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Can Someone suggest me a good open source java library to read ECG data in MFER / HL7 / Other formats?
There are a number of options for a java library that parses HL7. For example, you could use the HAPI library, available on sourceforge at http://hl7api.sourceforge.net/. There is also a .NET version of that library at http://nhapi.sourceforge.net/home.php, for those that prefer that platform. Another Java-based option is HL7Comm at http://nule.org/wp/?page_id=63.
More options can be found on the Wikipedia page at http://en.wikipedia.org/wiki/Health_Level_7#Open_source_tools, and at http://www.hl7.org.au/HL7-Tools.htm.
For ECG processing in general, see the OpenECG portal at http://www.openecg.net/.
One of the standard ECG software analysis libraries is WFDB and PhysioNet:
http://www.physionet.org/physiotools/wag/wag.htm
Two American National Standards, ANSI/AAMI EC38:1998 (Ambulatory Electrocardiographs) and ANSI/AAMI EC57:1998 (Testing and Reporting Performance Results of Cardiac Rhythm and ST Segment Measurement Algorithms) require the use of several of the WFDB applications for evaluation of certain devices and algorithms.
There are wrappers written, so you can use Java to access the code:
http://www.physionet.org/physiotools/wfdb-swig.shtml
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I have to develop trade capture modules in JAVA using Financial Information eXchange(FIX) Protocol 5.0 SP2.
Although I've tried to look up some tutorials, I cannot get any sample source codes.
How can I get some sample source codes in JAVA using FIX protocol 5.0 SP2?
FIX is a protocol, not a library, so searching for "FIX source code" is misguided and won't get you anywhere.
You need to decide on a library or engine that implements the FIX protocol, and then find examples apps that use it.
For Java, I can suggest QuickFIX/j. There's plenty of docs on that site, the source repo has demo apps.
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I am searching for a library (or framework or graph db function or example code) to split a undirected weighted graph into clusters.
Additional requirement would be that you can configure the numbers of clusters generated.
I already looked at different things:
JUNG Framework: Seems not to support weighted edges for clustering algorithms.
Neo4J DB: Provides some algorithms in core java API, but not for clustering.
JGraphT: No clustering algorithms.
Igraph: Not available for Java, only Python, C and R
Does anyone know any other graph clustering algorithm implementations accessible for Java?
Thank you!
Gephi is implemented in Java and contains various community detection algorithms (check the available plugins). It is open source and there's an API system allowing you to integrate its classes in your own source code, or the opposite (develop gephi modules).
See also the answers to this question: https://stats.stackexchange.com/questions/2948/how-to-do-community-detection-in-a-weighted-social-network-graph
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Does anyone know of a good method to automate converting Java DTOs to TypeScript?
(these objects used in JSON REST APIs)
Is there a methodology, technique or technology which would allow me to do this more quickly and efficiently?
I'd take a look at some of the more up-to-date JavaScript code generators working with Google's Protocol Buffers at GitHub: google/protobuf → Third Party Add ons as this is a language-agnostic Data Transfer Object technology with strong Java focus and heavy user base so using it might be "quick and efficient" and solid choice
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I want to develop an eBook reader app. What are some good libraries available to parse formats like .azw, .mobi, .pdf etc.?
As Ranhiru said, here and here you can see how PDFs are parsed.
For .mobi, however, there is no library, so you'll have to parse the format yourself. A full specification of the format can be read on the mobileread wiki.
With .azw files, it's different: if the Kindle ebook is DRM-free, then its format coincides with the .mobi one, i.e. they are absolutely interchangeable. Otherwise, it's very difficult to do, since you'll also have to generate a Kindle PID and perform the de-DRM-ing of the .azw file. There's a guide on how to do that on the desktop here. However, it is strongly not recommended, since it breaks the whole point of DRM and is illegal pretty much everywhere.
For mobi there isn't complete spec sheet available, but you should directly jump into PDB format which is extended & used by MOBI
http://jola.comm.pl/palm/opispdb.htm
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I have approximately 2000 images with QR codes in them, each representing exactly one letter. Does anyone know a good open source framework in Java (Java prefered, but any other language is fine, too) to decode them?
I have only found shareware frameworks and web services that won't allow me to upload 2000 images to their server.
Android has the "Barcode Scanner" app that can handle QR codes. The source code is available here. Being Android, it's written in Java (although using the Android API rather than J2SE, but that it should be trivial to port the part of the source that decodes the QR code).
I'm not sure about the licensing, you may want to check with ZXing before you help yourself to their code and use it in your own project.
ZXing is the de facto standard. It has pure Java bindings and a web server you can run. Look in zxingorg/ or try it at zxing.org/w/decode.jspx.