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  • 1.
    Hammar, Kim
    et al.
    KTH.
    Jaradat, Shatha
    KTH, School of Electrical Engineering and Computer Science (EECS), Software and Computer systems, SCS.
    Dokoohaki, Nima
    KTH.
    Matskin, Mihhail
    KTH, School of Electrical Engineering and Computer Science (EECS), Software and Computer systems, SCS.
    Deep Text Mining of Instagram Data Without Strong Supervision2018In: Proceedings - 2018 IEEE/WIC/ACM International Conference on Web Intelligence, WI 2018, IEEE, 2018, p. 158-165Conference paper (Refereed)
    Abstract [en]

    With the advent of social media, our online feeds increasingly consist of short, informal, and unstructured text. This textual data can be analyzed for the purpose of improving user recommendations and detecting trends. Instagram is one of the largest social media platforms, containing both text and images. However, most of the prior research on text processing in social media is focused on analyzing Twitter data, and little attention has been paid to text mining of Instagram data. Moreover, many text mining methods rely on annotated training data, which in practice is both difficult and expensive to obtain. In this paper, we present methods for unsupervised mining of fashion attributes from Instagram text, which can enable a new kind of user recommendation in the fashion domain. In this context, we analyze a corpora of Instagram posts from the fashion domain, introduce a system for extracting fashion attributes from Instagram, and train a deep clothing classifier with weak supervision to classify Instagram posts based on the associated text. With our experiments, we confirm that word embeddings are a useful asset for information extraction. Experimental results show that information extraction using word embeddings outperforms a baseline that uses Levenshtein distance. The results also show the benefit of combining weak supervision signals using generative models instead of majority voting. Using weak supervision and generative modeling, an F1 score of 0.61 is achieved on the task of classifying the image contents of Instagram posts based solely on the associated text, which is on level with human performance. Finally, our empirical study provides one of the few available studies on Instagram text and shows that the text is noisy, that the text distribution exhibits the long-tail phenomenon, and that comment sections on Instagram are multi-lingual.

  • 2.
    Jaradat, Shatha
    KTH, School of Information and Communication Technology (ICT), Software and Computer systems, SCS.
    Deep cross-domain fashion recommendation2017In: RecSys 2017 - Proceedings of the 11th ACM Conference on Recommender Systems, Association for Computing Machinery (ACM), 2017, p. 407-410Conference paper (Refereed)
    Abstract [en]

    With the increasing number of online shopping services, the number of users and the quantity of visual and textual information on the Internet, there is a pressing need for intelligent recommendation systems that analyze the user's behavior amongst multiple domains and help them to find the desirable information without the burden of search. However, there is little research that has been done on complex recommendation scenarios that involve knowledge transfer across multiple domains. This problem is especially challenging when the involved data sources are complex in terms of the limitations on the quantity and quality of data that can be crawled. The goal of this paper is studying the connection between visual and textual inputs for better analysis of a certain domain, and to examine the possibility of knowledge transfer from complex domains for the purpose of efficient recommendations. The methods employed to achieve this study include both design of architecture and algorithms using deep learning technologies to analyze the effect of deep pixel-wise semantic segmentation and text integration on the quality of recommendations. We plan to develop a practical testing environment in a fashion domain.

  • 3.
    Jaradat, Shatha
    et al.
    KTH, School of Electrical Engineering and Computer Science (EECS), Software and Computer systems, SCS.
    Dokoohaki, Nima
    KTH, School of Electrical Engineering and Computer Science (EECS), Software and Computer systems, SCS.
    Hammar, Kim
    KTH, School of Electrical Engineering and Computer Science (EECS), Software and Computer systems, SCS.
    Wara, Ummal
    KTH, School of Electrical Engineering and Computer Science (EECS), Software and Computer systems, SCS.
    Matskin, Mihhail
    KTH, School of Electrical Engineering and Computer Science (EECS), Software and Computer systems, SCS.
    Dynamic CNN Models For Fashion Recommendation in Instagram2018In: 2018 IEEE INT CONF ON PARALLEL & DISTRIBUTED PROCESSING WITH APPLICATIONS, UBIQUITOUS COMPUTING & COMMUNICATIONS, BIG DATA & CLOUD COMPUTING, SOCIAL COMPUTING & NETWORKING, SUSTAINABLE COMPUTING & COMMUNICATIONS / [ed] Chen, JJ Yang, LT, IEEE COMPUTER SOC , 2018, p. 1144-1151Conference paper (Refereed)
    Abstract [en]

    Instagram as an online photo-sharing and social-networking service is becoming more powerful in enabling fashion brands to ramp up their business growth. Nowadays, a single post by a fashion influencer attracts a wealth of attention and a magnitude of followers who are curious to know more about the brands and style of each clothing item sitting inside the image. To this end, the development of efficient Deep CNN models that can accurately detect styles and brands have become a research challenge. In addition, current techniques need to cope with inherent fashion-related data issues. Namely, clothing details inside a single image only cover a small proportion of the large and hierarchical space of possible brands and clothing item attributes. In order to cope with these challenges, one can argue that neural classifiers should become adapted to large-scale and hierarchical fashion datasets. As a remedy, we propose two novel techniques to incorporate the valuable social media textual content to support the visual classification in a dynamic way. The first method is adaptive neural pruning (DynamicPruning) in which the clothing item category detected from posts' text analysis can be used to activate the possible range of connections of clothing attributes' classifier. The second method (DynamicLayers) is a dynamic framework in which multiple-attributes classification layers exist and a suitable attributes' classifier layer is activated dynamically based upon the mined text from the image. Extensive experiments on a dataset gathered from Instagram and a baseline fashion dataset (DeepFashion) have demonstrated that our approaches can improve the accuracy by about 20% when compared to base architectures. It is worth highlighting that with Dynamiclayers we have gained 35% accuracy for the task of multi-class multi-labeled classification compared to the other model.

  • 4.
    Jaradat, Shatha
    et al.
    KTH, School of Information and Communication Technology (ICT), Software and Computer systems, SCS.
    Dokoohaki, Nima
    Matskin, Mihhail
    KTH, School of Information and Communication Technology (ICT), Software and Computer systems, SCS.
    OLLDA: A Supervised and Dynamic Topic Mining Framework in Twitter2015In: 2015 IEEE International Conference on Data Mining Workshop (ICDMW), 2015, p. 1354-1359Conference paper (Refereed)
    Abstract [en]

    Analyzing media in real-time is of great importance with social media platforms at the epicenter of crunching, digesting and disseminating content to individuals connected to these platforms. Within this context, topic models, specially LDA, have gained strong momentum due to their scalability, inference power and their compact semantics. Although, state of the art topic models come short in handling streaming large chunks of data arriving dynamically onto the platform, thus hindering their quality of interpretation as well as their adaptability to information overload. As a result, in this manuscript we propose for a labelled and online extension to LDA (OLLDA), which incorporates supervision through external labeling and capability of quickly digesting real-time updates thus making it more adaptive to Twitter and platforms alike. Our proposed extension has capability of handling large quantities of newly arrived documents in a stream, and at the same time, is capable of achieving high topic inference quality given the short and often sloppy text of tweets. Our approach mainly uses an approximate inference technique based on variational inference coupled with a labeled LDA model. We conclude by presenting experiments using a one year crawl of Twitter data that shows significantly improved topical inference as well as temporal user profile classification when compared to state of the art baselines.

  • 5.
    Jaradat, Shatha
    et al.
    KTH, School of Information and Communication Technology (ICT), Software and Computer systems, SCS.
    Dokoohaki, Nima
    KTH, School of Information and Communication Technology (ICT), Software and Computer systems, SCS.
    Matskin, Mihhail
    KTH, School of Information and Communication Technology (ICT), Software and Computer systems, SCS.
    Ferrari, Elena
    Trust And Privacy Correlations in Social Networks: A Deep Learning Framework2016In: PROCEEDINGS OF THE 2016 IEEE/ACM INTERNATIONAL CONFERENCE ON ADVANCES IN SOCIAL NETWORKS ANALYSIS AND MINING ASONAM 2016, IEEE conference proceedings, 2016, p. 203-206Conference paper (Refereed)
    Abstract [en]

    Online Social Networks (OSNs) remain the focal point of Internet usage. Since the beginning, networking sites tried best to have right privacy mechanisms in place for users, enabling them to share the right content with the right audience. With all these efforts, privacy customizations remain hard for users across the sites. Existing research that address this problem mainly focus on semi-supervised strategies that introduce extra complexity by requiring the user to manually specify initial privacy preferences for their friends. In this work, we suggest an adaptive solution that can dynamically generate privacy labels for users in OSNs. To this end, we introduce a deep reinforcement learning framework that targets two key problems in OSNs like Facebook: the exposure of users' interactions through the network to less trusted direct friends, and the possibility of propagating user updates through direct friends' interactions to indirect friends. By implementing this framework, we aim at understanding how social trust and privacy could be correlated, specifically in a dynamic fashion. We report the ranked dependence between the generated privacy labels and the estimated user trust values, which indicate the ability of the framework to identify the highly trusted users and share with them higher percentages of data.

  • 6.
    Jaradat, Shatha
    et al.
    KTH, School of Electrical Engineering and Computer Science (EECS), Software and Computer systems, SCS.
    Dokoohaki, Nima
    KTH, School of Electrical Engineering and Computer Science (EECS), Software and Computer systems, SCS.
    Wara, Ummal
    KTH, School of Electrical Engineering and Computer Science (EECS), Software and Computer systems, SCS.
    Goswami, Mallu
    KTH, School of Electrical Engineering and Computer Science (EECS), Software and Computer systems, SCS.
    Hammar, Kim
    KTH, School of Electrical Engineering and Computer Science (EECS), Software and Computer systems, SCS.
    Matskin, Mihhail
    KTH, School of Electrical Engineering and Computer Science (EECS), Software and Computer systems, SCS.
    TALS: A framework for text analysis, fine-grained annotation, localisation and semantic segmentation2019In: Proceedings - International Computer Software and Applications Conference, IEEE Computer Society, 2019, Vol. 8754470, p. 201-206Conference paper (Refereed)
    Abstract [en]

    With around 2.77 billion users using online social media platforms nowadays, it is becoming more attractive for business retailers to reach and to connect to more potential clients through social media. However, providing more effective recommendations to grab clients’ attention requires a deep understanding of users’ interests. Given the enormous amounts of text and images that users share in social media, deep learning approaches play a major role in performing semantic analysis of text and images. Moreover, object localisation and pixel-by-pixel semantic segmentation image analysis neural architectures provide an enhanced level of information. However, to train such architectures in an end-to-end manner, detailed datasets with specific meta-data are required. In our paper, we present a complete framework that can be used to tag images in a hierarchical fashion, and to perform object localisation and semantic segmentation. In addition to this, we show the value of using neural word embeddings in providing additional semantic details to annotators to guide them in annotating images in the system. Our framework is designed to be a fully functional solution capable of providing fine-grained annotations, essential localisation and segmentation services while keeping the core architecture simple and extensible. We also provide a fine-grained labelled fashion dataset that can be a rich source for research purposes.

  • 7. Sandberg, Linn
    et al.
    Jaradat, Shatha
    KTH, School of Information and Communication Technology (ICT), Software and Computer systems, SCS.
    Dokoohaki, Nima
    KTH, School of Information and Communication Technology (ICT), Software and Computer systems, SCS.
    The social media election agenda Issue salience on Twitter during the European and Swedish 2014 elections2016In: PROCEEDINGS OF THE 2016 IEEE/ACM INTERNATIONAL CONFERENCE ON ADVANCES IN SOCIAL NETWORKS ANALYSIS AND MINING ASONAM 2016, IEEE conference proceedings, 2016, p. 793-794Conference paper (Refereed)
    Abstract [en]

    the role of issues in electoral preference formation has long been an established key factor and what voters consider the most important problem i.e. issue salience is essential for party choice. Political issues (and their salience to the electorate) also play an important role in parties' tactical campaign strategies. This study examines to what extent social media possibly can contribute in shaping the issue agenda regarding the political parties. The issue agenda on Twitter is likely to have its own characteristics and dynamics, shaped by the technical peculiarities, users and the new campaigning possibilities that social media offers. This study will identify what issues are salient in the online discussions in conjunction with the European election and Swedish national election 2014. The distribution of issue attention divided to the various parties on social media is analyzed in light of the issue agenda set forth by the voters for the different elections.

1 - 7 of 7
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  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
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  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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  • html
  • text
  • asciidoc
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