A faster alternative to an AT MIO 16 DE10?

I am currently using an AT MIO 16 DE 10 DAQ card I am using 24 digital and 8
analog channels and the two GPCTRs. This card will go up to 100ksamples/s.
This sample rate is divided between the number of channels I use for an
acquisition. I want to use all 16 analog inputs in this card. Is there a
functionally equivalent card that will give faster sample rates?
If the events I am sampling have a frequency of 5kHz am I right to assume I
need at least to sample at 10kHz per channel? This means I need a card that
will sample at least at 160ksamples/s? Would I be better of oversampling 4
times? Is there a formula to determine optimum sampling rate?
Does multiplexing mean that if I sample each channel at 1000 samples
per
second by the time I read channel 15 I will be reading it 16 ms after I read
channel 0? Is there a way around this delay?
Thanks
Luis

Nyquist theorem says that you have to sample at least 2x the frequency of the incoming signal to prevent aliasing. However, if you aren't just trying to avoid aliasing, but also want an accurate representation of the waveform, you must sample at MUCH higher than that. There isn't an equation for that, it just depends on the input signal and what shape it is. Usually for normal waveforms like sinusoidal, 10 times over sampling is recommended.
As for multiplexing, it depends on your board. For the one you have, yes, if you read 15 channels at 1000 S/s then the board is running at 15 kHz and channel 15 is read roughly 1 ms away in time fom channel 1. If you need simultaneous sampling, NI provides simultaneous sampling DAQ boards(6110E, 6111E) and a connector bl
ock to do simultaneous sample & hold (SC-2040).
As for recommending hardware, it sounds like you will need to go to two cards. NI doesn't have a faster MIO board that has 24 digital lines. You can get a 24 line DIO board (6503) really cheap though. Then for your MIO board, it will depend on if you need simultaneous sampling. The 6110E has simultaneous sampling and is really fast (5MS/s), so it would probably be best.
In the future, you should submit your questions like this to the Measurement Devices->Multifunction I/O section of Developer's Exchange instead, or call National Instruments so our sales representatives can help you with your hardware selection.
Best Regards,
Chris Matthews
Measurement Studio Support Manager

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Faster Alternatives to Bridge CC

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This is a late reply but hopefully it might help you or someone else.
For those who don't want to read my mammoth post this is the condensed version:
Bridge/Lightroom = good but painfully slow.
Alternatives for PC:
ACDSee Pro ( I use Pro 6.0)
Faststone - Free and fast.
Alternatives for Mac:
ACDSee Pro ( I use 2.0)
Xee - Free and fast, but few features
On to the full version.
First, my experience with Bridge/Lightroom then further down my solution:
Bridge/lightroom both have good file management tools and lots of other features but as you've discovered they are slow.
I've used Lightroom (sparingly) since 3.0 up to 5.0. Only reason I have the latest version now is because i'm subscribing to Adobe CC and I hoped for some improvements regarding speed and workflow but was disappointed. Still slow image to image rendering and still no way to simply browse files without importing them. (or have I missed something?)
Main thing is still that it's slow.
Bridge has been around for a long time now and I've tried using it since my first version which shipped with Adobe Master Collection CS3. I've jumped on every single update Adobe has thrown at it but it is still painfully slow when browsing/viewing images and forget about selecting images based on sharpness as it simply cannot handle proper scaling to screen size on the fly. It has to create preview files first, which I have still not managed to set up in spite of an excess of 100 hours research/re-install/cache purging/mucking with settings etc..
My experience tells me that the only way to accurately gauge focus in Bridge is to zoom in 100%, something that also takes extra time especially with raw files.
I really want to love Bridge since that would mean my Adobe CC subscription would handle everything I need, but no, I simply cannot get around the fact that Bridge is too slow to be efficient.
For the record my systems are not slow, the specs are:
PC:
QuadCore i7 2.8GHz
12GB RAM
120GB SSD system drive
Seagate 3TB 7200rpm photo drives
Eizo 24" flat monitor (don't have the model nr right now but it's a S-PVA panel with good colors)
Mac:
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16 GB Ram
256GB SSD
3:rd party solutions I use/used that you might give a try:
My first choice is ACDSEE - I currently own ACDSEE Pro 6.0 for PC and 2.0 for Mac. I mainly use it to go through my memory cards during import and for that it is MILES AHEAD Lightroom/Bridge.
There is a decent Categories feature that I sometimes use to keep track of where certain types of images are. For example I've created sets of categories for different clients to keep track of my best images for each client.
I usually go through my memory cards and simply hit CTRL+B to save to save selected photos into the image basket, this gives me a virtual selection that I can choose to copy elsewhere or perhaps open in Photoshop straight from the memory card.
It also serves as a blazing fast image viewer, it handles most image formats including jpg/png/gif/psd etc. Best of all, it's REALLY FAST compared to Lightroom and Bridge. It even handles quite big .PSD's however the bigger they get the longer it takes obviously.
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I've used ACDSee on the PC about 7 years, it's been really buggy at times, most notably known for "ragequitting" on you while browsing images but the last 3 versions or so have behaved really well. I have still experienced errors forcing me to shut it down but it is now a rare problem and I prefer that risk over the inexcusable slow Bridge/Lightroom. Pro 2.0 is my first experience with it on Mac and it still needs some tweaks but some of my gripes are partly related to getting used to the Mac interface.
Free alternatives that I've used and recommend:
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Ok, I think I've done my share of typing today, I hope someone finds this information useful.
If you read this Adobe; C'mon... shape up Bridge and Lightroom already, you've had many years to get it right but alot of users still see poor performance in those otherwise great programs.

Faster alternative to Math.random()?

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user11253970 wrote:
I want to check whether empno=1234 exists in emp table
Is there any better way to do the same.?http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1525380674899
select count(*)
from dual
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http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1525380674899#34907832120350
Just process the data and take appropriate action if nothing was processed.

Faster alternatives to iPhoto?

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Alec

Alec:
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Do you Twango?
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Hello experts,
I am wondering if theres a better and faster alternative than declaring a header line for an itab. are work areas faster?
What is the use of logical database? can you please give me an example on how to use it in reports.
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I always use this...It uses header lines, but at least is smaller -:)
<b>DATA: BEGIN OF MY_TAB TYPE STANDARD TABLE OF BKPF WITH HEADER LINE.</b>
For logical databases, you can check my blog...I always use LDB for HR programs -:)
<a href="/people/alvaro.tejadagalindo/blog/2006/02/19/how-to-deal-with-hr-payroll-reports:///people/alvaro.tejadagalindo/blog/2006/02/19/how-to-deal-with-hr-payroll-reports
LDB's provides a lot of information, because they gather it from a lot of different tables...
A Field-Symbols is like a pointer in C++, like an alias for a variable...Here's a small example...
REPORT Z_ATG_DUMMY.
FIELD-SYMBOLS: <F1>, <F2> TYPE I.
DATA: TEXT(20) TYPE C VALUE 'Hello, how are you?',
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ASSIGN TEXT TO <F1>.
ASSIGN NUM TO <F2>.
DESCRIBE FIELD <F1> LENGTH <F2>.
TEXT = 'CHAU'.
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WRITE: / TEXT, 'has length', NUM.
ASSIGN LINE1 TO <F1>.
ASSIGN LINE2-COL2 TO <F2>.
MOVE <F1> TO LINE2.
ASSIGN 'LINE2-COL2 =' TO <F1>.
I just can't install SAPNWSP...I only got MiniSap...But I got all the development enviorment...Don't know about the User-Exits...Actually I don't think so...Because those "mini" systems doesn't come with any functional module.
Greetings,
Blag.

Dwb is dead - What's your alternative?

According to the wiki:
https://wiki.archlinux.org/index.php/Dwb
As of this October 2014, dwb is no longer being maintained. Does anyone have any suggestions on a fast alternative minimal browser that navigates through keybindings?
Last edited by cynicalpsycho (2014-11-02 15:09:49)

I just switched to surf
I really like the way you can extend the browser through simple shell scripts that manipulate dmenu (bookmarking, smart-searching...).
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Last edited by captaincurrie (2014-11-02 18:00:35)

What is WRONG with my MAC G5?

Hi all,
I've posted several times in various forums about a number of problems I've been having that remain unresolved, and would like to appeal once more for help. I have a 6 year old 2GHz PowerPC G5 (2004) with 4GB of RAM, running FCS 6.0.6 and OS 10.5.8. I must reiterate that, despite the computer's age, it was working just fine until a kernel panic in December that has since left the computer feeling sluggish. I've performed a clean install (twice) of both the OS and FCS. I've bought new RAM and reseated in every possible way. I bought a new external harddrive (used to store my media) in case that was the culprit. I even took the computer and display into an Apple Store where they tested it for 2 days finding "nothing wrong with it". Yet even they couldn't get the "High" quality setting back in FCP. It defaults to medium now (unlike before) - which is my biggest concern. The computer's internal drive has 30% free space. The external more than 15%. And naturally, I've repaired permissions and trashed pref files, etc., with no results. Oh! And I've run the Hardware Diagnostics disk, three times, and everything keeps passing. I also just cloned the internal Maxtor drive onto an external Lacie drive and booted up from that - with no obvious improvement. Trying to eliminate the hard drive as a factor.
One more symptom -- perhaps related, perhaps not -- is that I can no longer put the computer to sleep without it crashing, followed by jet engine fans coming on. This happens every single time. Unfortunately it wasn't happening (as frequently) when I took the computer to the Apple geniuses.
And last week, when I turned the computer on, the screen remained black. The LED flashed in what I think was a series of three fast flashes. I rebooted and everything has been fine since (with the display).
I think I've found some suspicious items in the console logs. But I don't have a clue how to accurately read them or fix the problem. Can someone please help me?
The windowserver_last.log is full of the following:
May 21 10:57:47 52 kCGErrorIllegalArgument: CGXGetWindowWorkspace: invalid window id: a2
May 21 10:58:33 52 kCGErrorFailure: CGXDisableUpdate: UI updates were forcibly disabled by application "Final Cut Pro" for over 1 second. Server has re-enabled them.
May 21 10:59:42 52 kCGErrorFailure: CGXDisableUpdate: UI updates were forcibly disabled by application "Final Cut Pro" for over 1 second. Server has re-enabled them.
May 21 11:03:52 52 kCGErrorFailure: CGXDisableUpdate: UI updates were forcibly disabled by application "Final Cut Pro" for over 1 second. Server has re-enabled them.
Then there's these ones that keep popping up in the console or system logs:
24/05/10 1:47:43 PM /Applications/Final Cut Pro.app/Contents/MacOS/Final Cut Pro115 _RemoveTimeTask(), the current time manager task 0x416c943c being removed is also currently executing its tmAddr routine, so unexpected things may result ( Radar #4555679 ).
24/05/10 1:48:39 PM Final Cut Pro115 startDelayedNoDataDetection
(the startdelayed... is probably due to dropped frames during capture with stop/start detection on)
These ones are less frequent, but still showing up:
22/05/10 6:30:17 PM Dock104 QL ERROR Generator database update takes too long... we will use what we currently have
May 17 16:22:07 macdaddys-power-mac-g5 Finder100: QL ERROR Generator database update takes too long... we will use what we currently have
May 18 08:56:18 macdaddys-power-mac-g5 Finder96: QL ERROR Generator database update takes too long... we will use what we currently have
May 18 13:03:07 macdaddys-power-mac-g5 Finder101: QL ERROR Generator database update takes too long... we will use what we currently have
May 19 11:47:56 macdaddys-power-mac-g5 Finder112: QL ERROR Generator database update takes too long... we will use what we currently have
May 19 14:31:15 macdaddys-power-mac-g5 /System/Library/CoreServices/Finder.app/Contents/MacOS/Finder118: StatusMonitor::volumesChangedCallBack returned -47
May 19 15:23:14 macdaddys-power-mac-g5 Finder102: QL ERROR Generator database update takes too long... we will use what we currently have
May 21 09:54:32 macdaddys-power-mac-g5 Finder102: QL ERROR Generator database update takes too long... we will use what we currently have
May 21 14:28:45 macdaddys-power-mac-g5 Finder111: QL ERROR Generator database update takes too long... we will use what we currently have
22/05/10 6:30:31 PM quicklookd123 QL ERROR 'Creating thumbnail' timed out for ''
23/05/10 2:27:25 PM com.apple.launchd[1] (com.apple.aslmanager) Throttling respawn: Will start in 3 seconds
23/05/10 2:27:28 PM com.apple.quicklook109 invalid #-escape sequence.
23/05/10 2:27:28 PM com.apple.quicklook109 encountered unexpected object type: 7.
23/05/10 2:27:29 PM com.apple.launchd78 (0x0-0xd00d.com.apple.AddressBook.abd112) Check-in of Mach service failed. PID 112 is not privileged: com.apple.AddressBook.abd
23/05/10 2:27:29 PM com.apple.quicklook109 xref table size mismatch: calculated 462; /Size = 463.
===============
If I had the money, of course I'd buy another computer. But I don't. And deep inside, I still believe there's a fix. Am I right or wrong???
Chris
P.S.
I don't have a clue how to read Power Fractal (suggested to someone else in another post), but here's my score:
Elapsed time: 1.6 seconds
Achieving 6261.1 Megaflops
Color Speed: 10
Maximum Count: 4096
One more thing I gleaned from another post are similar istat readings that seemed unusual to that person. Backside fans: 51rpm. ???

First thing I would do is make your post clear(-er) (I find it easier to break things down into one item per paragraph or into lists); and what HARDWARE tests and steps you have tried - that we tend to repeat over and over with system failures.
I've posted several times in various forums about a number of problems I've been having that remain unresolved,
*I have a 6 year old 2GHz PowerPC G5 (2004) with 4GB of RAM, running FCS 6.0.6 and OS 10.5.8.*
I must reiterate that, despite the computer's age...
+*it was working just fine until a kernel panic in December that has since left the computer feeling sluggish.*+
+I've performed a clean install (twice) of both the OS and FCS.+
+I've bought new RAM and reseated in every possible way.+
+I bought a new external hard drive (used to store my media) in case that was the culprit.+
+I even took the computer and display into an Apple Store where they tested it for 2 days finding "nothing wrong with it". Yet even they couldn't get the "High" quality setting back in FCP. It defaults to medium now (unlike before) - which is my biggest concern.+
+The computer's internal drive has 30% free space.+
+The external more than 15%.+ 15% is still low and can be highly fragmented, but not germaine to hardware problems.
+I've run the Hardware Diagnostics disk, three times, and everything keeps passing.+
+I also just cloned the internal Maxtor drive onto an external Lacie drive and booted up from that - with no obvious improvement.+
+Trying to eliminate the hard drive as a factor.+
I'd even say LaCie might just be one more layer of possible problems.
There are FAQs on kernel panics which:
A/ Been there, done that?
B/ Do they need to be listed (again)? revisited?
C/ panics are hardware almost always, RAM, controllers, sometimes drivers, even corrupt NVRAM
Does it boot into Open Firmware?
If yes, redo reset-nvram
If no, DOA
G5 Logicboards:
http://www.dvwarehouse.com/Power-Mac-G5-Logic-Boards-c-24553701074.html
Power Mac G5 PowerMac G5 Dual 2.0Ghz M9032LL/A, A1047 1969C
NOTE: Power Mac G5 Thermal Calibration Service It is vital for all Power Mac G5 to run thermal calibration after fitting a new logic board or processors, without it, Temperature Control will not be able to detect the system temperture correctly. As a result, it could cause the cooling fans to run at high speed, eventually damgaging the logic board or processors.
Lastly, I would never run a Mac w/o UPS, which can lengthen life and protect equipment and even the PSU.
And for $1500 the iMac Apple Store Specials can be a good fast alternative to G5.
http://store.apple.com/us/browse/home/specialdeals/mac/imac

I need to transfer files from a PowerMac G4 to a PowerMac G5, how do I get both computers to read MY Passport drive?

I have formatted the My Passport drive as a MS-DOS (FAT) but the G4 which is running on Mac OS 10.2.8 can not see the drive on the desktop. The G5 (Mac OS 10.6.8) has no problem reading the drive. I have about 7 GB of data that I need to transfer from the G4 to the G5. How do I format the My Passport drive so that both computers can read the drive? Is it possible?

A faster alternative is to connect the macs with a firewire cable and use Target Disk Mode. No external drive needed.
http://support.apple.com/kb/ht1661

Adobe AIR installation fails

Scenario
Attempting to install the Adobe AIR runtime (or any AIR apps requiring it) on Snow Leopard (possibly earlier versions of OS X also).
Symptom
AIR installation will hang prior to completion on primary user account, however, AIR will successfully install on a newly created OS X admin user. AIR applications will not install on primary user account either. Disk has no errors, filesystem is healthy. All file/folder owners and permissions are as expected. Adobe troubleshooting knowledgebase article does not resolve issue, Adobe recommends reinstallation of OS X(!). All '.plist' files appear to be uncorrupt (e.g., by running Preferential Treatment).
Cause
There is an unidentified conflict between a preference file in your primary user account Preferences folder and the files installed by the AIR runtime. The resolution below involves less inconvenience than an OS reinstallation.
Resolution
1. Logon to the primary user account and create a new folder on your desktop named (for example) 'Library-Preferences'.
2. Open Terminal.app and enable hidden folder visibility by entering 'defaults write com.apple.finder AppleShowAllFiles TRUE'
3. Restart Finder by pressing Command-Option-Escape then selecting Finder and clicking 'Relaunch.'
4. In Finder, browse to User>Library>Preferences folder.
5. Select all files in the Preferences folder (a couple hundred or more files is typical).
6. Move (Command-Drag) all the .plist and other files to 'Library-Preferences' that you created on your desktop. If the move fails because some hidden files will not move, deselect just those files and move the rest. Don't worry about the few that want to stay put, as they are not suspect for the conflict causing the AIR installer issue.)
NOTE: It is VERY important that 'Library-Preferences' NOT be deleted.
7. Try reinstalling AIR. It should succeed this time.
8. If it succeeds, try installing an AIR app (e.g., Tweetdeck). If it installs successfully, the conflicting file now exists in your 'Library-Preferences' folder and will not conflict with AIR.
9. Hide the hidden files again by entering 'defaults write com.apple.finder AppleShowAllFiles FALSE' in Terminal and relaunch Finder (see step 3).
10. Move your .plist and other property files as needed back to your /'User/Library/Preferences/' folder as needed (you know you will need them because your Mac will have 'forgotten' your application settings and preferences when you run an application.
Tip: if your application is 'Acme UltraWidgets 2') do a search on 'acme' and 'ultrawidgets' in the Finder and drag all the found files back to 'Preferences'.)
11. When prompted, overwrite any .plist (or other) files in the 'Preferences' folder when moving these files back to their original location to replace the default .plist files recreated by OS X or your applications.
Over time, you will drag back many of your Preferences files to their proper spot, but you will also have many files remaining. These will be from applications that you seldom use or orphan files left over from deleted applications. If any application, tool or utility seems to not be functioning right, don't forget to search for its associated .plist (and other) files in the 'Library-Preferences' folder.
A faster alternative is to move all non-Adobe .plist (and other) files back to 'Preferences' and try reinstalling AIR. If it fails, that proves a conflict with another Adobe application on the system. I have not tested this.
If anyone happens to find *+specific files+* that conflict with AIR by a refinement of this method, please post back to this forum.

ignore

Essbase Studio Performance Issue : Data load into BSO cube

Hello,
Having succesfully built my outline by member loading through Essbase Studio, I have tried to load data into my application again with Studio. However I was never able to complete the data load because it is taking forever. Each time I tried to work with Studio in streaming mode (hoping to increase the query speed), the load gets terminated due to the following error : Socket read timed out.
In the Studio properties file, I typed in, oracle.jdbc.ReadTimeout=1000000000, but the result has not changed. Even if it did work out, I am also not sure the streaming mode is gonna provide a much faster alternative to working in non-streaming mode. What I'd like to know is, which Essbase settings I can change (either in Essbase or Studio server) in order to speed up my data load. I am loading into a Block Storage database with 3 Dense, 8 Sparse and 2 attribute dimensions. I filtered some dimensions and tried to load data to see exactly how long it takes to create a certain number of blocks. With ODBC setting in Essbase Studio, it took me 2.15 hours to load data into my application where only 153 blocks were created with the block size of 24B. Assuming that in my real application the number of Blocks created are going to be at least 1000 times more than this , I need to make some changes in settings. I am transferring the data from Oracle Database, with 5 tables joined to a fact table (view) from the same data source. All the cache settings in Essbase are in default mode. Would changing cache settings, buffer size or multiple threads help to increase the performance? Or what would you suggest that I should do?
Thank you very much.

Hello user13695196 ,
(sorry I no longer remember my system number here)
Before it comes to any optimisation attemps in the essbase (also Studio) environment you should definitily make clear that your source data query performs well at the oracle db.
I would recommand:
1. to create in your db source schema a View from your sql statement (these behind your data load rule)
2. query against this view with any GUI (Sql Developer, TOAD etc.) to fetch all rows and measure the time it takes to complete. Also count the effected (returned) number of rows for your information and for future comparing of results.
If your query runs longer then you think is acceptable then
a) check DB statistiks,
b) check and/or consider creating indexes
c) if you are unsure then kindliy ask your DBA for help. Usually they can help you very fast.
(Don't be shy - a DBa is a human being like you and me :-) )
Only when your sql runs fast (enough for you; or your DBA says is the best you can achieve) at the database move your effort over to essbase.
One hint in addition:
We had often problems when using views for dataload (not only performance but rather other strange behavior) . Thats the reaons why I like more directly to set up on (persistence) tables.
Just to keep in mind: If nothing helps create a table from your view and then query your data from this table for your essbase data load. Normaly however this should be your last option.
Best Regards
(also to you Torben :-) )
Andre
Edited by: andreml on Mar 17, 2012 4:31 AM

Finding the centroid of a polyline

Hi.
I am trying to write a function that will return the centroid of an input polyline. I have come up with two possible solutions, but both are problematic in different ways...
This first function returns an error:
ORA-00600: internal error code
Our DBA is looking in to this, but so far with no success
The second function seems to work ok, but is very slow. It takes over half an hour to process the first 10,000 records in my table (there are 270,000 in all)
Any suggestions as to what the problem might be with the first function, or how to speed up the second?
Thanks!
1
create or replace function get_line_centroid(geoloc MDSYS.SDO_GEOMETRY) return MDSYS.SDO_GEOMETRY
as
mbr MDSYS.SDO_GEOMETRY;
centroid MDSYS.SDO_GEOMETRY;
begin
mbr := MDSYS.SDO_GEOM.SDO_MBR(geoloc);
If SDO_GEOM.VALIDATE_GEOMETRY_WITH_CONTEXT(mbr, 0.05) = 'TRUE' Then
centroid := MDSYS.SDO_GEOM.SDO_CENTROID(mbr, 0.05);
End If;
return centroid;
end;
2
create or replace function get_line_centroid(geoloc MDSYS.SDO_GEOMETRY) return MDSYS.SDO_GEOMETRY
as
lrs_seg MDSYS.SDO_GEOMETRY;
centroid MDSYS.SDO_GEOMETRY;
begin
lrs_seg := SDO_LRS.CONVERT_TO_LRS_GEOM(geoloc);
centroid := SDO_LRS.LOCATE_PT(lrs_seg, SDO_LRS.PERCENTAGE_TO_MEASURE(lrs_seg, 50));
return SDO_LRS.CONVERT_TO_STD_GEOM(centroid);
end;

Hi All.
Well I have still not figured why my first function was failing, but I have discovered a much faster alternative to the second one...
This is to perform a manual computation of the centroid using the coordinates in the ordinate array of the line.
Quite straight forward :)

A faster alternative to an AT MIO 16 DE10?

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