search for: trec

Hello, I still can't figure out why my users' passwords are expiring. Ever since we switched to LDAP, passwords expire every 14 days. Here is an example LDAP user entry: version: 1 # LDIF Export for: uid=sgoodrich,ou=Users,dc=trec,dc=us # Generated by phpLDAPadmin ( http://phpldapadmin.sourceforge.net/ ) on September 6, 2005 10:56 am # Server: TREC (localhost) # Search Scope: base # Search Filter: (objectClass=*) # Total Entries: 1 # Entry 1: uid=sgoodrich,ou=Users,dc=trec,dc=us dn: uid=sgoodrich,ou=Users,dc=trec,dc=us obje...

...ave permission to change your password" when they try to change it. sambaAcctFlags includes the X flag which I thought meant "don't expire passwords." The password changing thing has got me even more stumped. Can anyone offer any clues? /etc/pam_ldap.conf: host localhost base dc=trec,dc=us ldap_version 3 rootbinddn cn=admin,dc=trec,dc=us pam_password exop /etc/libnss-ldap.conf: host localhost base dc=trec,dc=us ldap_version 3 rootbinddn cn=admin,dc=trec,dc=us pam_password exop Example user entry: dn: uid=sgoodrich,ou=Users,dc=trec,dc=us objectClass: top,inetOrgPerson,posixAc...

...h larger than avdl. It is mentioned in the paper that "the MAP improvements of BM25+ over BM25 are much larger on Web collections than on the news collection. In particular, the MAP improvements on all Web collections are statistically significant." Therefore, they seem to have used four TREC collections: WT2G, WT10G, Terabyte, and Robust04, which represent different sizes and genre of text collections. > Is this pure Dirichlet, or two-stage smoothing using Dir+ > versus Dir? What smoothing parameters were you using? That is pure Dirichlet vs Dir+ and sorry, I should have also u...

Ah. If FIRE doesn't have something that can show this suitably, then > maybe Parth can advise on access to TREC, as I know he's used some of > them in the past. > ?I can say FIRE is also a reliable source but INEX/TREC are better. INEX can give you free access and TREC is not freely available. I had used INEX for xapian in the past and some details are here: https://trac.xapian.org/wiki/GSoC2011/...

Hi, We''re using Ferret 0.9.4 and we''ve observed the following behavior. Searching for ''fieldname: foo and bar'' works fine while ''fieldname: "foo and bar"'' doesn''t return any results. Is there a way to make ferret recognize the ''and'' inside the query as a search term and not an operator? (I hope I got the

Hi all, I have completed almost all the suggested and pending changes to the evaluation module.Now module use Term Generator,Query Parser to index , form query object instead of modules from Trec harness code, have flexibility for user to change Weighing scheme and enable bi-gram from configuration itself. After switching the indexing and query object to term generator and query parser precision of the system have drastically increased .So problem of precision was due to outdated modules o...

...This is for the 3.0 release, and not part of the 2.x tree. I am the TMail maintainer and I decided this year to write a ruby email handler, the Mail gem is my solution to this. Mail takes a very object oriented approach to email. It conforms to RFCs as closely as practical and parses the 0.5gb Trec and 2.5Gb Enron email/spam database (about 500,000 emails) without crashing. Anyone who has used TMail will appreciate things Mail does and you should not have too much trouble moving over. The only thing you need to keep in mind is that in mail, everything is an object, so you have to call :to_s...

...This is for the 3.0 release, and not part of the 2.x tree. I am the TMail maintainer and I decided this year to write a ruby email handler, the Mail gem is my solution to this. Mail takes a very object oriented approach to email. It conforms to RFCs as closely as practical and parses the 0.5gb Trec and 2.5Gb Enron email/spam database (about 500,000 emails) without crashing. Anyone who has used TMail will appreciate things Mail does and you should not have too much trouble moving over. The only thing you need to keep in mind is that in mail, everything is an object, so you have to call :to_s...

...t using an unweighted directed graph of terms. This representation can be further used to define a new weighting scheme, *TW-IDF* (TW = Term Weight , IDF = Inverse Document Frequency) which *significantly outperforms* *TF-IDF *&* BM25* and in some cases its extension *BM25+* on various standard TREC datasets. This effectiveness is not achieved at the cost of its efficiency. It is confirmed by various experiments shown in [2]. The papers which I have referred for the above are :- [1] https://www.researchgate.net/publication/220479875_Graph -based_term_weighting_for_information_retrieval [2] ht...

Hi Parth, I implemented DFR algorithms in Xapian as a part of GSOC last year under the mentorship of Olly. This year, I want to work on analyzing and optimizing the performance of the DFR algorithms and comparing them with BM25.I also want to work on profiling the query expansion schemes and test the relevance(precision and recall) / speed(time taken) of the

We are equally excited about working with you over summer. I think you missed reply by Olly on IRC, you can find it in logs here: https://botbot.me/freenode/xapian/2018-04-24/?msg=99336093&page=1 - olly icebyte[m]: i think that probably needs to go through SFC ( https://sfconservancy.org/) as the "legal entity" - 2:05 am

...hin cluster measures, but there may be other techniques. (Also, I don't know if you have access to any pre-clustered test data, which would allow you to calculate a precision rate.) It's also going to be important to carefully choose the test data you use for this. Is there anything in the TREC collections that would be suitable? > July 28 - August 1: > Find out drawbacks that may come out while testing the proposed solution > and tackle it during this time by changing some parts of the code that may > increase speed or efficiency. It's good to have a period to incorpora...

...er named DFR schemes will be easier to implement because their forumlas are quite simpler compared to PL2 . Will send in a pull request in a couple of days once I'm done with the tests and the documentation. I'll now start working on the DPH scheme as described in Section 3 here:- http://trec.nist.gov/pubs/trec18/papers/uglasgow.BLOG.ENT.MQ.RF.WEB.pdf Now that GSOC is coming near,I want to start working on my proposal to make it as detailed as possible and my aim is to implement document weighting and query expansion using the DFR Framework(currently,we have a hard coded formula for q...

I am developping a personal/desktop search tool for which I am experimenting with doing no stemming during the indexing, but instead having a stem database (or several for different languages), used for expanding the query terms at search time. (ie: user query: flooring -> stem: floor -> final query for: [floored flooring floorings floors]) I have thought of a possible problem with

Hi all, I have evaluated new weighting schemes along with their existing counterparts in Xapian to compare and see which one does better job. Also, I have put together all the results files for easy access here: https://github.com/ivmarkp/xapian-evaluation/tree/evaluation/run and a README for getting started with xapian-evaluation module. Hopefully, it might be of help to those who are new to

...: The evaluation metric widely used in literature are alpha-NDCG [4] and ERR-IA [5]. These are also among the metrics used by the main paper [2], thus allowing for direct comparison with the author's results. The data set corpus used in the literature the most is ClueWeb09 with queries from TREC 2009/2010 diversification task. The problem is that both these are not freely available. For implementation, I'd like to implement alpha-NDCG and if time persists then ERR-IA. Please let me know what you think, any kind of feedback is appreciated. [1] Search Result Diversification Santos et...

Hi, Evaluation of pivoted normalization ("PPP") of tf-idf weighting scheme is also complete now. I have also evaluated the default tf-idf normalization ("ntn") and other normalizations combinations involving pivoted normalization in wdfn, idfn and wtn component as "Pxx", "xPx" and "xxP" normalization strings respectively to have a clear idea about

On Mon, Mar 07, 2016 at 01:36:43AM +0530, Richhiey Thomas wrote: > My questions are: > 1) Can you direct me on how to convert this raw idea into a proposal in > context to Xapian with more detail? What areas do I focus on? Our GSoC guide has an application template <https://trac.xapian.org/wiki/GSoCApplicationTemplate> which you should use to structure your proposal. It has some

I am using 0.99.10.7-1 on Debian, and I'm having some trouble with SSL. I purchased a certificate from Thawte and I can't figure out how to tell dovecot about the CA cert. Adding ssl_ca_file to my configuration produces "Unknown setting: ssl_ca_file" on dovecot startup. Postfix has a smtpd_tls_CAfile argument and that part is working fine. Is this a Debian-specific problem or

I am very fond of Dovecot, but it would be nice to have a more useful SSL implementation. When do you think we'll see a non-beta version that supports ssl_ca_file? I am running 0.99.11-3 from Debian testing. -- Jacob Elder