08 July 2009
07 July 2009
GPS Surveying by Stephens Environmental Consulting, Inc.
"In Real Time Kinematic (RTK) GPS, the positional data are displayed and recorded immediately. Subcentimeter to millimeter level accuracies (both horizontal and vertical) are obtainable"
Trimble 5800 RTK System - Technical Specifications
Cites performance in RTK mode as:
Horizontal : ±10 mm +1 ppm RMS
Vertical : ±20 mm +1 ppm RMS
Determining Your GPS Needs
Static surveying, 45 - 60 minutes, + .5 mm + 1 ppm.Kinematic surveying, 5 - 30 seconds, + 1 cm + 1 ppm.
Sect_5.5.5 - Kinematic GPS Surveying Techniques
Very brief intorduction to Kinematic GPS for "Centimetre positioning accuracy of moving antenna ..."
Surveying - Traverse Calculations
Powerpoint presentation on Traverse surveying.Good reference to the Bowditch Rule.
With worked examples.
The error in latitude (departure) of a line is tothe total error in latitude
(departure) as thelength of the line is the perimeter of the traverse
With worked examples.
Gerald Mahun - Traverses - 2006
Powerpoint presentation on Traverse surveys.
Introduces closed loop, closed link, and open link surveys.
Specifically focusses on error analysis.
HTML onChange - HTML Code Tutorial
onChange designates a JavaScript to run when the user chooses one of the options. This means that an action is initiated immediately when the user chooses an item, not when a "submit" button is pressed.
A popular use for onChange is to make the <> list a set of hyperlinks. This allows you to display many links in a very compact space
A popular use for onChange is to make the <> list a set of hyperlinks. This allows you to display many links in a very compact space
04 July 2009
HTMLEditorKit is throwing exception
When you provide a Reader to HTMLEditorKit to retrieve an HTML page,
you're giving it a character stream that isn't encoded at all. If it
encounters a meta tag in the HTML source that tries to change the
encoding, it will therefore throw an exception, because it has no way to
honor that request.
You can set a property on the document to tell it to ignore this. The
code looks like this:
doc.putProperty("IgnoreCharsetDirective", new Boolean(true));
03 July 2009
30 June 2009
What Is Terracotta
What Is Terracotta:
"Terracotta is open source infrastructure software that makes it inexpensive and easy to scale a Java application to as many computers as needed, without the usual custom application code and databases used to share data in a cluster."
"Terracotta is open source infrastructure software that makes it inexpensive and easy to scale a Java application to as many computers as needed, without the usual custom application code and databases used to share data in a cluster."
27 June 2009
RF Engines - Mixed Radix Dual-speed FFT Product Specification
Combining non-radix-2 DFT cores to form non-binary FFT engines.
Fast Fourier Transform (FFT)
Fast Fourier Transform (FFT)
Includes some goode illustrations of Radix-2 and Radix-4 butterfly nodes.
Includes some goode illustrations of Radix-2 and Radix-4 butterfly nodes.
The Design and Implementation of FFTW3
FFTW is an implementation of the discrete Fourier
transform (DFT) that
adapts to the hardware in order to
maximize performance.
Basic Sub-Nyquist Sampling | Comp.DSP | DSPRelated.com
Basic Sub-Nyquist Sampling Comp.DSP DSPRelated.com:
Although bandpass sampling works, the jitter requirement on the samplesand
the timing of the sample aperture are as stringent as on a full-ratesampler.
Not all slow ADCs can meet these specs. Moreover, not allcombinations of
sample rate and band-edge location are possible, even ifthe Nyquist
criterion is met.This is explained and diagrammed in detailin Richard G. Lyons' book,
"Understanding Digital Signal Processing."
25 June 2009
Cooley and Tukey, An Algorithm for the machine calculation of complex fourier series
Cooley and Tukey, An Algorithm for the machine calculation of complex fourier series
Scanned copies of the original Cooley & Tukey FFT paper, placed online by Charles Chiu
Scanned copies of the original Cooley & Tukey FFT paper, placed online by Charles Chiu
18 April 2009
Javanotes 5.0, Section 12.1 -- Images and Resources
Javanotes 5.0, Section 12.1 -- Images and Resources: "Images and BufferedImages"
Talks about drawing to 'off-screen canvas'.
Talks about drawing to 'off-screen canvas'.
06 April 2009
16 January 2009
Online Book Shop Ecommerce Website Templates
Online Book Shop Ecommerce Website Templates: "Ready-made book store website which includes product catalogs, create account, shopping cart, checkout, view order status, account history, search products, best sellers, specials, what's new, product reviews, newsletter, tell a friend, banner management statistics, and more."
osCommerce, Open Source Online Shop E-Commerce Solutions
osCommerce, Open Source Online Shop E-Commerce Solutions: "osCommerce has attracted a large growing e-commerce community that consists of over 200,200 store owners and developers who support each other and extend osCommerce Online Merchant with add-ons being contributed on a daily basis. To date there are over 5,200 add-ons that are available for free to customize osCommerce Online Merchant online stores and to help increase sales."
Online Bookstore Web Appplication - Free Open Source Code in ASP, PHP, JSP, Perl, ColdFusion, ASP.NET / C#
26 November 2008
15 September 2008
14 September 2008
Fred Stluka's home page
Fred Stluka's home page: "Fred Stluka's links page -- High on content -- Low on frills"
07 September 2008
Converting normal time to Epoch time format using excel :: MrExcel Message Board
Converting normal time to Epoch time format using excel :: MrExcel Message Board: "The formula :- =(A1/86400)+25569 where A1 contains the UNIX time should convert to Excel date/time"
30 August 2008
27 August 2008
17 August 2008
Euler Angles -- from Wolfram MathWorld
Euler Angles -- from Wolfram MathWorld: "According to Euler's rotation theorem, any rotation may be described using three angles"
08 August 2008
Return a Structure Object from C to Java Through JNI (Other Java APIs forum at JavaRanch)
Return a Structure Object from C to Java Through JNI (Other Java APIs forum at JavaRanch): "Here's a little code to show how an object can be created using JNI"
07 August 2008
31 July 2008
Building and Consuming Web Services using Delphi and .NET
Building and Consuming Web Services using Delphi and .NET: "Abstract: The session demonstrates how to create and consume Web Services in Delphi using the Microsoft .NET Framework."
30 July 2008
Leveraging gSOAP for Legacy Systems Integration
Leveraging gSOAP for Legacy Systems Integration: "Leveraging gSOAP for Legacy Systems Integration"
21 July 2008
17 June 2008
mod_authnz_ldap - Apache HTTP Server
mod_authnz_ldap - Apache HTTP Server
Includes settings relating to Active Directory
Includes settings relating to Active Directory
AuthLDAPBindDN apache@example.com
AuthLDAPBindPassword password
AuthLDAPURL ldap://10.0.0.1:3268/?userPrincipalName?sub
14 May 2008
22 March 2008
15 March 2008
03 March 2008
Making Apache SOAP Invocations using SMTP
Making Apache SOAP Invocations using SMTP: "Making Apache SOAP Invocations using SMTP"
02 March 2008
developerWorks : Web services : Downloads and products
developerWorks : Web services : Downloads and products
Links to many products supporting SOA web services.
Links to many products supporting SOA web services.
27 February 2008
seekda.com - on-demand usage of services over the Web
seekda.com - on-demand usage of services over the Web
This site represents a search engine resource for SOAP web services.
It uses Robot techniques to probe for possible web services and instigates an availability test.
This site represents a search engine resource for SOAP web services.
It uses Robot techniques to probe for possible web services and instigates an availability test.
16 February 2008
Sharp and Tappin Tech Ltd, Performance Engineering,Mechanical and Electronic Engineering Solutions
Sharp and Tappin Tech Ltd, Performance Engineering,Mechanical and Electronic Engineering Solutions
Manufactures a picoITX case design. Both for disk and diskless based designs.
Manufactures a picoITX case design. Both for disk and diskless based designs.
23 January 2008
18 January 2008
Java 1.5
Java 1.5
Describes some of the syntax enhancements introduced with Java 1.5.
e.g. for (Object o : Collection
Describes some of the syntax enhancements introduced with Java 1.5.
e.g. for (Object o : Collection
23 December 2007
Crash, Boom: Too Many Open Files…
Crash, Boom: Too Many Open Files…:
public class ProcDemo {
public static void main(String[] args) throws
InterruptedException, IOException {
Process proc = null;
try {
ProcessBuilder pb = new ProcessBuilder(args);
proc = pb.start();
proc.waitFor();
} finally {
if
(proc != null) {
close(proc.getOutputStream());
close(proc.getInputStream());
close(proc.getErrorStream());
proc.destroy();
}
}
}
private static void close(Closeable c) {
if (c != null) {
try
{
c.close();
} catch
(IOException e) {
// ignored
}
}
}
}
Another reference to handling Too Many Files errors due to spawned processes. Includes example code for cleanly closing all open streams.
public class ProcDemo {
public static void main(String[] args) throws
InterruptedException, IOException {
Process proc = null;
try {
ProcessBuilder pb = new ProcessBuilder(args);
proc = pb.start();
proc.waitFor();
} finally {
if
(proc != null) {
close(proc.getOutputStream());
close(proc.getInputStream());
close(proc.getErrorStream());
proc.destroy();
}
}
}
private static void close(Closeable c) {
if (c != null) {
try
{
c.close();
} catch
(IOException e) {
// ignored
}
}
}
}
Another reference to handling Too Many Files errors due to spawned processes. Includes example code for cleanly closing all open streams.
david@linsin.de: Java's Runtime.exec() openes too many files
http://dlinsin.blogspot.com/2007/02/javas-runtimeexec-openes-too-many-files.html
This reference suggests using Process.destroy() to resolve the open streams problem.
This reference suggests using Process.destroy() to resolve the open streams problem.
- Java problem -- Too many open files
- Java problem -- Too many open files: "My program uses the Runtime.getProcess() method to get a process and then exec() an external script. What I didn't know was that the API automatically opens three streams (stdout, stderr, stdin) each time the getProcess() is called. It is the responsibility of the caller to close those streams when done."
17 November 2007
23 September 2007
22 August 2007
28 June 2007
22 June 2007
05 June 2007
02 June 2007
The new Internet Explorer first run screen - Spyware Sucks
The new Internet Explorer first run screen - Spyware Sucks
Solved James' IE7 startup problem.
Needed to disable the Antiphishing filter!
# re: The new Internet Explorer first run screen
Monday, December 11, 2006 5:41 AM by Dave R
I have solved this problem by applying the following setting with GPEDIT.
1. Start > Run
2. type gpedit.msc press OK
3. Under 'Computer Configuration' extend the 'Administrative Templates' folder
4. Extend the 'Windows Components' folder.
5. Highlight or select the 'Internet Explorer' folder
6. In the right-side panel is an option called 'Prevent performance of First Run Customize Settings' - double click to enter this option.
7. Select the radio button labelled 'Enabled' and in the Drop-down menu labelled 'Select your choice', set this to 'Go directly to home page.
Solved James' IE7 startup problem.
Needed to disable the Antiphishing filter!
# re: The new Internet Explorer first run screen
Monday, December 11, 2006 5:41 AM by Dave R
I have solved this problem by applying the following setting with GPEDIT.
1. Start > Run
2. type gpedit.msc press OK
3. Under 'Computer Configuration' extend the 'Administrative Templates' folder
4. Extend the 'Windows Components' folder.
5. Highlight or select the 'Internet Explorer' folder
6. In the right-side panel is an option called 'Prevent performance of First Run Customize Settings' - double click to enter this option.
7. Select the radio button labelled 'Enabled' and in the Drop-down menu labelled 'Select your choice', set this to 'Go directly to home page.
30 May 2007
18 May 2007
Understanding the FAT32 Filesystem
Paul's 8051 Code Library: Understanding the FAT32 Filesystem
This gives a clear illustration of how to process data on a FAT32 partition. It also includes links to MP3 players utilising this.
This gives a clear illustration of how to process data on a FAT32 partition. It also includes links to MP3 players utilising this.
09 May 2007
Courses @ gulland.com
Courses @ gulland.com: "This course is designed to give you a thorough grounding in JavaServer Pages."
04 May 2007
11 April 2007
JavaTechniques » Linux X11 Libraries for Headless Mode
JavaTechniques » Linux X11 Libraries for Headless Mode: "Linux X11 Libraries for Headless Mode"
08 April 2007
20 March 2007
12 March 2007
07 March 2007
25 February 2007
Radar Principles
Radargrundlagen
This seems to be a good tutorial site. It covers a wide range of material in quite some depth.
The radar equation is derived from first principles, and good explaination is given of pulse compression and other tactical radar principles.
This seems to be a good tutorial site. It covers a wide range of material in quite some depth.
The radar equation is derived from first principles, and good explaination is given of pulse compression and other tactical radar principles.
14 February 2007
07 February 2007
05 February 2007
04 February 2007
Take a Walk on the Wild Side
Take a Walk on the Wild Side: "The hardest thing you can do with Axis is try and get it working in an Applet, in plain client-side code it's normally very straightforward"
03 February 2007
28 January 2007
LNB switching system for Sky Digital
LNB switching system for Sky Digital
Includes info on hidden service menu
Includes info on hidden service menu
[services] [4] [0] [1] [select]
27 January 2007
Converting flac to mp3 or ogg - FreaxWiki
Converting flac to mp3 or ogg - FreaxWiki: "Converting flac to mp3 or ogg"
25 January 2007
24 January 2007
Linuxkidd's WPKG Web Interface
Linuxkidd's WPKG Web Interface: "This interface was created to ease the use of WPKG, a great Software distribution and update tool designed to help Windows Administrators."
WPKG allows a repository to deliver msi and exe files for updating Windows clients from a central location. The repository can be served from a Linux/Samba host.
WPKG allows a repository to deliver msi and exe files for updating Windows clients from a central location. The repository can be served from a Linux/Samba host.
18 January 2007
JSP-INTEREST archives -- September 1999 (#785)
JSP-INTEREST archives -- September 1999 (#785): "login.jsp"
17 January 2007
30 December 2006
28 December 2006
Diffingo Solutions Inc. / Solutions Diffingo Inc. - audio-convert-mod v3.43
Diffingo Solutions Inc. / Solutions Diffingo Inc. - audio-convert-mod v3.43: "It is a (GNOME) nautilus script that will convert a file or batch convert many files to or from almost any format at a right-click"
20 December 2006
14 December 2006
evolutionNext WebLog - Apache Axis: Remote administrator access is not allowed!
evolutionNext WebLog - Apache Axis: Remote administrator access is not allowed!: "If you do not have the server-config.wsdd file, open your axis.jar file and look in org/apache/axis/server. You will find a server-config.wsdd file. Copy this file into the WEB-INF directory of your web server."
This gave relief from a frustrating period trying to get WSDD deployment working with Axis 1.4 under Fedora Core 5.
AxisFault reports with error 401 were persistently being issued.
The configuration fails to include a server-config.wsdd file, by default.
This gave relief from a frustrating period trying to get WSDD deployment working with Axis 1.4 under Fedora Core 5.
AxisFault reports with error 401 were persistently being issued.
The configuration fails to include a server-config.wsdd file, by default.
13 December 2006
MKSearch : Howto : Jpackage with Sun Java on FC3
MKSearch : Howto : Jpackage with Sun Java on FC3: "Jpackage with Sun Java on FC3"
09 December 2006
Problems installing Java-Linux Applications-Linux Forums
Problems installing Java-Linux Applications-Linux Forums
Response toMissing Dependency: jdk = 2000:1.5.0_09-fcs is needed by package java-1.5.0-sun-compat
Response to
03 December 2006
CocoonWiki: ApacheModProxy
CocoonWiki: ApacheModProxy
This is a good description of HowTo back-end Tomcat behind Apache.
In particular, the use of mod_proxy is restricted to entire folders, and not selected file types.
The use of mod_rewrite is given as a better method to tune this behaviour.
This is a good description of HowTo back-end Tomcat behind Apache.
In particular, the use of mod_proxy is restricted to entire folders, and not selected file types.
The use of mod_rewrite is given as a better method to tune this behaviour.
