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To get started with this blank [[TiddlyWiki]], you'll need to modify the following tiddlers:
* [[SiteTitle]] & [[SiteSubtitle]]: The title and subtitle of the site, as shown above (after saving, they will also appear in the browser title bar)
* [[MainMenu]]: The menu (usually on the left)
* [[DefaultTiddlers]]: Contains the names of the tiddlers that you want to appear when the TiddlyWiki is opened
You'll also need to enter your username for signing your edits: <<option txtUserName>>

These [[InterfaceOptions]] for customising [[TiddlyWiki]] are saved in your browser

Your username for signing your edits. Write it as a [[WikiWord]] (eg [[JoeBloggs]])

<<option txtUserName>>
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<<option chkAutoSave>> [[AutoSave]]
<<option chkRegExpSearch>> [[RegExpSearch]]
<<option chkCaseSensitiveSearch>> [[CaseSensitiveSearch]]
<<option chkAnimate>> [[EnableAnimations]]

----
Also see [[AdvancedOptions]]

<<importTiddlers>>

* Phonons? 
* The Cooper Problem
* BCS theory

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TertiaryMid: #999
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Error: #f88

[[Here | http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/QCMLectureNotes.pdf]]  are the detailed notes for the C6 part of the course.     I will continue to update and revise the notes by removing typos etc. 

For the rest of the course I am posting "caveat emptor" handwritten notes which are not at all guaranteed to be correct.    Some people may find these useful.

[[Part 1 | http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/QCM1.pdf]]  Intro to Superfluids and Superconductors
[[Part 2 | http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/QCM2.pdf]] Two Fluid Model and Vortices
[[Part 3 | http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/QCM3.pdf]] Landau Criterion and Intro to Charged Superfluids / London Theory
[[Part 4 | http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/QCM4.pdf]] Superconducting Vortices / Type I and Type II Superconductors
[[Part 5 | http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/QCM5.pdf]]  Microscopic Theory / Second Quantization / Gross Pitaevskii and Bogoliubov Theory
[[Part 6 | http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/QCM6.pdf]] Feynman Theory of Superfluidity
[[Part 7 | http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/QCM7.pdf]] Ginzburg Landau Theory / Anderson Higgs Mechanism / Coherence Length / Vortex Structure
[[Part 8 | http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/QCM8.pdf]]  Interacting Fermions / Second Quantization / First Order Perturbation Theory / Hartree and Fock Terms
[[Part 9 | http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/QCM9.pdf]] Hartree Fock Theory
[[Part 10 | http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/QCM10.pdf]] Coulomb Interaction / Screening and Response
[[Part 11 | http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/QCM11.pdf]] Linear Response Theory / Lindhard, Thomas Fermi, RPA / Plasmons
[[Part 12 | http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/QCM12.pdf]] Landau Theory of Fermi Liquids part 1
[[Part 13 | http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/QCM13.pdf]] Landau Theory of Fermi Liquids part 2
[[Part 14 | http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/QCM14.pdf]] BCS theory part 1:  Phonon Attraction Mechanism / Cooper Problem
[[Part 15 | http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/QCM15.pdf]]  BCS wavefunction 
[[Part 16 | http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/QCM16.pdf]] Bogoliubov Excitation Spectrum
[[Part 17 | http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/QCM17.pdf]]  Quantum Hall Effect / Laughlin Gauge Invariance Argument
[[Part 18 | http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/QCM18.pdf]]  Chern Numbers / Quantum Spin Hall / Topological Insulators in 2 and 3 D
[[Part 19 | http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/QCM19.pdf]]  Fractional Quantum Hall Effect

[[Oxford Quantum Condensed Matter Physics II]]

[[Exercises on Landau Theory of Phase Transitions | http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/LandauTheory.pdf]]  (Required for C6)
[[Exercises on Superfluids and Superconductors| http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/Superfluids.pdf]]
[[Exercises on Fermi Liquid Theory| http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/FermiLiquids.pdf]] (Note: BCS theory moved to next set)
[[Exercises on BCS and Topological Matter| http://www-thphys.physics.ox.ac.uk/people/SteveSimon/QCM2016/BCSandTopological.pdf]]

* Introduction
* Weakly Interacting Fermions
** Perturbation Theory
** Hartree Fock
** Effective Mass
* Response Functions and Screening
** Thomas Fermi
** RPA
** Plasmons
* Landau Fermi Liquid Theory

* Coupling to Electromagnetism
* Coherence Length and Penetration Depth ;  Type I and Type II
* London Theory
* Critical Field
* Flux Quantization

* Why we are interested
** Examples of Phase Transitions
** Examples of Critical Exponents and Idea of Universality
** Importance of Symmetry
* Example:  The Ising Model
** Mean Field  and Bragg Williams
** Some Critical Exponents
* Landau Theory
** Order Parameter 
** Rederivation of Ising Results
** Some other order parameters
*** Z3 potts
*** Nematic
* Landau Ginzburg Theory
** Correlation Length Exponent
** Ginzburg Criterion
** Goldstone Modes
* Landau Ginzburg Model of Superfluids

Hilary Term 2016

All Lectures in [[ The Denys Wilkenson Building | https://en.wikipedia.org/wiki/Denys_Wilkinson_Building]] of the Physics Department
* Landau Theory of Phases and Phase Transitions (Required for [[ MPhys C6 |  https://www2.physics.ox.ac.uk/study-here/undergraduates/the-courses/4-year-mphys]] and  [[ MMathPhys | http://mmathphys.physics.ox.ac.uk/ ]] option)
** Wk 1 Mon 9  am  Denis Sciama Lecture Room
** Wk 1 Wed 10am  Denis Sciama Lecture Room
** Wk 1 Thu  11am  Denis Sciama Lecture Room
** Wk 2 Mon 9  am  Denis Sciama Lecture Room
** Wk 2 Wed 10am  Denis Sciama Lecture Room
* Remainder of Course (Superfluids, Superconductors, Fermi Liquids, Quantum Hall Effects, Topological Matter, etc, etc). 
** Wk 2 Thu   11am Fisher Room
** Wk 3 Mon   9am  Fisher Room
** Wk 3 Mon   10am  Conference Room   NOTE THIS IS AN ADDITION
** Wk 3 Wed   No Lecture   NOTE THIS IS A CANCELATION
** Wk 3 Thu    No Lecture   NOTE THIS IS A CANCELATION
** Wk 4 Mon   9am  Fisher Room
** Wk 4 Mon   10am  Conference Room   NOTE THIS IS AN ADDITION
** Wk 4 Wed   10am Fisher Room
** Wk 4 Thu    11am Fisher Room
** Wk 5 Mon   9am  Fisher Room
** Wk 5 Wed   10am Fisher Room
** Wk 5 Thu    11am Fisher Room
** Wk 6 Mon   9am  Fisher Room
** Wk 6 Wed   10am Fisher Room
** Wk 6 Thu    11am Fisher Room
** Wk 7 Mon   9am  Fisher Room
** Wk 7 Wed   10am Fisher Room
** Wk 7 Thu    11am Fisher Room
** Wk 8 Mon   9am  Fisher Room
** Wk 8 Wed   10am Fisher Room
** Wk 8 Thu    11am Fisher Room

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[[Home | Oxford Quantum Condensed Matter Physics II]]
[[Syllabus]]
[[Lecture Schedule]]
[[Course Notes]]
[[Exercises]]
[[Message Board]]
[[References]]

This course has a message board.    The link is here

http://members5.boardhost.com/Oxfor/

Now, you might ask "why do we need a message board?". 

Answer 1: I inevitably receive dozens of emails from students, or even from tutors, asking for clarification of some point or other (many of these occur over Easter break, or as the exam approaches). Every time I answer such a question it occurs to me that it would make a whole lot of sense to have all of these questions and their answers compiled somewhere central where everyone can benefit from reading them. 

Answer 2: On a message board students and/or tutors can not only ask questions, they can answer questions too. We are quite a large community, and by helping each other we can all succeed to a greater level. I'm hoping that this board will become a communications hub for students to consult other students during their studies. (And then I can also check through to make sure that students are in fact answering correctly!) 

Answer 3: There must be some way to use modern media better to assist in the learning process. OK, I admit, the message board is 20 year old technology, but I coulnd't figure out how to make twitter, instagram, or tumblr work for this course. If anyone has ideas for how we might become even more modern, please let me know!

* Landau Theory  (Required for C6!)
** Introduction to Phase Transitions
*** The Importance of Phase Transitions.  Some Examples.
*** Symmetry
*** Critical exponents and Universality

** Example: Ising Mode
*** Mean Field Theory
*** Bragg Williams Theory and Free Energy

** Intro to Landau Theory
*** The Notion of an Order Parameter
*** Some Critical Exponents

** Landau Theory 
*** Some More Order Parameters
**** Heisenberg
**** XY
**** Nematic
*** Some more Critical Exponents

** Landau Ginzburg Theory
*** Correlation Length Exponent
*** Ginzburg Criterion

** Landau Ginzburg Theory of Superfluidity  (end of C6 Requirement)

* Theory of Superfluids

 Do you mean to be looking at the 2017 web page.  [[Here |  http://oxfordquantummatter2017.tiddlyspot.com/ ]] 

This is the official web site for Quantum Condensed Matter II course being taught in Hilary term 2016 as part of the [[ MMathPhys | http://mmathphys.physics.ox.ac.uk/ ]] program.   Part of this course is also required for the [[ MPhys C6 |  https://www2.physics.ox.ac.uk/study-here/undergraduates/the-courses/4-year-mphys]] course.

Prerequisites:    Officially this course is the 2nd part of the Quantum Condensed Matter I course taught in Michaelmas.   However, I am well aware that many people either did not attend this course (or perhaps did attend the course but didn't pay attention).  At any rate, while I will use some of the material taught in that course, I hope to make much of this course self contained so that a wider audience may be able to benefit. 

If you are in the [[ MMathPhys | http://mmathphys.physics.ox.ac.uk/ ]], your TA is [[Stefan Groha | http://users.ox.ac.uk/~magd4188/ ]] 

This page is a [[ TiddlyWiki | http://tiddlywiki.com/  ]].  It can be edited by anyone, but you can only save the edits if you have the password. 

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* Electrons in Magnetic Fields
* IQHE Laughlin Gauge Argument
* FQHE
* IQHE Ginzburg Landau
* FQHE Ginzburg Landau
* Topological Quantum Field Theories?

References that might be useful for this course include:

* For Landau Theory of Phases and Phase Transitions (C6 part of course)
** [[ Julia Yeomans, "Statistical Mechanics of Phase Transitions" | http://www.amazon.com/Statistical-Mechanics-Transitions-Science-Publications/dp/0198517300]]
** [[ Paul Fendley's Notes, Chapter 7  | http://users.ox.ac.uk/~phys1116/book.html]]     
** [[ Chaiken and Lubensky, Chapter 4ish| http://www.amazon.co.uk/Principles-Condensed-Matter-Physics-Chaikin/dp/0521794501 ]]
** [[Peter Olmsted's Notes | http://www1.physics.leeds.ac.uk/~phy6pdo/teaching/landau.pdf ]]
* For Superfluidity and Superconductivity
**  [[ James Annette, "Superconductivity, Superfluids, And Condensates"  | http://www.amazon.com/Superconductivity-Superfluids-Condensates-Condensed-Physics/dp/0198507569 ]]
* For Fermi Liquids
** [[ Pines and Nozieres, "Theory of Quantum Liquids" | http://www.amazon.com/Theory-Of-Quantum-Liquids-Advanced/dp/0201407744]].  Note, this considered THE classic text, but is not easy to read in my opinion.   
** [[Notes by Peter Hirshfeld, Univesity of Florida, Chapter 2 || http://www.phys.ufl.edu/~pjh/teaching/phz7427/7427notes/ch2.pdf ]]
** [[Notes by Dmitri Maslov, University of Florida  ||  http://www.phys.ufl.edu/~maslov/phz7427/7427_notes_ee.pdf ]] 

Taught Hilary Term 2016 
Part of the [[ MMathPhys | http://mmathphys.physics.ox.ac.uk/ ]]  and   [[ MPhys C6 |  https://www2.physics.ox.ac.uk/study-here/undergraduates/the-courses/4-year-mphys]] courses. 

Quantum Condensed Matter II

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[[Landau Theory of Phases and Phase Transitions]]  (Required for C6!)
[[Theory of Superfluidity]]
[[Fermi Liquids]]
[[BCS Theory of Superconductors]] 
[[Quantum Hall Effects and Topological Matter]]

config.options.txtUserName = "Steve Simon";

* Introduction to Superfluids and Superconductors
** Two Fluid Model and Quantized Circulation
** Landau Criterion for Superfluidity
** Two Fluid Model for Superconductors
*** London Theory
*** Flux Vortices
*** Type I and Type II superconductors
* Microscopic Superfluidity 
** Coherent States 
** Bose Condensation
** Gross Pitaevskii Equation
** Off Diagonal Long Range Order
** Feynman Theory of Superfluidity
*Ginzburg Landau Theory of Superfluids   
** Neutral Superfluids
** Charged Superfluids
** Anderson - Higgs Mechanism
** Rederviation of London Equations
** Ginzburg - Landau Parameter and Type I/II revisited
** Vortex Structure

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| !date | !user | !location | !storeUrl | !uploadDir | !toFilename | !backupdir | !origin |
| 30/01/2016 17:05:12 | Steve Simon | [[/|http://oxfordqcm2.tiddlyspot.com/]] | [[store.cgi|http://oxfordqcm2.tiddlyspot.com/store.cgi]] | . | [[index.html | http://oxfordqcm2.tiddlyspot.com/index.html]] | . |
| 09/02/2016 16:12:27 | Steve Simon | [[/|http://oxfordqcm2.tiddlyspot.com/]] | [[store.cgi|http://oxfordqcm2.tiddlyspot.com/store.cgi]] | . | [[index.html | http://oxfordqcm2.tiddlyspot.com/index.html]] | . |
| 18/02/2016 09:49:49 | Steve Simon | [[/|http://oxfordqcm2.tiddlyspot.com/]] | [[store.cgi|http://oxfordqcm2.tiddlyspot.com/store.cgi]] | . | [[index.html | http://oxfordqcm2.tiddlyspot.com/index.html]] | . | ok |
| 20/02/2016 09:01:41 | Steve Simon | [[/|http://oxfordqcm2.tiddlyspot.com/]] | [[store.cgi|http://oxfordqcm2.tiddlyspot.com/store.cgi]] | . | [[index.html | http://oxfordqcm2.tiddlyspot.com/index.html]] | . |
| 21/02/2016 15:48:07 | Steve Simon | [[/|http://oxfordqcm2.tiddlyspot.com/]] | [[store.cgi|http://oxfordqcm2.tiddlyspot.com/store.cgi]] | . | [[index.html | http://oxfordqcm2.tiddlyspot.com/index.html]] | . | ok |
| 21/02/2016 15:49:27 | Steve Simon | [[/|http://oxfordqcm2.tiddlyspot.com/]] | [[store.cgi|http://oxfordqcm2.tiddlyspot.com/store.cgi]] | . | [[index.html | http://oxfordqcm2.tiddlyspot.com/index.html]] | . |
| 29/02/2016 12:28:00 | Steve Simon | [[/|http://oxfordqcm2.tiddlyspot.com/]] | [[store.cgi|http://oxfordqcm2.tiddlyspot.com/store.cgi]] | . | [[index.html | http://oxfordqcm2.tiddlyspot.com/index.html]] | . |
| 07/03/2016 11:49:07 | Steve Simon | [[/|http://oxfordqcm2.tiddlyspot.com/]] | [[store.cgi|http://oxfordqcm2.tiddlyspot.com/store.cgi]] | . | [[index.html | http://oxfordqcm2.tiddlyspot.com/index.html]] | . | ok |
| 07/03/2016 12:01:56 | Steve Simon | [[/|http://oxfordqcm2.tiddlyspot.com/]] | [[store.cgi|http://oxfordqcm2.tiddlyspot.com/store.cgi]] | . | [[index.html | http://oxfordqcm2.tiddlyspot.com/index.html]] | . |
| 10/03/2016 15:21:16 | Steve Simon | [[/|http://oxfordqcm2.tiddlyspot.com/]] | [[store.cgi|http://oxfordqcm2.tiddlyspot.com/store.cgi]] | . | [[index.html | http://oxfordqcm2.tiddlyspot.com/index.html]] | . |

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		var markList = wizard.getElement("markList");
		var listWrapper = document.createElement("div");
		markList.parentNode.insertBefore(listWrapper,markList);
		wizard.setValue("listWrapper",listWrapper);
		this.refreshOptions(listWrapper,false);
		var uploadCaption;
		if (document.location.toString().substr(0,4) == "http") 
			uploadCaption = config.macros.upload.label.saveLabel;
		else
			uploadCaption = config.macros.upload.label.uploadLabel;
		
		wizard.setButtons([
				{caption: uploadCaption, tooltip: config.macros.upload.label.promptOption, 
					onClick: config.macros.upload.action},
				{caption: this.cancelButton, tooltip: this.cancelButtonPrompt, onClick: this.onCancel}
				
			]);
	},
	options: [
		"txtUploadUserName",
		"pasUploadPassword",
		"txtUploadStoreUrl",
		"txtUploadDir",
		"txtUploadFilename",
		"txtUploadBackupDir",
		"chkUploadLog",
		"txtUploadLogMaxLine"		
	],
	refreshOptions: function(listWrapper) {
		var opts = [];
		for(i=0; i<this.options.length; i++) {
			var opt = {};
			opts.push();
			opt.option = "";
			n = this.options[i];
			opt.name = n;
			opt.lowlight = !config.optionsDesc[n];
			opt.description = opt.lowlight ? this.unknownDescription : config.optionsDesc[n];
			opts.push(opt);
		}
		var listview = ListView.create(listWrapper,opts,this.listViewTemplate);
		for(n=0; n<opts.length; n++) {
			var type = opts[n].name.substr(0,3);
			var h = config.macros.option.types[type];
			if (h && h.create) {
				h.create(opts[n].colElements['option'],type,opts[n].name,opts[n].name,"no");
			}
		}
		
	},
	onCancel: function(e)
	{
		backstage.switchTab(null);
		return false;
	},
	
	wizardTitle: "Upload with options",
	step1Title: "These options are saved in cookies in your browser",
	step1Html: "<input type='hidden' name='markList'></input><br>",
	cancelButton: "Cancel",
	cancelButtonPrompt: "Cancel prompt",
	listViewTemplate: {
		columns: [
			{name: 'Description', field: 'description', title: "Description", type: 'WikiText'},
			{name: 'Option', field: 'option', title: "Option", type: 'String'},
			{name: 'Name', field: 'name', title: "Name", type: 'String'}
			],
		rowClasses: [
			{className: 'lowlight', field: 'lowlight'} 
			]}
};

//
// upload functions
//

if (!bidix.upload) bidix.upload = {};

if (!bidix.upload.messages) bidix.upload.messages = {
	//from saving
	invalidFileError: "The original file '%0' does not appear to be a valid TiddlyWiki",
	backupSaved: "Backup saved",
	backupFailed: "Failed to upload backup file",
	rssSaved: "RSS feed uploaded",
	rssFailed: "Failed to upload RSS feed file",
	emptySaved: "Empty template uploaded",
	emptyFailed: "Failed to upload empty template file",
	mainSaved: "Main TiddlyWiki file uploaded",
	mainFailed: "Failed to upload main TiddlyWiki file. Your changes have not been saved",
	//specific upload
	loadOriginalHttpPostError: "Can't get original file",
	aboutToSaveOnHttpPost: 'About to upload on %0 ...',
	storePhpNotFound: "The store script '%0' was not found."
};

bidix.upload.uploadChanges = function(onlyIfDirty,tiddlers,storeUrl,toFilename,uploadDir,backupDir,username,password)
{
	var callback = function(status,uploadParams,original,url,xhr) {
		if (!status) {
			displayMessage(bidix.upload.messages.loadOriginalHttpPostError);
			return;
		}
		if (bidix.debugMode) 
			alert(original.substr(0,500)+"\n...");
		// Locate the storeArea div's 
		var posDiv = locateStoreArea(original);
		if((posDiv[0] == -1) || (posDiv[1] == -1)) {
			alert(config.messages.invalidFileError.format([localPath]));
			return;
		}
		bidix.upload.uploadRss(uploadParams,original,posDiv);
	};
	
	if(onlyIfDirty && !store.isDirty())
		return;
	clearMessage();
	// save on localdisk ?
	if (document.location.toString().substr(0,4) == "file") {
		var path = document.location.toString();
		var localPath = getLocalPath(path);
		saveChanges();
	}
	// get original
	var uploadParams = new Array(storeUrl,toFilename,uploadDir,backupDir,username,password);
	var originalPath = document.location.toString();
	// If url is a directory : add index.html
	if (originalPath.charAt(originalPath.length-1) == "/")
		originalPath = originalPath + "index.html";
	var dest = config.macros.upload.destFile(storeUrl,toFilename,uploadDir);
	var log = new bidix.UploadLog();
	log.startUpload(storeUrl, dest, uploadDir,  backupDir);
	displayMessage(bidix.upload.messages.aboutToSaveOnHttpPost.format([dest]));
	if (bidix.debugMode) 
		alert("about to execute Http - GET on "+originalPath);
	var r = doHttp("GET",originalPath,null,null,username,password,callback,uploadParams,null);
	if (typeof r == "string")
		displayMessage(r);
	return r;
};

bidix.upload.uploadRss = function(uploadParams,original,posDiv) 
{
	var callback = function(status,params,responseText,url,xhr) {
		if(status) {
			var destfile = responseText.substring(responseText.indexOf("destfile:")+9,responseText.indexOf("\n", responseText.indexOf("destfile:")));
			displayMessage(bidix.upload.messages.rssSaved,bidix.dirname(url)+'/'+destfile);
			bidix.upload.uploadMain(params[0],params[1],params[2]);
		} else {
			displayMessage(bidix.upload.messages.rssFailed);			
		}
	};
	// do uploadRss
	if(config.options.chkGenerateAnRssFeed) {
		var rssPath = uploadParams[1].substr(0,uploadParams[1].lastIndexOf(".")) + ".xml";
		var rssUploadParams = new Array(uploadParams[0],rssPath,uploadParams[2],'',uploadParams[4],uploadParams[5]);
		var rssString = generateRss();
		// no UnicodeToUTF8 conversion needed when location is "file" !!!
		if (document.location.toString().substr(0,4) != "file")
			rssString = convertUnicodeToUTF8(rssString);	
		bidix.upload.httpUpload(rssUploadParams,rssString,callback,Array(uploadParams,original,posDiv));
	} else {
		bidix.upload.uploadMain(uploadParams,original,posDiv);
	}
};

bidix.upload.uploadMain = function(uploadParams,original,posDiv) 
{
	var callback = function(status,params,responseText,url,xhr) {
		var log = new bidix.UploadLog();
		if(status) {
			// if backupDir specified
			if ((params[3]) && (responseText.indexOf("backupfile:") > -1))  {
				var backupfile = responseText.substring(responseText.indexOf("backupfile:")+11,responseText.indexOf("\n", responseText.indexOf("backupfile:")));
				displayMessage(bidix.upload.messages.backupSaved,bidix.dirname(url)+'/'+backupfile);
			}
			var destfile = responseText.substring(responseText.indexOf("destfile:")+9,responseText.indexOf("\n", responseText.indexOf("destfile:")));
			displayMessage(bidix.upload.messages.mainSaved,bidix.dirname(url)+'/'+destfile);
			store.setDirty(false);
			log.endUpload("ok");
		} else {
			alert(bidix.upload.messages.mainFailed);
			displayMessage(bidix.upload.messages.mainFailed);
			log.endUpload("failed");			
		}
	};
	// do uploadMain
	var revised = bidix.upload.updateOriginal(original,posDiv);
	bidix.upload.httpUpload(uploadParams,revised,callback,uploadParams);
};

bidix.upload.httpUpload = function(uploadParams,data,callback,params)
{
	var localCallback = function(status,params,responseText,url,xhr) {
		url = (url.indexOf("nocache=") < 0 ? url : url.substring(0,url.indexOf("nocache=")-1));
		if (xhr.status == 404)
			alert(bidix.upload.messages.storePhpNotFound.format([url]));
		if ((bidix.debugMode) || (responseText.indexOf("Debug mode") >= 0 )) {
			alert(responseText);
			if (responseText.indexOf("Debug mode") >= 0 )
				responseText = responseText.substring(responseText.indexOf("\n\n")+2);
		} else if (responseText.charAt(0) != '0') 
			alert(responseText);
		if (responseText.charAt(0) != '0')
			status = null;
		callback(status,params,responseText,url,xhr);
	};
	// do httpUpload
	var boundary = "---------------------------"+"AaB03x";	
	var uploadFormName = "UploadPlugin";
	// compose headers data
	var sheader = "";
	sheader += "--" + boundary + "\r\nContent-disposition: form-data; name=\"";
	sheader += uploadFormName +"\"\r\n\r\n";
	sheader += "backupDir="+uploadParams[3] +
				";user=" + uploadParams[4] +
				";password=" + uploadParams[5] +
				";uploaddir=" + uploadParams[2];
	if (bidix.debugMode)
		sheader += ";debug=1";
	sheader += ";;\r\n"; 
	sheader += "\r\n" + "--" + boundary + "\r\n";
	sheader += "Content-disposition: form-data; name=\"userfile\"; filename=\""+uploadParams[1]+"\"\r\n";
	sheader += "Content-Type: text/html;charset=UTF-8" + "\r\n";
	sheader += "Content-Length: " + data.length + "\r\n\r\n";
	// compose trailer data
	var strailer = new String();
	strailer = "\r\n--" + boundary + "--\r\n";
	data = sheader + data + strailer;
	if (bidix.debugMode) alert("about to execute Http - POST on "+uploadParams[0]+"\n with \n"+data.substr(0,500)+ " ... ");
	var r = doHttp("POST",uploadParams[0],data,"multipart/form-data; ;charset=UTF-8; boundary="+boundary,uploadParams[4],uploadParams[5],localCallback,params,null);
	if (typeof r == "string")
		displayMessage(r);
	return r;
};

// same as Saving's updateOriginal but without convertUnicodeToUTF8 calls
bidix.upload.updateOriginal = function(original, posDiv)
{
	if (!posDiv)
		posDiv = locateStoreArea(original);
	if((posDiv[0] == -1) || (posDiv[1] == -1)) {
		alert(config.messages.invalidFileError.format([localPath]));
		return;
	}
	var revised = original.substr(0,posDiv[0] + startSaveArea.length) + "\n" +
				store.allTiddlersAsHtml() + "\n" +
				original.substr(posDiv[1]);
	var newSiteTitle = getPageTitle().htmlEncode();
	revised = revised.replaceChunk("<title"+">","</title"+">"," " + newSiteTitle + " ");
	revised = updateMarkupBlock(revised,"PRE-HEAD","MarkupPreHead");
	revised = updateMarkupBlock(revised,"POST-HEAD","MarkupPostHead");
	revised = updateMarkupBlock(revised,"PRE-BODY","MarkupPreBody");
	revised = updateMarkupBlock(revised,"POST-SCRIPT","MarkupPostBody");
	return revised;
};

//
// UploadLog
// 
// config.options.chkUploadLog :
//		false : no logging
//		true : logging
// config.options.txtUploadLogMaxLine :
//		-1 : no limit
//      0 :  no Log lines but UploadLog is still in place
//		n :  the last n lines are only kept
//		NaN : no limit (-1)

bidix.UploadLog = function() {
	if (!config.options.chkUploadLog) 
		return; // this.tiddler = null
	this.tiddler = store.getTiddler("UploadLog");
	if (!this.tiddler) {
		this.tiddler = new Tiddler();
		this.tiddler.title = "UploadLog";
		this.tiddler.text = "| !date | !user | !location | !storeUrl | !uploadDir | !toFilename | !backupdir | !origin |";
		this.tiddler.created = new Date();
		this.tiddler.modifier = config.options.txtUserName;
		this.tiddler.modified = new Date();
		store.addTiddler(this.tiddler);
	}
	return this;
};

bidix.UploadLog.prototype.addText = function(text) {
	if (!this.tiddler)
		return;
	// retrieve maxLine when we need it
	var maxLine = parseInt(config.options.txtUploadLogMaxLine,10);
	if (isNaN(maxLine))
		maxLine = -1;
	// add text
	if (maxLine != 0) 
		this.tiddler.text = this.tiddler.text + text;
	// Trunck to maxLine
	if (maxLine >= 0) {
		var textArray = this.tiddler.text.split('\n');
		if (textArray.length > maxLine + 1)
			textArray.splice(1,textArray.length-1-maxLine);
			this.tiddler.text = textArray.join('\n');		
	}
	// update tiddler fields
	this.tiddler.modifier = config.options.txtUserName;
	this.tiddler.modified = new Date();
	store.addTiddler(this.tiddler);
	// refresh and notifiy for immediate update
	story.refreshTiddler(this.tiddler.title);
	store.notify(this.tiddler.title, true);
};

bidix.UploadLog.prototype.startUpload = function(storeUrl, toFilename, uploadDir,  backupDir) {
	if (!this.tiddler)
		return;
	var now = new Date();
	var text = "\n| ";
	var filename = bidix.basename(document.location.toString());
	if (!filename) filename = '/';
	text += now.formatString("0DD/0MM/YYYY 0hh:0mm:0ss") +" | ";
	text += config.options.txtUserName + " | ";
	text += "[["+filename+"|"+location + "]] |";
	text += " [[" + bidix.basename(storeUrl) + "|" + storeUrl + "]] | ";
	text += uploadDir + " | ";
	text += "[[" + bidix.basename(toFilename) + " | " +toFilename + "]] | ";
	text += backupDir + " |";
	this.addText(text);
};

bidix.UploadLog.prototype.endUpload = function(status) {
	if (!this.tiddler)
		return;
	this.addText(" "+status+" |");
};

//
// Utilities
// 

bidix.checkPlugin = function(plugin, major, minor, revision) {
	var ext = version.extensions[plugin];
	if (!
		(ext  && 
			((ext.major > major) || 
			((ext.major == major) && (ext.minor > minor))  ||
			((ext.major == major) && (ext.minor == minor) && (ext.revision >= revision))))) {
			// write error in PluginManager
			if (pluginInfo)
				pluginInfo.log.push("Requires " + plugin + " " + major + "." + minor + "." + revision);
			eval(plugin); // generate an error : "Error: ReferenceError: xxxx is not defined"
	}
};

bidix.dirname = function(filePath) {
	if (!filePath) 
		return;
	var lastpos;
	if ((lastpos = filePath.lastIndexOf("/")) != -1) {
		return filePath.substring(0, lastpos);
	} else {
		return filePath.substring(0, filePath.lastIndexOf("\\"));
	}
};

bidix.basename = function(filePath) {
	if (!filePath) 
		return;
	var lastpos;
	if ((lastpos = filePath.lastIndexOf("#")) != -1) 
		filePath = filePath.substring(0, lastpos);
	if ((lastpos = filePath.lastIndexOf("/")) != -1) {
		return filePath.substring(lastpos + 1);
	} else
		return filePath.substring(filePath.lastIndexOf("\\")+1);
};

bidix.initOption = function(name,value) {
	if (!config.options[name])
		config.options[name] = value;
};

//
// Initializations
//

// require PasswordOptionPlugin 1.0.1 or better
bidix.checkPlugin("PasswordOptionPlugin", 1, 0, 1);

// styleSheet
setStylesheet('.txtUploadStoreUrl, .txtUploadBackupDir, .txtUploadDir {width: 22em;}',"uploadPluginStyles");

//optionsDesc
merge(config.optionsDesc,{
	txtUploadStoreUrl: "Url of the UploadService script (default: store.php)",
	txtUploadFilename: "Filename of the uploaded file (default: in index.html)",
	txtUploadDir: "Relative Directory where to store the file (default: . (downloadService directory))",
	txtUploadBackupDir: "Relative Directory where to backup the file. If empty no backup. (default: ''(empty))",
	txtUploadUserName: "Upload Username",
	pasUploadPassword: "Upload Password",
	chkUploadLog: "do Logging in UploadLog (default: true)",
	txtUploadLogMaxLine: "Maximum of lines in UploadLog (default: 10)"
});

// Options Initializations
bidix.initOption('txtUploadStoreUrl','');
bidix.initOption('txtUploadFilename','');
bidix.initOption('txtUploadDir','');
bidix.initOption('txtUploadBackupDir','');
bidix.initOption('txtUploadUserName','');
bidix.initOption('pasUploadPassword','');
bidix.initOption('chkUploadLog',true);
bidix.initOption('txtUploadLogMaxLine','10');


// Backstage
merge(config.tasks,{
	uploadOptions: {text: "upload", tooltip: "Change UploadOptions and Upload", content: '<<uploadOptions>>'}
});
config.backstageTasks.push("uploadOptions");


//}}}