Search results for "spam"

Hits ?▲	Authors	Title	Venue	Year	Link	Author keywords
5	Beatrice Cynthia Dhinakaran, Dhinaharan Nagamalai, Jae-Kwang Lee	Bayesian Approach Based Comment Spam Defending Tool.	ISA	2009	DBLP DOI BibTeX RDF	comment spam, blog spam, spam, Bayesian Algorithm
5	Guanggang Geng, Qiudan Li, Xinchang Zhang	Link based small sample learning for web spam detection.	WWW	2009	DBLP DOI BibTeX RDF	content spam, machine learning, web spam, link spam
5	Guanggang Geng, Chunheng Wang, Qiudan Li	Improving web spam detection with re-extracted features.	WWW	2008	DBLP DOI BibTeX RDF	content spam, machine learning, web spam, link spam
5	Pedram Hayati, Vidyasagar Potdar	Evaluation of spam detection and prevention frameworks for email and image spam: a state of art.	iiWAS	2008	DBLP DOI BibTeX RDF	email spam, spam, image spam
5	Carlos Castillo, Debora Donato, Aristides Gionis, Vanessa Murdock, Fabrizio Silvestri	Know your neighbors: web spam detection using the web topology.	SIGIR	2007	DBLP DOI BibTeX RDF	content spam, web spam, link spam
4	Tiago A. Almeida, Akebo Yamakami, Jurandy Almeida	Probabilistic anti-spam filtering with dimensionality reduction.	SAC	2010	DBLP DOI BibTeX RDF	anti-spam filtering, naive Bayes anti-spam filter, terms selection technique, dimensionality reduction
4	Juan Martinez-Romo, Lourdes Araujo	Web spam identification through language model analysis.	AIRWeb	2009	DBLP DOI BibTeX RDF	content spam, language model approach, web spam
4	Na Dai, Brian D. Davison, Xiaoguang Qi	Looking into the past to better classify web spam.	AIRWeb	2009	DBLP DOI BibTeX RDF	archival web, search engine spam, spam classification, temporal features
4	Ronald Bhuleskar, Anoop Sherlekar, Anala Pandit	Hybrid Spam E-mail Filtering.	CICSyN	2009	DBLP DOI BibTeX RDF	HSF, spam coefficient, legitimate coefficient, whitelist, forging, spam mean, Self Improvisation, self learning technique, Filter, Filtering, Spam, Email, Hybrid, content based filtering, Parallel model, blacklist
4	Gökhan Dalkiliç, Devrim Sipahi, Mehmet Hilal Ozcanhan	A simple yet effective spam blocking method.	SIN	2009	DBLP DOI BibTeX RDF	SPF, spam blocking, spam
4	Jakub Piskorski, Marcin Sydow, Dawid Weiss	Exploring linguistic features for web spam detection: a preliminary study.	AIRWeb	2008	DBLP DOI BibTeX RDF	content features, web spam detection, web spam, linguistic features
4	Nitin Jindal, Bing Liu 0001	Opinion spam and analysis.	WSDM	2008	DBLP DOI BibTeX RDF	fake reviews, opinion spam, review analysis, review spam
4	Francesco Gargiulo, Antonio Penta, Antonio Picariello, Carlo Sansone	Using Heterogeneous Features for Anti-spam Filters.	DEXA Workshops	2008	DBLP DOI BibTeX RDF	lsa application, spam fusion classifier, image spam
4	Paul Heymann, Georgia Koutrika, Hector Garcia-Molina	Fighting Spam on Social Web Sites: A Survey of Approaches and Future Challenges.	IEEE Internet Computing	2007	DBLP DOI BibTeX RDF	social Web sites, spam countermeasures, social media, spam, resource sharing, social search
4	Nitin Jindal, Bing Liu 0001	Review spam detection.	WWW	2007	DBLP DOI BibTeX RDF	opinion spam, review spam, product reviews
4	Yi-Min Wang, Ming Ma, Yuan Niu, Hao Chen	Spam double-funnel: connecting web spammers with advertisers.	WWW	2007	DBLP DOI BibTeX RDF	advertisement syndication, redirection and cloaking, search spam, web spam
4	Gordon V. Cormack, José María Gómez Hidalgo, Enrique Puertas Sanz	Feature engineering for mobile (SMS) spam filtering.	SIGIR	2007	DBLP DOI BibTeX RDF	mobile spam, SMS, spam filtering, TREC, ROC analysis
4	Douglas Brewer, Sujeeth Thirumalai, Karthik Gomadam, Kang Li	Towards an Ontology Driven Spam Filter.	ICDE Workshops	2006	DBLP DOI BibTeX RDF	Ontology, Spam, spam filter
4	Ming-Wei Wu, Yennun Huang, Shyue-Kung Lu, Ing-Yi Chen, Sy-Yen Kuo	A Multi-Faceted Approach towards Spam-Resistible Mail.	PRDC	2005	DBLP DOI BibTeX RDF	anti-spam, unsolicited bulk e-mail (UBE), e-mail dependability, Spam, denial of service attacks
3	Fernando Sanchez, Zhenhai Duan, Yingfei Dong	Blocking spam by separating end-user machines from legitimate mail server machines.	CEAS	2011	DBLP DOI BibTeX RDF
3	Guangchen Ruan, Ying Tan	A three-layer back-propagation neural network for spam detection using artificial immune concentration.	Soft Comput.	2010	DBLP DOI BibTeX RDF	Neural networks, Artificial Immune System, Concentration, Feature construction, Spam detection
3	Young-joo Chung, Masashi Toyoda, Masaru Kitsuregawa	Identifying spam link generators for monitoring emerging web spam.	WICOW	2010	DBLP DOI BibTeX RDF	information retrieval, link analysis, web spam
3	Farida Ridzuan, Vidyasagar Potdar, Alex Talevski, William F. Smyth	Key Parameters in Identifying Cost of Spam 2.0.	AINA	2010	DBLP DOI BibTeX RDF	cost of spam, web spam
3	Jöran Beel, Bela Gipp	On the robustness of google scholar against spam.	HT	2010	DBLP DOI BibTeX RDF	academic search engines, citation spam, spamdexing, search engines, spam
3	Mona Mojdeh, Gordon V. Cormack	Semi-supervised spam filtering using aggressive consistency learning.	SIGIR	2010	DBLP DOI BibTeX RDF	classification, filtering, spam, email
3	Haoliang Qi, Muyun Yang, Xiaoning He, Sheng Li	Re-examination on lam% in spam filtering.	SIGIR	2010	DBLP DOI BibTeX RDF	lam, measurement, spam filtering
3	Wuying Liu, Ting Wang	Multi-field learning for email spam filtering.	SIGIR	2010	DBLP DOI BibTeX RDF	multi-field learning, text feature selection, spam filtering
3	Jungsuk Song, Daisuke Inoue, Masashi Eto, Hyung Chan Kim, Koji Nakao	An Empirical Study of Spam : Analyzing Spam Sending Systems and Malicious Web Servers.	SAINT	2010	DBLP DOI BibTeX RDF	spam sending systems, malicious Web servers, clustering, spam
3	Tiago A. Almeida, Akebo Yamakami, Jurandy Almeida	Filtering spams using the minimum description length principle.	SAC	2010	DBLP DOI BibTeX RDF	anti-spam filtering, machine learning, minimum description length, spam filter
3	Chih-Hung Wu, Chiung-Hui Tsai	Robust classification for spam filtering by back-propagation neural networks using behavior-based features.	Appl. Intell.	2009	DBLP DOI BibTeX RDF	Spam e-mails, Neural networks, Machine learning, Classification, Back-propagation
3	Bin Zhou 0002, Jian Pei	Link spam target detection using page farms.	TKDD	2009	DBLP DOI BibTeX RDF	Page Farm, PageRank, Link Spam
3	Esteban J. Palomo, Enrique Domínguez, Rafael Marcos Luque, José Muñoz	Spam Detection Based on a Hierarchical Self-Organizing Map.	ICIC	2009	DBLP DOI BibTeX RDF	hierarchical self-organization, Data clustering, spam detection
3	Ola Amayri, Nizar Bouguila	Improved Online Support Vector Machines Spam Filtering Using String Kernels.	CIARP	2009	DBLP DOI BibTeX RDF	Online Active, Support Vector Machines, Spam, String Kernels, Feature Mapping
3	Nicolas Neubauer, Robert Wetzker, Klaus Obermayer	Tag spam creates large non-giant connected components.	AIRWeb	2009	DBLP DOI BibTeX RDF	tagging, connected components, spam detection
3	Miklós Erdélyi, András A. Benczúr, Julien Masanès, Dávid Siklósi	Web spam filtering in internet archives.	AIRWeb	2009	DBLP DOI BibTeX RDF	information retrieval, time series analysis, document classification, web archival, web spam
3	András A. Benczúr, Miklós Erdélyi, Julien Masanès, Dávid Siklósi	Web spam challenge proposal for filtering in archives.	AIRWeb	2009	DBLP DOI BibTeX RDF	information retrieval, evaluation, document classification, challenge, web archival, web spam
3	Timothy Jones, Ramesh S. Sankaranarayana, David Hawking, Nick Craswell	Nullification test collections for web spam and SEO.	AIRWeb	2009	DBLP DOI BibTeX RDF	evaluation, test collections, web spam
3	István Bíró, Dávid Siklósi, Jácint Szabó, András A. Benczúr	Linked latent Dirichlet allocation in web spam filtering.	AIRWeb	2009	DBLP DOI BibTeX RDF	web content spam, information retrieval, feature selection, latent Dirichlet allocation, document classification, text analysis
3	Benjamin Markines, Ciro Cattuto, Filippo Menczer	Social spam detection.	AIRWeb	2009	DBLP DOI BibTeX RDF	social spam, tag similarity, web 2.0, annotations, tag, resource, post
3	Chengcui Zhang, Wei-bang Chen, Xin Chen, Gary Warner	Revealing common sources of image spam by unsupervised clustering with visual features.	SAC	2009	DBLP DOI BibTeX RDF	clustering, computer forensics, botnet, image spam
3	Seongwook Youn, Dennis McLeod	Spam decisions on gray e-mail using personalized ontologies.	SAC	2009	DBLP DOI BibTeX RDF	gray e-mail, ontologies, feature selection, spam filtering, e-mail classification
3	Chun Wei, Alan Sprague, Gary Warner	Clustering malware-generated spam emails with a novel fuzzy string matching algorithm.	SAC	2009	DBLP DOI BibTeX RDF	data mining, spam, electronic mail, forensics, cyber crime
3	Seongwook Youn, Dennis McLeod	Improved spam filtering by extraction of information from text embedded image e-mail.	SAC	2009	DBLP DOI BibTeX RDF	ontology, feature selection, OCR, spam filtering, e-mail classification
3	Haiqiang Zuo, Weiming Hu, Ou Wu, Yunfei Chen, Guan Luo	Detecting image spam using local invariant features and pyramid match kernel.	WWW	2009	DBLP DOI BibTeX RDF	local invariant features, pyramid match kernel, image spam
3	Huijia Yu, Yiqun Liu, Min Zhang, Liyun Ru, Shaoping Ma	Web Spam Identification with User Browsing Graph.	AIRS	2009	DBLP DOI BibTeX RDF	Spam identification, TrustRank, User browsing graph
3	Jeongkyu Shin, Seunghwan Kim	Spam Source Clustering by Constructing Spammer Network with Correlation Measure.	Complex	2009	DBLP DOI BibTeX RDF	Electronic spam, complex network, clustering method
3	Pattaraporn Klangpraphant, Pattarasinee Bhattarakosol	e-mail authentication system: a spam filtering for smart senders.	Int. Conf. Interaction Sciences	2009	DBLP DOI BibTeX RDF	green mail, malicious e-mails, aspects, spam filtering
3	Craig Macdonald, Iadh Ounis, Ian Soboroff	Is spam an issue for opinionated blog post search?	SIGIR	2009	DBLP DOI BibTeX RDF	opinion-finding, splogs, blogs, spam
3	Gordon V. Cormack, Jose-Marcio Martins da Cruz	On the relative age of spam and ham training samples for email filtering.	SIGIR	2009	DBLP DOI BibTeX RDF	training, filtering, spam, email
3	Gordon V. Cormack, Aleksander Kolcz	Spam filter evaluation with imprecise ground truth.	SIGIR	2009	DBLP DOI BibTeX RDF	classification, filtering, noise, spam, email
3	Cheng Wang Xie, Lin Xin Ding, Xin Du	Anti-spam Filters Based on Support Vector Machines.	ISICA	2009	DBLP DOI BibTeX RDF	anti-spam, classification, support vector machines, filter
3	Kuldeep Singh, Audun Jøsang, Md. Sadek Ferdous, Ravishankar Borgaonkar	Spam filter optimality based on signal detection theory.	SIN	2009	DBLP DOI BibTeX RDF	signal detection theory (sdt)., optimality, filters, spam, e-mail, tradeoffs
3	Henriette S. M. Cramer, Vanessa Evers, Maarten van Someren, Bob J. Wielinga	Awareness, training and trust in interaction with adaptive spam filters.	CHI	2009	DBLP DOI BibTeX RDF	trainable systems, adaptivity, filters, spam, autonomy
3	Jinlong Wang, Ke Gao, Yang Jiao, Gang Li	Study on Ensemble Classification Methods towards Spam Filtering.	ADMA	2009	DBLP DOI BibTeX RDF	spam email filtering, classification, ensemble
3	Juho Heikkilä, Andrei Gurtov	Filtering SPAM in P2PSIP Communities with Web of Trust.	MobiSec	2009	DBLP DOI BibTeX RDF	spam prevention, p2p, social networking, trust
3	Abhinav Pathak, Feng Qian, Y. Charlie Hu, Zhuoqing Morley Mao, Supranamaya Ranjan	Botnet spam campaigns can be long lasting: evidence, implications, and analysis.	SIGMETRICS/Performance	2009	DBLP DOI BibTeX RDF	distributedness, open relay, spam campaign, botnet, burstiness
3	Feilong Chen, Pang-Ning Tan, Anil K. Jain	A co-classification framework for detecting web spam and spammers in social media web sites.	CIKM	2009	DBLP DOI BibTeX RDF	classification, social media, web spam
3	Deepak Chinavle, Pranam Kolari, Tim Oates, Tim Finin	Ensembles in adversarial classification for spam.	CIKM	2009	DBLP DOI BibTeX RDF	adversarial classification, retraining, spam, ensembles, weblogs, nonstationarity
3	Elena Zheleva, Aleksander Kolcz, Lise Getoor	Trusting spam reporters: A reporter-based reputation system for email filtering.	ACM Trans. Inf. Syst.	2008	DBLP DOI BibTeX RDF	trust, reputation systems, Spam filtering
3	Mengjun Xie, Heng Yin, Haining Wang	Thwarting E-mail Spam Laundering.	ACM Trans. Inf. Syst. Secur.	2008	DBLP DOI BibTeX RDF	SPRT, Spam, proxy
3	Georgia Koutrika, Frans Adjie Effendi, Zoltán Gyöngyi, Paul Heymann, Hector Garcia-Molina	Combating spam in tagging systems: An evaluation.	TWEB	2008	DBLP DOI BibTeX RDF	bookmarking systems, tag spam, tagging models, Tagging
3	Tanguy Urvoy, Emmanuel Chauveau, Pascal Filoche, Thomas Lavergne	Tracking Web spam with HTML style similarities.	TWEB	2008	DBLP DOI BibTeX RDF	search engine spam, templates identification, Clustering, document similarity, stylometry
3	Enrico Blanzieri, Anton Bryl	A survey of learning-based techniques of email spam filtering.	Artif. Intell. Rev.	2008	DBLP DOI BibTeX RDF	Machine learning, Spam filtering
3	Jacob Abernethy, Olivier Chapelle, Carlos Castillo	Web spam identification through content and hyperlinks.	AIRWeb	2008	DBLP DOI BibTeX RDF	support vector machines, web spam, graph regularization
3	Reid Andersen, Christian Borgs, Jennifer T. Chayes, John E. Hopcroft, Kamal Jain, Vahab S. Mirrokni, Shang-Hua Teng	Robust PageRank and locally computable spam detection features.	AIRWeb	2008	DBLP DOI BibTeX RDF	graph algorithms, unsupervised learning, directed graphs, PageRank, local algorithms, link spam
3	István Bíró, Jácint Szabó, András A. Benczúr	Latent dirichlet allocation in web spam filtering.	AIRWeb	2008	DBLP DOI BibTeX RDF	web content spam, information retrieval, feature selection, latent dirichlet allocation, document classification, text analysis
3	Yiqun Liu, Rongwei Cen, Min Zhang, Shaoping Ma, Liyun Ru	Identifying web spam with user behavior analysis.	AIRWeb	2008	DBLP DOI BibTeX RDF	web search engine, spam detection, user behavior analysis
3	Beate Krause, Christoph Schmitz, Andreas Hotho, Gerd Stumme	The anti-social tagger: detecting spam in social bookmarking systems.	AIRWeb	2008	DBLP DOI BibTeX RDF	web 2.0, folksonomy, spam detection
3	Jingtao Sun, Qiuyu Zhang, Zhanting Yuan, Wenhan Huang, Xiaowen Yan, Jianshe Dong	Research of Spam Filtering System Based on LSA and SHA.	ISNN	2008	DBLP DOI BibTeX RDF	Secure Hash Algorithm, Mail Characteristic ID, Slipping Windows, Latent Semantic Analysis, Spam Filtering
3	Chuanliang Chen, Yunchao Gong, Rongfang Bie, Xiao Zhi Gao	Searching for Interacting Features for Spam Filtering.	ISNN	2008	DBLP DOI BibTeX RDF	Interacting features, Naïve bayes, Feature selection, Spam filtering
3	Garrett Brown, Travis Howe, Micheal Ihbe, Atul Prakash, Kevin Borders	Social networks and context-aware spam.	CSCW	2008	DBLP DOI BibTeX RDF	privacy, social networks, spam, email, facebook
3	Chun Wei, Alan Sprague, Gary Warner, Anthony Skjellum	Mining spam email to identify common origins for forensic application.	SAC	2008	DBLP DOI BibTeX RDF	data mining, spam, electronic mail, forensic analysis, cyber crime
3	Yiqun Liu, Min Zhang, Shaoping Ma, Liyun Ru	User behavior oriented web spam detection.	WWW	2008	DBLP DOI BibTeX RDF	web search engine, spam detection, user behavior analysis
3	Bhaskar Mehta, Saurabh Nangia, Manish Gupta 0002, Wolfgang Nejdl	Detecting image spam using visual features and near duplicate detection.	WWW	2008	DBLP DOI BibTeX RDF	email spam, machine learning, image analysis
3	Kazunari Ishida	Extracting spam blogs with co-citation clusters.	WWW	2008	DBLP DOI BibTeX RDF	advertisement link, co-citation cluster, spam blog extraction
3	Toshihiko Takemura, Hiroyuki Ebara	Spam Mail Reduces Economic Effects.	ICDS	2008	DBLP DOI BibTeX RDF	spam mail, production function model, labor loss, negative economic effect
3	Wuying Liu, Ting Wang	Active Learning for Online Spam Filtering.	AIRS	2008	DBLP DOI BibTeX RDF	Machine Learning, SVM, Active Learning, Ensemble Learning, Spam Filtering
3	Mona Mojdeh, Gordon V. Cormack	Semi-supervised spam filtering: does it work?	SIGIR	2008	DBLP DOI BibTeX RDF	self-feedback, semi-supervised learning, spam, transductive learning
3	Peizhou He, Yong Sun, Wei Zheng, Xiangming Wen	Filtering Short Message Spam of Group Sending Using CAPTCHA.	WKDD	2008	DBLP DOI BibTeX RDF	SMS spam (short message service spam), group sending, CAPTCHA (Completely Automated Public Turing test to tell Computers and Human Apart), (OCR) Optical Character Recognition, user authentication
3	Saeed Abu-Nimeh, Dario Nappa, Xinlei Wang, Suku Nair	Bayesian Additive Regression Trees-Based Spam Detection for Enhanced Email Privacy.	ARES	2008	DBLP DOI BibTeX RDF	BART, NNet, classification, SVM, spam, logistic regression, random forests, CART
3	Chris Kanich, Christian Kreibich, Kirill Levchenko, Brandon Enright, Geoffrey M. Voelker, Vern Paxson, Stefan Savage	Spamalytics: an empirical analysis of spam marketing conversion.	ACM Conference on Computer and Communications Security	2008	DBLP DOI BibTeX RDF	unsolicited email, spam, conversion
3	Dongmei Jia, Wai Gen Yee, Ophir Frieder	Spam characterization and detection in peer-to-peer file-sharing systems.	CIKM	2008	DBLP DOI BibTeX RDF	spam, detection, characterization, p2p search
3	Linhong Zhu, Aixin Sun, Byron Choi	Online spam-blog detection through blog search.	CIKM	2008	DBLP DOI BibTeX RDF	spam blog detection
3	Steve Webb, James Caverlee, Calton Pu	Predicting web spam with HTTP session information.	CIKM	2008	DBLP DOI BibTeX RDF	HTTP session information, classification, web spam
3	Chi-Yao Tseng, Pin-Chieh Sung, Ming-Syan Chen	A novel email abstraction scheme for spam detection.	CIKM	2008	DBLP DOI BibTeX RDF	email abstraction, near-duplicate matching, spam detection
3	Dongmei Jia	Cost-effective spam detection in p2p file-sharing systems.	LSDS-IR	2008	DBLP DOI BibTeX RDF	spam, detection, p2p search
3	Ming-wei Chang, Wen-tau Yih, Christopher Meek	Partitioned logistic regression for spam filtering.	KDD	2008	DBLP DOI BibTeX RDF	email spam filtering, logistic regression, naive bayes
3	Carlos Castillo, Kumar Chellapilla, Dennis Fetterly	Fourth international workshop on adversarial information retrieval on the web (AIRWeb 2008).	WWW	2008	DBLP DOI BibTeX RDF	adversarial information retrieval, search engine spam, spamdexing, web spam
3	Xun Yue, Ajith Abraham, Zhong-Xian Chi, Yan-You Hao, Hongwei Mo	Artificial immune system inspired behavior-based anti-spam filter.	Soft Comput.	2007	DBLP DOI BibTeX RDF	Artificial immune system, Spam, Clustering algorithm, Artificial immune network
3	Gordon V. Cormack, Thomas R. Lynam	Online supervised spam filter evaluation.	ACM Trans. Inf. Syst.	2007	DBLP DOI BibTeX RDF	text classification, Spam, email
3	Claudine Brucks, Michael Hilker, Christoph Schommer, Cynthia Wagner, Ralph Weires	Semi-automated Content Zoning of Spam Emails.	WEBIST (Selected Papers)	2007	DBLP DOI BibTeX RDF	Content Zoning, Spam Email Detection, Text Analysis and Statistics, Human-Computer Interaction
3	Christopher Lueg, Sam Martin	Users dealing with spam and spam filters: some observations and recommendations.	CHINZ	2007	DBLP DOI BibTeX RDF	information retrieval, spam, electronic mail, information search, informative interfaces
3	Mukesh Dalal	Spam and popularity ratings for combating link spam.	WWW	2007	DBLP DOI BibTeX RDF	WWW, trust, search, web, PageRank, link spam, distrust
3	Ji-Soo Kim, S. H. Kim, H. J. Yang, H. J. Son, W. P. Kim	Text Extraction for Spam-Mail Image Filtering Using a Text Color Estimation Technique.	IEA/AIE	2007	DBLP DOI BibTeX RDF	Color Layer, Spam-mail Filtering, Text Extraction, Character Segmentation
3	Xin Zhang, Wenyuan Dai, Gui-Rong Xue, Yong Yu	Adaptive Email Spam Filtering Based on Information Theory.	WISE	2007	DBLP DOI BibTeX RDF	email spam, adaptive, information theory
3	Wei Wang 0033, Guosun Zeng, Mingjun Sun, Huanan Gu, Quan Zhang	EviRank: An Evidence Based Content Trust Model for Web Spam Detection.	APWeb/WAIM Workshops	2007	DBLP DOI BibTeX RDF	content trust, SVM, learning, ranking, evidence, web spam
3	D. Sculley, Gabriel Wachman	Relaxed online SVMs for spam filtering.	SIGIR	2007	DBLP DOI BibTeX RDF	splogs, support vector machines, blogs, spam filtering
3	Lan Nie, Baoning Wu, Brian D. Davison	Winnowing wheat from the chaff: propagating trust to sift spam from the web.	SIGIR	2007	DBLP DOI BibTeX RDF	trust, authority, spam, web search engine
3	Md. Rafiqul Islam, Wanlei Zhou	Architecture of Adaptive Spam Filtering Based on Machine Learning Algorithms.	ICA3PP	2007	DBLP DOI BibTeX RDF	NB, Machine learning, SVM, spam, FP
3	James Caverlee, Ling Liu	Countering web spam with credibility-based link analysis.	PODC	2007	DBLP DOI BibTeX RDF	web algorithms, link analysis, spam, PageRank, credibility