1 ///////////////////////////////////////////////////////////////////////////
3 // AliFemtoSimpleAnalysis - the most basic analysis there is. All other //
4 // inherit from this one. Provides basic functionality for the analysis. //
5 // To properly set up the analysis the following steps should be taken: //
7 // - create particle cuts and add them via SetFirstParticleCut and //
8 // SetSecondParticleCut. If one analyzes identical particle //
9 // correlations, the first particle cut must be also the second //
12 // - create pair cuts and add them via SetPairCut //
14 // - create one or many correlation functions and add them via //
15 // AddCorrFctn method. //
17 // - specify how many events are to be strored in the mixing buffer for //
18 // background construction //
20 // Then, when the analysis is run, for each event, the EventBegin is //
21 // called before any processing is done, then the ProcessEvent is called //
22 // which takes care of creating real and mixed pairs and sending them //
23 // to all the registered correlation functions. At the end of each event,//
24 // after all pairs are processed, EventEnd is called. After the whole //
25 // analysis finishes (there is no more events to process) Finish() is //
28 ///////////////////////////////////////////////////////////////////////////
29 #include "AliFemtoSimpleAnalysis.h"
30 #include "AliFemtoTrackCut.h"
31 #include "AliFemtoV0Cut.h"
32 #include "AliFemtoKinkCut.h"
39 ClassImp(AliFemtoSimpleAnalysis)
42 AliFemtoEventCut* copyTheCut(AliFemtoEventCut*);
43 AliFemtoParticleCut* copyTheCut(AliFemtoParticleCut*);
44 AliFemtoPairCut* copyTheCut(AliFemtoPairCut*);
45 AliFemtoCorrFctn* copyTheCorrFctn(AliFemtoCorrFctn*);
47 // this little function used to apply ParticleCuts (TrackCuts or V0Cuts) and fill ParticleCollections of picoEvent
48 // it is called from AliFemtoSimpleAnalysis::ProcessEvent()
49 void FillHbtParticleCollection(AliFemtoParticleCut* partCut,
50 AliFemtoEvent* hbtEvent,
51 AliFemtoParticleCollection* partCollection)
53 // Fill particle collections from the event
54 // by the particles that pass all the cuts
55 switch (partCut->Type()) {
56 case hbtTrack: // cut is cutting on Tracks
58 AliFemtoTrackCut* pCut = (AliFemtoTrackCut*) partCut;
59 AliFemtoTrack* pParticle;
60 AliFemtoTrackIterator pIter;
61 AliFemtoTrackIterator startLoop = hbtEvent->TrackCollection()->begin();
62 AliFemtoTrackIterator endLoop = hbtEvent->TrackCollection()->end();
63 for (pIter=startLoop;pIter!=endLoop;pIter++){
65 bool tmpPassParticle = pCut->Pass(pParticle);
66 pCut->FillCutMonitor(pParticle, tmpPassParticle);
68 AliFemtoParticle* particle = new AliFemtoParticle(pParticle,pCut->Mass());
69 partCollection->push_back(particle);
74 case hbtV0: // cut is cutting on V0s
76 AliFemtoV0Cut* pCut = (AliFemtoV0Cut*) partCut;
77 AliFemtoV0* pParticle;
78 AliFemtoV0Iterator pIter;
79 AliFemtoV0Iterator startLoop = hbtEvent->V0Collection()->begin();
80 AliFemtoV0Iterator endLoop = hbtEvent->V0Collection()->end();
81 // this following "for" loop is identical to the one above, but because of scoping, I can's see how to avoid repitition...
82 for (pIter=startLoop;pIter!=endLoop;pIter++){
84 bool tmpPassV0 = pCut->Pass(pParticle);
85 pCut->FillCutMonitor(pParticle,tmpPassV0);
87 AliFemtoParticle* particle = new AliFemtoParticle(pParticle,partCut->Mass());
88 partCollection->push_back(particle);
91 pCut->FillCutMonitor(hbtEvent,partCollection);// Gael 19/06/02
94 case hbtKink: // cut is cutting on Kinks -- mal 25May2001
96 AliFemtoKinkCut* pCut = (AliFemtoKinkCut*) partCut;
97 AliFemtoKink* pParticle;
98 AliFemtoKinkIterator pIter;
99 AliFemtoKinkIterator startLoop = hbtEvent->KinkCollection()->begin();
100 AliFemtoKinkIterator endLoop = hbtEvent->KinkCollection()->end();
101 // this following "for" loop is identical to the one above, but because of scoping, I can's see how to avoid repitition...
102 for (pIter=startLoop;pIter!=endLoop;pIter++){
104 bool tmpPass = pCut->Pass(pParticle);
105 pCut->FillCutMonitor(pParticle,tmpPass);
107 AliFemtoParticle* particle = new AliFemtoParticle(pParticle,partCut->Mass());
108 partCollection->push_back(particle);
114 cout << "FillHbtParticleCollection function (in AliFemtoSimpleAnalysis.cxx) - undefined Particle Cut type!!! \n";
117 //____________________________
118 AliFemtoSimpleAnalysis::AliFemtoSimpleAnalysis() :
119 fPicoEventCollectionVectorHideAway(0),
121 fCorrFctnCollection(0),
123 fFirstParticleCut(0),
124 fSecondParticleCut(0),
128 fNeventsProcessed(0),
129 fMinSizePartCollection(0)
131 // Default constructor
132 // mControlSwitch = 0;
133 fCorrFctnCollection = new AliFemtoCorrFctnCollection;
134 fMixingBuffer = new AliFemtoPicoEventCollection;
136 //____________________________
138 AliFemtoSimpleAnalysis::AliFemtoSimpleAnalysis(const AliFemtoSimpleAnalysis& a) :
140 fPicoEventCollectionVectorHideAway(0),
142 fCorrFctnCollection(0),
144 fFirstParticleCut(0),
145 fSecondParticleCut(0),
149 fNeventsProcessed(0),
150 fMinSizePartCollection(0)
153 //AliFemtoSimpleAnalysis();
154 fCorrFctnCollection = new AliFemtoCorrFctnCollection;
155 fMixingBuffer = new AliFemtoPicoEventCollection;
157 // find the right event cut
158 fEventCut = a.fEventCut->Clone();
159 // find the right first particle cut
160 fFirstParticleCut = a.fFirstParticleCut->Clone();
161 // find the right second particle cut
162 if (a.fFirstParticleCut==a.fSecondParticleCut)
163 SetSecondParticleCut(fFirstParticleCut); // identical particle hbt
165 fSecondParticleCut = a.fSecondParticleCut->Clone();
167 fPairCut = a.fPairCut->Clone();
170 SetEventCut(fEventCut); // this will set the myAnalysis pointer inside the cut
171 cout << " AliFemtoSimpleAnalysis::AliFemtoSimpleAnalysis(const AliFemtoSimpleAnalysis& a) - event cut set " << endl;
173 if ( fFirstParticleCut ) {
174 SetFirstParticleCut(fFirstParticleCut); // this will set the myAnalysis pointer inside the cut
175 cout << " AliFemtoSimpleAnalysis::AliFemtoSimpleAnalysis(const AliFemtoSimpleAnalysis& a) - first particle cut set " << endl;
177 if ( fSecondParticleCut ) {
178 SetSecondParticleCut(fSecondParticleCut); // this will set the myAnalysis pointer inside the cut
179 cout << " AliFemtoSimpleAnalysis::AliFemtoSimpleAnalysis(const AliFemtoSimpleAnalysis& a) - second particle cut set " << endl;
181 SetPairCut(fPairCut); // this will set the myAnalysis pointer inside the cut
182 cout << " AliFemtoSimpleAnalysis::AliFemtoSimpleAnalysis(const AliFemtoSimpleAnalysis& a) - pair cut set " << endl;
185 AliFemtoCorrFctnIterator iter;
186 for (iter=a.fCorrFctnCollection->begin(); iter!=a.fCorrFctnCollection->end();iter++){
187 cout << " AliFemtoSimpleAnalysis::AliFemtoSimpleAnalysis(const AliFemtoSimpleAnalysis& a) - looking for correlation functions " << endl;
188 AliFemtoCorrFctn* fctn = (*iter)->Clone();
189 if (fctn) AddCorrFctn(fctn);
190 else cout << " AliFemtoSimpleAnalysis::AliFemtoSimpleAnalysis(const AliFemtoSimpleAnalysis& a) - correlation function not found " << endl;
193 fNumEventsToMix = a.fNumEventsToMix;
195 fMinSizePartCollection = a.fMinSizePartCollection; // minimum # particles in ParticleCollection
197 cout << " AliFemtoSimpleAnalysis::AliFemtoSimpleAnalysis(const AliFemtoSimpleAnalysis& a) - analysis copied " << endl;
200 //____________________________
201 AliFemtoSimpleAnalysis::~AliFemtoSimpleAnalysis(){
203 cout << " AliFemtoSimpleAnalysis::~AliFemtoSimpleAnalysis()" << endl;
204 if (fEventCut) delete fEventCut; fEventCut=0;
205 if (fFirstParticleCut == fSecondParticleCut) fSecondParticleCut=0;
206 if (fFirstParticleCut) delete fFirstParticleCut; fFirstParticleCut=0;
207 if (fSecondParticleCut) delete fSecondParticleCut; fSecondParticleCut=0;
208 if (fPairCut) delete fPairCut; fPairCut=0;
209 // now delete every CorrFunction in the Collection, and then the Collection itself
210 AliFemtoCorrFctnIterator iter;
211 for (iter=fCorrFctnCollection->begin(); iter!=fCorrFctnCollection->end();iter++){
214 delete fCorrFctnCollection;
215 // now delete every PicoEvent in the EventMixingBuffer and then the Buffer itself
217 AliFemtoPicoEventIterator piter;
218 for (piter=fMixingBuffer->begin();piter!=fMixingBuffer->end();piter++){
221 delete fMixingBuffer;
224 //______________________
225 AliFemtoSimpleAnalysis& AliFemtoSimpleAnalysis::operator=(const AliFemtoSimpleAnalysis& aAna)
227 // Assignment operator
231 fCorrFctnCollection = new AliFemtoCorrFctnCollection;
232 fMixingBuffer = new AliFemtoPicoEventCollection;
234 // find the right event cut
235 fEventCut = aAna.fEventCut->Clone();
236 // find the right first particle cut
237 fFirstParticleCut = aAna.fFirstParticleCut->Clone();
238 // find the right second particle cut
239 if (aAna.fFirstParticleCut==aAna.fSecondParticleCut)
240 SetSecondParticleCut(fFirstParticleCut); // identical particle hbt
242 fSecondParticleCut = aAna.fSecondParticleCut->Clone();
244 fPairCut = aAna.fPairCut->Clone();
247 SetEventCut(fEventCut); // this will set the myAnalysis pointer inside the cut
248 cout << " AliFemtoSimpleAnalysis::AliFemtoSimpleAnalysis(const AliFemtoSimpleAnalysis& a) - event cut set " << endl;
250 if ( fFirstParticleCut ) {
251 SetFirstParticleCut(fFirstParticleCut); // this will set the myAnalysis pointer inside the cut
252 cout << " AliFemtoSimpleAnalysis::AliFemtoSimpleAnalysis(const AliFemtoSimpleAnalysis& a) - first particle cut set " << endl;
254 if ( fSecondParticleCut ) {
255 SetSecondParticleCut(fSecondParticleCut); // this will set the myAnalysis pointer inside the cut
256 cout << " AliFemtoSimpleAnalysis::AliFemtoSimpleAnalysis(const AliFemtoSimpleAnalysis& a) - second particle cut set " << endl;
258 SetPairCut(fPairCut); // this will set the myAnalysis pointer inside the cut
259 cout << " AliFemtoSimpleAnalysis::AliFemtoSimpleAnalysis(const AliFemtoSimpleAnalysis& a) - pair cut set " << endl;
262 AliFemtoCorrFctnIterator iter;
263 for (iter=aAna.fCorrFctnCollection->begin(); iter!=aAna.fCorrFctnCollection->end();iter++){
264 cout << " AliFemtoSimpleAnalysis::AliFemtoSimpleAnalysis(const AliFemtoSimpleAnalysis& a) - looking for correlation functions " << endl;
265 AliFemtoCorrFctn* fctn = (*iter)->Clone();
266 if (fctn) AddCorrFctn(fctn);
267 else cout << " AliFemtoSimpleAnalysis::AliFemtoSimpleAnalysis(const AliFemtoSimpleAnalysis& a) - correlation function not found " << endl;
270 fNumEventsToMix = aAna.fNumEventsToMix;
272 fMinSizePartCollection = aAna.fMinSizePartCollection; // minimum # particles in ParticleCollection
274 cout << " AliFemtoSimpleAnalysis::AliFemtoSimpleAnalysis(const AliFemtoSimpleAnalysis& a) - analysis copied " << endl;
278 //______________________
279 AliFemtoCorrFctn* AliFemtoSimpleAnalysis::CorrFctn(int n){
280 // return pointer to n-th correlation function
281 if ( n<0 || n > (int)fCorrFctnCollection->size() )
283 AliFemtoCorrFctnIterator iter=fCorrFctnCollection->begin();
284 for (int i=0; i<n ;i++){
289 //____________________________
290 AliFemtoString AliFemtoSimpleAnalysis::Report()
292 // Create a simple report from the analysis execution
293 cout << "AliFemtoSimpleAnalysis - constructing Report..."<<endl;
294 string temp = "-----------\nHbt Analysis Report:\n";
295 temp += "\nEvent Cuts:\n";
296 temp += fEventCut->Report();
297 temp += "\nParticle Cuts - First Particle:\n";
298 temp += fFirstParticleCut->Report();
299 temp += "\nParticle Cuts - Second Particle:\n";
300 temp += fSecondParticleCut->Report();
301 temp += "\nPair Cuts:\n";
302 temp += fPairCut->Report();
303 temp += "\nCorrelation Functions:\n";
304 AliFemtoCorrFctnIterator iter;
305 if ( fCorrFctnCollection->size()==0 ) {
306 cout << "AliFemtoSimpleAnalysis-Warning : no correlations functions in this analysis " << endl;
308 for (iter=fCorrFctnCollection->begin(); iter!=fCorrFctnCollection->end();iter++){
309 temp += (*iter)->Report();
312 temp += "-------------\n";
313 AliFemtoString returnThis=temp;
316 //_________________________
317 void AliFemtoSimpleAnalysis::ProcessEvent(const AliFemtoEvent* hbtEvent) {
318 // Add event to processed events
319 fPicoEvent=0; // we will get a new pico event, if not prevent corr. fctn to access old pico event
322 EventBegin(hbtEvent);
323 // event cut and event cut monitor
324 bool tmpPassEvent = fEventCut->Pass(hbtEvent);
325 fEventCut->FillCutMonitor(hbtEvent, tmpPassEvent);
327 cout << "AliFemtoSimpleAnalysis::ProcessEvent() - Event has passed cut - build picoEvent from " <<
328 hbtEvent->TrackCollection()->size() << " tracks in TrackCollection" << endl;
329 // OK, analysis likes the event-- build a pico event from it, using tracks the analysis likes...
330 fPicoEvent = new AliFemtoPicoEvent; // this is what we will make pairs from and put in Mixing Buffer
331 // no memory leak. we will delete picoevents when they come out of the mixing buffer
332 FillHbtParticleCollection(fFirstParticleCut,(AliFemtoEvent*)hbtEvent,fPicoEvent->FirstParticleCollection());
333 if ( !(AnalyzeIdenticalParticles()) )
334 FillHbtParticleCollection(fSecondParticleCut,(AliFemtoEvent*)hbtEvent,fPicoEvent->SecondParticleCollection());
335 cout <<"AliFemtoSimpleAnalysis::ProcessEvent - #particles in First, Second Collections: " <<
336 fPicoEvent->FirstParticleCollection()->size() << " " <<
337 fPicoEvent->SecondParticleCollection()->size() << endl;
339 // mal - implement a switch which allows only using events with ParticleCollections containing a minimum
340 // number of entries (jun2002)
341 if ((fPicoEvent->FirstParticleCollection()->size() >= fMinSizePartCollection )
342 && ( AnalyzeIdenticalParticles() || (fPicoEvent->SecondParticleCollection()->size() >= fMinSizePartCollection ))) {
345 //------------------------------------------------------------------------------
346 // Temporary comment:
347 // This whole section rewritten so that all pairs are built using the
348 // same code... easier to read and manage, and MakePairs() can be called by
349 // derived classes. Also, the requirement of a full mixing buffer before
350 // mixing is removed.
351 // Dan Magestro, 11/2002
353 //------ Make real pairs. If identical, make pairs for one collection ------//
355 if (AnalyzeIdenticalParticles()) {
356 MakePairs("real", fPicoEvent->FirstParticleCollection() );
359 MakePairs("real", fPicoEvent->FirstParticleCollection(),
360 fPicoEvent->SecondParticleCollection() );
362 cout << "AliFemtoSimpleAnalysis::ProcessEvent() - reals done ";
364 //---- Make pairs for mixed events, looping over events in mixingBuffer ----//
366 AliFemtoPicoEvent* storedEvent;
367 AliFemtoPicoEventIterator fPicoEventIter;
368 for (fPicoEventIter=MixingBuffer()->begin();fPicoEventIter!=MixingBuffer()->end();fPicoEventIter++){
369 storedEvent = *fPicoEventIter;
370 if (AnalyzeIdenticalParticles()) {
371 MakePairs("mixed",fPicoEvent->FirstParticleCollection(),
372 storedEvent->FirstParticleCollection() );
375 MakePairs("mixed",fPicoEvent->FirstParticleCollection(),
376 storedEvent->SecondParticleCollection() );
378 MakePairs("mixed",storedEvent->FirstParticleCollection(),
379 fPicoEvent->SecondParticleCollection() );
382 cout << " - mixed done " << endl;
384 //--------- If mixing buffer is full, delete oldest event ---------//
386 if ( MixingBufferFull() ) {
387 delete MixingBuffer()->back();
388 MixingBuffer()->pop_back();
391 //-------- Add current event (fPicoEvent) to mixing buffer --------//
393 MixingBuffer()->push_front(fPicoEvent);
396 // Temporary comment: End of rewritten section... Dan Magestro, 11/2002
397 //------------------------------------------------------------------------------
400 } // if ParticleCollections are big enough (mal jun2002)
404 } // if currentEvent is accepted by currentAnalysis
405 EventEnd(hbtEvent); // cleanup for EbyE
406 //cout << "AliFemtoSimpleAnalysis::ProcessEvent() - return to caller ... " << endl;
408 //_________________________
409 void AliFemtoSimpleAnalysis::MakePairs(const char* typeIn, AliFemtoParticleCollection *partCollection1,
410 AliFemtoParticleCollection *partCollection2){
411 // Build pairs, check pair cuts, and call CFs' AddRealPair() or
412 // AddMixedPair() methods. If no second particle collection is
413 // specfied, make pairs within first particle collection.
415 string type = typeIn;
417 AliFemtoPair* tPair = new AliFemtoPair;
419 AliFemtoCorrFctnIterator tCorrFctnIter;
421 AliFemtoParticleIterator tPartIter1, tPartIter2;
423 AliFemtoParticleIterator tStartOuterLoop = partCollection1->begin(); // always
424 AliFemtoParticleIterator tEndOuterLoop = partCollection1->end(); // will be one less if identical
425 AliFemtoParticleIterator tStartInnerLoop;
426 AliFemtoParticleIterator tEndInnerLoop;
427 if (partCollection2) { // Two collections:
428 tStartInnerLoop = partCollection2->begin(); // Full inner & outer loops
429 tEndInnerLoop = partCollection2->end(); //
431 else { // One collection:
432 tEndOuterLoop--; // Outer loop goes to next-to-last particle
433 tEndInnerLoop = partCollection1->end() ; // Inner loop goes to last particle
435 for (tPartIter1=tStartOuterLoop;tPartIter1!=tEndOuterLoop;tPartIter1++) {
436 if (!partCollection2){
437 tStartInnerLoop = tPartIter1;
440 tPair->SetTrack1(*tPartIter1);
441 for (tPartIter2 = tStartInnerLoop; tPartIter2!=tEndInnerLoop;tPartIter2++) {
442 tPair->SetTrack2(*tPartIter2);
444 // The following lines have to be uncommented if you want pairCutMonitors
445 // they are not in for speed reasons
446 // bool tmpPassPair = fPairCut->Pass(tPair);
447 // fPairCut->FillCutMonitor(tPair, tmpPassPair);
448 // if ( tmpPassPair )
450 //---- If pair passes cut, loop over CF's and add pair to real/mixed ----//
452 if (fPairCut->Pass(tPair)){
453 for (tCorrFctnIter=fCorrFctnCollection->begin();
454 tCorrFctnIter!=fCorrFctnCollection->end();tCorrFctnIter++){
455 AliFemtoCorrFctn* tCorrFctn = *tCorrFctnIter;
457 tCorrFctn->AddRealPair(tPair);
458 else if(type == "mixed")
459 tCorrFctn->AddMixedPair(tPair);
461 cout << "Problem with pair type, type = " << type.c_str() << endl;
465 } // loop over second particle
467 } // loop over first particle
472 //_________________________
473 void AliFemtoSimpleAnalysis::EventBegin(const AliFemtoEvent* ev){
474 // Perform initialization operations at the beginning of the event processing
475 //cout << " AliFemtoSimpleAnalysis::EventBegin(const AliFemtoEvent* ev) " << endl;
476 fFirstParticleCut->EventBegin(ev);
477 fSecondParticleCut->EventBegin(ev);
478 fPairCut->EventBegin(ev);
479 for (AliFemtoCorrFctnIterator iter=fCorrFctnCollection->begin(); iter!=fCorrFctnCollection->end();iter++){
480 (*iter)->EventBegin(ev);
483 //_________________________
484 void AliFemtoSimpleAnalysis::EventEnd(const AliFemtoEvent* ev){
485 // Fiinsh operations at the end of event processing
486 fFirstParticleCut->EventEnd(ev);
487 fSecondParticleCut->EventEnd(ev);
488 fPairCut->EventEnd(ev);
489 for (AliFemtoCorrFctnIterator iter=fCorrFctnCollection->begin(); iter!=fCorrFctnCollection->end();iter++){
490 (*iter)->EventEnd(ev);
493 //_________________________
494 void AliFemtoSimpleAnalysis::Finish(){
495 // Perform finishing operations after all events are processed
496 AliFemtoCorrFctnIterator iter;
497 for (iter=fCorrFctnCollection->begin(); iter!=fCorrFctnCollection->end();iter++){
501 //_________________________
502 void AliFemtoSimpleAnalysis::AddEventProcessed() {
503 // Increase count of processed events
506 //_________________________
507 TList* AliFemtoSimpleAnalysis::ListSettings()
509 // Collect settings list
510 TList *tListSettings = new TList();
512 TList *p1Cut = fFirstParticleCut->ListSettings();
514 TListIter nextp1(p1Cut);
515 while (TObject *obj = nextp1.Next()) {
516 TString cuts(obj->GetName());
517 cuts.Prepend("AliFemtoSimpleAnalysis.");
518 tListSettings->Add(new TObjString(cuts.Data()));
521 if (fSecondParticleCut != fFirstParticleCut) {
522 TList *p2Cut = fSecondParticleCut->ListSettings();
525 while (TObject *obj = nextp2()) {
526 TString cuts(obj->GetName());
527 cuts.Prepend("AliFemtoSimpleAnalysis.");
528 tListSettings->Add(new TObjString(cuts.Data()));
532 TList *pairCut = fPairCut->ListSettings();
534 TIter nextpair(pairCut);
535 while (TObject *obj = nextpair()) {
536 TString cuts(obj->GetName());
537 cuts.Prepend("AliFemtoSimpleAnalysis.");
538 tListSettings->Add(new TObjString(cuts.Data()));
541 return tListSettings;
545 //_________________________
546 TList* AliFemtoSimpleAnalysis::GetOutputList()
548 // Collect the list of output objects
550 TList *tOutputList = new TList();
552 TList *p1Cut = fFirstParticleCut->GetOutputList();
554 TListIter nextp1(p1Cut);
555 while (TObject *obj = nextp1.Next()) {
556 tOutputList->Add(obj);
559 if (fSecondParticleCut != fFirstParticleCut) {
560 TList *p2Cut = fSecondParticleCut->GetOutputList();
563 while (TObject *obj = nextp2()) {
564 tOutputList->Add(obj);
568 TList *pairCut = fPairCut->GetOutputList();
570 TIter nextpair(pairCut);
571 while (TObject *obj = nextpair()) {
572 tOutputList->Add(obj);
575 AliFemtoCorrFctnIterator iter;
576 for (iter=fCorrFctnCollection->begin(); iter!=fCorrFctnCollection->end();iter++){
577 TList *tListCf = (*iter)->GetOutputList();
579 TIter nextListCf(tListCf);
580 while (TObject *obj = nextListCf()) {
581 tOutputList->Add(obj);