Some private information, such as your name, may appear in the log. Edit it out by search-and-replace in a text editor before posting.
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