Search results

  • Conference contribution

    Mining genes in DNA using genescout

    Yin, M. M. & Wang, J., Dec 1 2002, Proceedings - 2002 IEEE International Conference on Data Mining, ICDM 2002. p. 733-736 4 p. (Proceedings - IEEE International Conference on Data Mining, ICDM).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • MobiStore: Achieving availability and load balance in a mobile P2P data store

    Khan, M. A., Yeh, L., Zeitouni, K. & Borcea, C., Jan 28 2015, Proceedings of the 2014 6th International Conference on Mobile Computing, Applications and Services, MobiCASE 2014. Institute of Electrical and Electronics Engineers Inc., p. 171-172 2 p. 7026295. (Proceedings of the 2014 6th International Conference on Mobile Computing, Applications and Services, MobiCASE 2014).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    6 Scopus citations
  • Model-based partial shape recognition using contour curvature and affine transformation

    Shih, F. Y. & Yeh, P., Dec 1 1990, Proc First Int Conf Syst Integr ICSI 90. Publ by IEEE, p. 294-301 8 p. (Proc First Int Conf Syst Integr ICSI 90).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Scopus citations
  • Modeling a vocabulary in an object-oriented database

    Liu, L. M., Halper, M., Gu, H. & Geller, J., Dec 1 1996, International Conference on Information and Knowledge Management, Proceedings. Barker, K. & Ozsu, M. T. (eds.). p. 179-188 10 p.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    10 Scopus citations
  • Modeling cybersecurity risks: Proof of concept of a holistic approach for integrated risk quantification

    Henshel, D., Alexeev, A., Cains, M., Rowe, J., Cam, H., Hoffman, B. & Neamtiu, I., Sep 14 2016, 2016 IEEE Symposium on Technologies for Homeland Security, HST 2016. Institute of Electrical and Electronics Engineers Inc., 7568937. (2016 IEEE Symposium on Technologies for Homeland Security, HST 2016).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3 Scopus citations
  • Modeling real estate for school district identification

    Tan, F., Cheng, C. & Wei, Z., Jan 31 2017, Proceedings - 16th IEEE International Conference on Data Mining, ICDM 2016. Bonchi, F., Wu, X., Baeza-Yates, R., Domingo-Ferrer, J. & Zhou, Z-H. (eds.). Institute of Electrical and Electronics Engineers Inc., p. 1227-1232 6 p. 7837977. (Proceedings - IEEE International Conference on Data Mining, ICDM).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    7 Scopus citations
  • Modeling redundancy: Quantitative and qualitative models

    Mili, A., Wu, L., Sheldon, F. T., Shereshevsky, M. & Desharnais, J., 2006, IEEE International Conference on Computer Systems and Applications, 2006. IEEE Computer Society, p. 1-8 8 p. 1618325. (IEEE International Conference on Computer Systems and Applications, 2006; vol. 2006).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Scopus citations
  • Modeling stakeholder/value dependency through mean failure cost

    Aissa, A. B., Abercrombie, R. K., Sheldon, F. T. & Mili, A., 2010, 6th Annual Cyber Security and Information Intelligence Research Workshop: Cyber Security and Information Intelligence Challenges and Strategies, CSIIRW10. 1852727. (ACM International Conference Proceeding Series).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    4 Scopus citations
  • Modeling the evolution of software engineering trends - A bottom up approach

    Rabai, L. B. A., Bai, Y. Z. & Mili, A., Dec 1 2009, ICSOFT 2009 - 4th International Conference on Software and Data Technologies, Proceedings. p. 47-54 8 p. (ICSOFT 2009 - 4th International Conference on Software and Data Technologies, Proceedings; vol. 1).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    2 Scopus citations
  • Moitree: A middleware for cloud-assisted mobile distributed apps

    Khan, M. A., Debnath, H., Paiker, N. R., Gehani, N., Ding, X., Curtmola, R. & Borcea, C., May 19 2016, Proceedings - 2016 4th IEEE International Conference on Mobile Cloud Computing, Services, and Engineering, MobileCloud 2016. Institute of Electrical and Electronics Engineers Inc., p. 21-30 10 p. 7474402. (Proceedings - 2016 4th IEEE International Conference on Mobile Cloud Computing, Services, and Engineering, MobileCloud 2016).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    18 Scopus citations
  • Monitoring public health concerns using twitter sentiment classifications

    Ji, X., Chun, S. A. & Geller, J., 2013, Proceedings - 2013 IEEE International Conference on Healthcare Informatics, ICHI 2013. p. 335-344 10 p. 6680494. (Proceedings - 2013 IEEE International Conference on Healthcare Informatics, ICHI 2013).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    59 Scopus citations
  • Monitoring software technology evolution, one trend at a time

    Bai, Y. & Mili, A., 2007, 16th International Conference on Software Engineering and Data Engineering, SEDE 2007. p. 349-355 7 p. (16th International Conference on Software Engineering and Data Engineering, SEDE 2007).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    2 Scopus citations
  • Monte Carlo estimation of economic capital

    Kaplan, Z. T., Li, Y. & Nakayama, M. K., Jan 31 2019, WSC 2018 - 2018 Winter Simulation Conference: Simulation for a Noble Cause. Institute of Electrical and Electronics Engineers Inc., p. 1754-1765 12 p. 8632308. (Proceedings - Winter Simulation Conference; vol. 2018-December).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • Morphological shape description using geometric spectrum on multidimensional binary images

    Shih, F. & Pu, C. C., Dec 1 1992, Proceedings of SPIE - The International Society for Optical Engineering. pt 2 ed. Publ by Int Soc for Optical Engineering, p. 907-918 12 p. (Proceedings of SPIE - The International Society for Optical Engineering; vol. 1818, no. pt 2).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • Motivation-Aware task assignment in crowdsourcing

    Pilourdault, J., Amer-Yahia, S., Lee, D. & Roy, S. B., 2017, Advances in Database Technology - EDBT 2017: 20th International Conference on Extending Database Technology, Proceedings. Mitschang, B., Markl, V., Bress, S., Andritsos, P., Sattler, K-U. & Orlando, S. (eds.). OpenProceedings.org, p. 246-257 12 p. (Advances in Database Technology - EDBT; vol. 2017-March).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    19 Scopus citations
  • Moving cast shadow detection in video based on new chromatic criteria and statistical modeling

    Shi, H. & Liu, C., Dec 2019, Proceedings - 18th IEEE International Conference on Machine Learning and Applications, ICMLA 2019. Wani, M. A., Khoshgoftaar, T. M., Wang, D., Wang, H. & Seliya, N. (eds.). Institute of Electrical and Electronics Engineers Inc., p. 196-201 6 p. 8999031. (Proceedings - 18th IEEE International Conference on Machine Learning and Applications, ICMLA 2019).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    5 Scopus citations
  • Multi-destination vehicular route planning with parking and traffic constraints

    Hakeem, A., Gehani, N., Ding, X., Curtmola, R. & Borcea, C., Nov 12 2019, Proceedings of the 16th EAI International Conference on Mobile and Ubiquitous Systems: Computing, Networking and Services, MobiQuitous 2019. Association for Computing Machinery, p. 298-307 10 p. (ACM International Conference Proceeding Series).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    6 Scopus citations
  • Multi-input Laconic Function Evaluation

    Pang, B., Chen, L., Fan, X. & Tang, Q., 2020, Information Security and Privacy - 25th Australasian Conference, ACISP 2020, Proceedings. Liu, J. K. & Cui, H. (eds.). Springer, p. 369-388 20 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 12248 LNCS).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • Multi-layer Big Knowledge Visualization Scheme for Comprehending Neoplasm Ontology Content

    Zheng, L., Ochs, C., Geller, J., Liu, H., Perl, Y. & Coronado, S. D., Aug 30 2017, Proceedings - 2017 IEEE International Conference on Big Knowledge, ICBK 2017. Lu, R., Wu, X., Ozsu, T., Wu, X. & Hendler, J. (eds.). Institute of Electrical and Electronics Engineers Inc., p. 127-134 8 p. 8023404. (Proceedings - 2017 IEEE International Conference on Big Knowledge, ICBK 2017).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Scopus citations
  • Multi-level index for global and partial content-based image retrieval

    Jomier, G., Manouvrier, M., Oria, V. & Rukoz, M., 2005, Proceedings - International Workshop on Biomedical Data Engineering, BMDE2005. 1647782. (Proceedings - International Workshop on Biomedical Data Engineering, BMDE2005; vol. 2005).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3 Scopus citations
  • Multi-path convolutional neural network for glioblastoma survival group prediction with point mutations and demographic features

    Aljouie, A. & Roshan, U., Nov 2019, Proceedings - 2019 IEEE International Conference on Bioinformatics and Biomedicine, BIBM 2019. Yoo, I., Bi, J. & Hu, X. T. (eds.). Institute of Electrical and Electronics Engineers Inc., p. 1274-1279 6 p. 8983109. (Proceedings - 2019 IEEE International Conference on Bioinformatics and Biomedicine, BIBM 2019).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Scopus citations
  • Multi-Path Routing for Maximum Bandwidth with K Edge-Disjoint Paths

    Wang, T., Wu, C. Q., Wang, Y., Hou, A. & Cao, H., Aug 28 2018, 2018 14th International Wireless Communications and Mobile Computing Conference, IWCMC 2018. Institute of Electrical and Electronics Engineers Inc., p. 1178-1183 6 p. 8450413. (2018 14th International Wireless Communications and Mobile Computing Conference, IWCMC 2018).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3 Scopus citations
  • Multiple Anthropological Fisher Kernel Framework and Its Application to Kinship Verification

    Puthenputhussery, A., Liu, Q. & Liu, C., May 3 2018, Proceedings - 2018 IEEE Winter Conference on Applications of Computer Vision, WACV 2018. Institute of Electrical and Electronics Engineers Inc., p. 57-65 9 p. 8354117. (Proceedings - 2018 IEEE Winter Conference on Applications of Computer Vision, WACV 2018; vol. 2018-January).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Scopus citations
  • Multi-session diversity to improve user satisfaction in web applications

    Esfandiari, M., Borromeo, R. M., Nikookar, S., Sakharkar, P., Amer-Yahia, S. & Basu Roy, S., Apr 19 2021, The Web Conference 2021 - Proceedings of the World Wide Web Conference, WWW 2021. Association for Computing Machinery, Inc, p. 1928-1936 9 p. (The Web Conference 2021 - Proceedings of the World Wide Web Conference, WWW 2021).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3 Scopus citations
  • Mutation Subsumption as Relative Incorrectness

    Khaireddine, B., Ayad, A., Marsit, I. & Mili, A., 2021, Quality of Information and Communications Technology - 14th International Conference, QUATIC 2021, Proceedings. Paiva, A. C. R., Cavalli, A. R., Ventura Martins, P. & Pérez-Castillo, R. (eds.). Springer Science and Business Media Deutschland GmbH, p. 18-28 11 p. (Communications in Computer and Information Science; vol. 1439 CCIS).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • Nearly logarithmic-time parallel algorithms for the class of ±2b ASCEND computations on a SIMD hypercube

    Nassimi, D., 1992, Proceedings of the International Conference on Parallel Processing. Publ by IEEE, p. 122-129 8 p. (Proceedings of the International Conference on Parallel Processing).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    2 Scopus citations
  • Network planning for heterogeneous wireless sensor networks in environmental survivability

    Machado, R., Zhang, W. & Wang, G., 2009, ICTAI 2009 - 21st IEEE International Conference on Tools with Artificial Intelligence. p. 814-821 8 p. 5366834. (Proceedings - International Conference on Tools with Artificial Intelligence, ICTAI).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    10 Scopus citations
  • Neural Architectures for Mathematical Morphology and Fuzzy Morphology

    Moh, J. & Shih, F., Dec 1 1994, Joint Conference on Information Sciences - Proceedings, Abstracts and Summaries, JCIS 94. p. 308-311 4 p.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • NJIT's Sandbox: An industry/education partnership for IT development

    Friedman, R., McHugh, J. A. M. & Deek, F. P., Oct 16 2003, Proceedings of the 4th Conference on Information Technology Curriculum, CITC4 2003. Association for Computing Machinery, Inc, p. 201-205 5 p. (Proceedings of the 4th Conference on Information Technology Curriculum, CITC4 2003).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    4 Scopus citations
  • Nn-descent on high-dimensional data

    Bratić, B., Houle, M. E., Kurbalija, V., Oria, V. & Radovanović, M., Jun 25 2018, WIMS 2018 - 8th International Conference on Web Intelligence, Mining and Semantics. Badica, C., Akerkar, R., Ivanovic, M., Savic, M., Radovanovic, M., Kim, S-W., Rosati, R. & Manolopoulos, Y. (eds.). Association for Computing Machinery, (ACM International Conference Proceeding Series).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    4 Scopus citations
  • Node reclamation and replacement for long-lived sensor networks

    Tong, B., Wang, G., Zhang, W. & Wang, C., Nov 20 2009, 2009 6th Annual IEEE Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks, SECON 2009. 5168950. (2009 6th Annual IEEE Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks, SECON 2009).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    17 Scopus citations
  • No slot wasting bandwidth balancing with immediate use of tar bit

    Karvelas, D. & Papamichail, M., Jan 1 1994, Conference Record - International Conference on Communications. Publ by IEEE, Vol. 2. p. 968-972 5 p.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • NoStop: A Novel Configuration Optimization Scheme for Spark Streaming

    Ye, Q., Liu, W. & Wu, C. Q., Aug 9 2021, 50th International Conference on Parallel Processing, ICPP 2021 - Main Conference Proceedings. Association for Computing Machinery, (ACM International Conference Proceeding Series).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • Novel color, shape and texture-based scene image descriptors

    Banerji, S., Sinha, A. & Liu, C., Dec 31 2012, Proceedings - 2012 IEEE 8th International Conference on Intelligent Computer Communication and Processing, ICCP 2012. p. 245-248 4 p. 6356193. (Proceedings - 2012 IEEE 8th International Conference on Intelligent Computer Communication and Processing, ICCP 2012).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Scopus citations
  • Novel color Gabor-LBP-PHOG (GLP) descriptors for object and scene image classification

    Sinha, A., Banerji, S. & Liu, C., 2012, Proceedings - 8th Indian Conference on Computer Vision, Graphics and Image Processing, ICVGIP 2012. (ACM International Conference Proceeding Series).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Scopus citations
  • Novel color HWML descriptors for scene and object image classification

    Banerji, S., Sinha, A. & Liu, C., 2012, 2012 3rd International Conference on Image Processing Theory, Tools and Applications, IPTA 2012. p. 330-335 6 p. 6469564. (2012 3rd International Conference on Image Processing Theory, Tools and Applications, IPTA 2012).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Scopus citations
  • Novel color LBP descriptors for scene and image texture classification

    Banerji, S., Verma, A. & Liu, C., 2011, Proceedings of the 2011 International Conference on Image Processing, Computer Vision, and Pattern Recognition, IPCV 2011. p. 537-543 7 p. (Proceedings of the 2011 International Conference on Image Processing, Computer Vision, and Pattern Recognition, IPCV 2011; vol. 2).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    48 Scopus citations
  • Novel EFM-KNN classifier and a new color descriptor for image classification

    Verma, A. & Liu, C., 2011, WOCC 2011 - 20th Annual Wireless and Optical Communications Conference. 5872302. (WOCC 2011 - 20th Annual Wireless and Optical Communications Conference).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    6 Scopus citations
  • Novel gabor-PHOG features for object and scene image classification

    Sinha, A., Banerji, S. & Liu, C., 2012, Structural, Syntactic, and Statistical Pattern Recognition - Joint IAPR International Workshop, SSPR and SPR 2012, Proceedings. p. 584-592 9 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 7626 LNCS).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Open Access
    1 Scopus citations
  • Novel general KNN classifier and general nearest mean classifier for visual classification

    Liu, Q., Puthenputhussery, A. & Liu, C., Dec 9 2015, 2015 IEEE International Conference on Image Processing, ICIP 2015 - Proceedings. IEEE Computer Society, p. 1810-1814 5 p. 7351113. (Proceedings - International Conference on Image Processing, ICIP; vol. 2015-December).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3 Scopus citations
  • Object and scene image classification using unconventional color descriptors

    Banerji, S., Sinha, A. & Liu, C., 2012, Proceedings of the 2012 International Conference on Image Processing, Computer Vision, and Pattern Recognition, IPCV 2012. p. 695-701 7 p. (Proceedings of the 2012 International Conference on Image Processing, Computer Vision, and Pattern Recognition, IPCV 2012; vol. 2).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • On a clustering-based approach for traffic sub-area division

    Zhu, J., Niu, X. & Wu, C. Q., 2019, Advances and Trends in Artificial Intelligence. From Theory to Practice - 32nd International Conference on Industrial, Engineering and Other Applications of Applied Intelligent Systems, IEA/AIE 2019, Proceedings. Wotawa, F., Pill, I., Koitz-Hristov, R., Friedrich, G. & Ali, M. (eds.). Springer Verlag, p. 516-529 14 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 11606 LNAI).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    6 Scopus citations
  • On a Dynamic Data Placement Strategy for Heterogeneous Hadoop Clusters

    Liu, Y., Wu, C. Q., Wang, M., Hou, A. & Wang, Y., Nov 9 2018, 2018 International Symposium on Networks, Computers and Communications, ISNCC 2018. Institute of Electrical and Electronics Engineers Inc., 8530970. (2018 International Symposium on Networks, Computers and Communications, ISNCC 2018).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    7 Scopus citations
  • On a parallel spark workflow for frequent itemset mining based on array prefix-tree

    Niu, X., Qian, M., Wu, C. & Hou, A., Nov 2019, Proceedings of WORKS 2019: 14th Workshop on Workflows in Support of Large-Scale Science - Held in conjunction with SC 2019: The International Conference for High Performance Computing, Networking, Storage and Analysis. Institute of Electrical and Electronics Engineers Inc., p. 50-59 10 p. 8943526. (Proceedings of WORKS 2019: 14th Workshop on Workflows in Support of Large-Scale Science - Held in conjunction with SC 2019: The International Conference for High Performance Computing, Networking, Storage and Analysis).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    5 Scopus citations
  • On a Pipeline-Based Architecture for Parallel Visualization of Large-Scale Scientific Data

    Chu, D. & Wu, C. Q., Sep 23 2016, Proceedings - 45th International Conference on Parallel Processing Workshops, ICPPW 2016. Institute of Electrical and Electronics Engineers Inc., p. 88-97 10 p. 7576457. (Proceedings of the International Conference on Parallel Processing Workshops; vol. 2016-September).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Scopus citations
  • On a Small File Merger for Fast Access and Modifiability of Small Files in HDFS

    Chen, D., Wu, C. Q., Shen, W. & Zhang, Y., 2021, 2021 IEEE/ACS 18th International Conference on Computer Systems and Applications, AICCSA 2021 - Proceedings. IEEE Computer Society, (Proceedings of IEEE/ACS International Conference on Computer Systems and Applications, AICCSA; vol. 2021-December).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • On-demand node reclamation and replacement for guaranteed area coverage in long-lived sensor networks

    Tong, B., Li, Z., Wang, G. & Zhang, W., 2009, Quality of Service in Heterogeneous Networks - 6th Int. ICST Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness, QShine 2009 and AAA-IDEA 2009, Proceedings. p. 148-166 19 p. (Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering; vol. 22 LNICST).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    11 Scopus citations
  • On distributed information composition in big data systems

    Alquwaiee, H., He, S., Wu, C., Tang, Q. & Shen, X., Sep 2019, Proceedings - IEEE 15th International Conference on eScience, eScience 2019. Institute of Electrical and Electronics Engineers Inc., p. 168-177 10 p. 9041699. (Proceedings - IEEE 15th International Conference on eScience, eScience 2019).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • On efficiency of bicriteria optimization

    Calvin, J. M. & Žilinskas, A., Feb 12 2019, Proceedings LeGO 2018 � 14th International Global Optimization Workshop. Deutz, A. H., Hille, S. C., Sergeyev, Y. D. & Emmerich, M. T. M. (eds.). American Institute of Physics Inc., 20035. (AIP Conference Proceedings; vol. 2070).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • On enabling machine learning tasks atop public blockchains: A crowdsourcing approach

    Lu, Y., Tang, Q. & Wang, G., Feb 7 2019, Proceedings - 18th IEEE International Conference on Data Mining Workshops, ICDMW 2018. Zhu, F., Li, Z., Yu, J. & Tong, H. (eds.). IEEE Computer Society, p. 81-88 8 p. 8637413. (IEEE International Conference on Data Mining Workshops, ICDMW; vol. 2018-November).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    11 Scopus citations