| 1. |
- Sweidan, Dirar, et al.
(författare)
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Predicting Customer Churn in Retailing
- 2022
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Ingår i: Proceedings 21st IEEE International Conference on Machine Learning and Applications ICMLA 2022. - : IEEE. - 9781665462839 - 9781665462846 ; , s. 635-640
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Konferensbidrag (refereegranskat)abstract
- Customer churn is one of the most challenging problems for digital retailers. With significantly higher costs for acquiring new customers than retaining existing ones, knowledge about which customers are likely to churn becomes essential. This paper reports a case study where a data-driven approach to churn prediction is used for predicting churners and gaining insights about the problem domain. The real-world data set used contains approximately 200 000 customers, describing each customer using more than 50 features. In the pre-processing, exploration, modeling and analysis, attributes related to recency, frequency, and monetary concepts are identified and utilized. In addition, correlations and feature importance are used to discover and understand churn indicators. One important finding is that the churn rate highly depends on the number of previous purchases. In the segment consisting of customers with only one previous purchase, more than 75% will churn, i.e., not make another purchase in the coming year. For customers with at least four previous purchases, the corresponding churn rate is around 25%. Further analysis shows that churning customers in general, and as expected, make smaller purchases and visit the online store less often. In the experimentation, three modeling techniques are evaluated, and the results show that, in particular, Gradient Boosting models can predict churners with relatively high accuracy while obtaining a good balance between precision and recall.
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| 2. |
- Wilhelmsson, Kenneth
(författare)
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Automatic Question Generation from Swedish Documents as a Tool for Information Extraction
- 2011
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Ingår i: Proceedings of the 18th Nordic Conference of Computational Linguistics NODALIDA 2011. ; , s. 323-326
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Konferensbidrag (refereegranskat)abstract
- An implementation of automatic question generation (QG) from raw Swedish text is presented. QG is here chosen as an alternative to natural query systems where any query can be posed and no indication is given of whether the current text database includes the information sought for. The program builds on parsing with grammatical functions from which corresponding questions are generated and it incorporates the article database of Swedish Wikipedia. The pilot system is meant to work with a text shown in the GUI and auto-completes user input to help find available questions. The act of question generation is here described together with early test results regarding the current produced questions.
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| 3. |
- Gulz, Agneta, et al.
(författare)
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Lärande och kognition
- 2012
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Ingår i: Kognitionsvetenskap. - Lund : Studentlitteratur. - 9789144051666
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 4. |
- Jensen, Mikael, 1969
(författare)
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Lekteorier
- 2013
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Bok (övrigt vetenskapligt/konstnärligt)
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| 5. |
- Jensen, Mikael, 1969-
(författare)
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Den fria tidens lärande
- 2011
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Bok (övrigt vetenskapligt/konstnärligt)abstract
- Lärande är centralt i det mesta vi gör. Kanske särskilt under vår fritid. Den här boken handlar huvudsakligen om hur vi människor lär oss och tar samtidigt med tiden som en väsentlig faktor för lärande. Vårt sätt att förhålla oss till tid påverkar hur vi lär. Det som kallas den fria tiden skapar förutsättningar för lärande som skiljer sig från lärande inom ramen för mer styrd tid. Relaterade begrepp som informellt och formellt lärande diskuteras. Flera teorier om lärande beskrivs. Författaren använder en mängd exempel för att illustrera olika sätt att se på tid och lärande. De mest centrala delarna berör barns lärande inom fritidshem, förskola och skola, men även lärande i hemmiljö och platser där barn befinner sig på sin fritid. Boken vänder sig i första hand till lärare och andra professionella som arbetar med barn under deras fritid. Fritidshemmet diskuteras i ett eget kapitel men alla delar av boken är relevanta för fritidshemsverksamhet.
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| 6. |
- Salomonson, Nicklas, et al.
(författare)
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Comparing Human-to-Human and Human-to-AEA Communication in Service Encounters
- 2013
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Ingår i: Journal of Business Communication. - : SAGE. - 0021-9436 .- 1552-4582. ; 50:1, s. 87-116
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Tidskriftsartikel (refereegranskat)abstract
- An increasing number of companies are introducing artificial agents as self-service tools on their websites, often motivated by the need to provide cost-efficient interaction solutions. These agents are designed to help customers and clients to conduct their business on the website. Their role on commercial websites is often to act as online sales/shopping assistants with the hope of replacing some of the interactions between customers and sales staff, thus supplementing or replacing human-to-human communication. However, research on artificial agents and comparisons with human-to-human communication, in particular, is still scarce. The purpose of this article is to explore the similarities and differences in communication between an artificial agent and customers compared with face-to-face communication between human service providers and customers. The method employed is a qualitative comparison of face-to-face human service provision in a travel agency setting and logs of interactions between customers and an artificial agent on an airline company website. The analysis is based on the theory of “activity-based communication analysis” and makes use of a framework of specific communication features provided by this theory. The article demonstrates a number of deficiencies in communication between artificial embodied agents and humans, suggesting that artificial embodied agents still lack many of the desirable communicative aspects of human-to-human service encounters.
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| 7. |
- Wittek, Peter, et al.
(författare)
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Matching Evolving Hilbert Spaces and Language for Semantic Access to Digital Libraries
- 2010
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Ingår i: The Role of Digital Libraries in a Time of Global Change. Proceedings of the 12th International Conference on Asia-Pacific Digital Libraries, ICADL 2010, Gold Coast, Australia, June 21-25, 2010.. - : Springer. - 9783642136535 ; , s. 262-263
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Extended by function (Hilbert) spaces, the 5S model of digital libraries (DL) [1] enables a physical interpretation of vectors and functions to keep track of the evolving semantics and usage context of the digital objects by support vector machines (SVM) for text categorization (TC). For this conceptual transition, three steps are necessary: (1) the application of the formal theory of DL to Lebesgue (function, L2) spaces; (2) considering semantic content as vectors in the physical sense (i.e. position and direction vectors) rather than as in linear algebra, thereby modelling word semantics as an evolving field underlying classifications of digital objects; (3) the replacement of vectors by functions in a new compact support basis function (CSBF) semantic kernel utilizing wavelets for TC by SVMs.
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| 8. |
- Darányi, Sándor, et al.
(författare)
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Detecting Multiple Motif Co-occurrences in the Aarne-Thompson- Uther Tale Type Catalog : A Preliminary Survey
- 2012
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Ingår i: Anales de Documentación. - : University of Murcia. - 1575-2437 .- 1697-7904. ; 15:1
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Tidskriftsartikel (refereegranskat)abstract
- : Catalogs project subject field experience onto a multidimensional map which is then converted to a hierarchical list. In the case of the Aarne-Thompson-Uther Tale Type Catalog (ATU), this subject field is the global pattern of tale content defining tale types as canonical motif sequences. To extract and visualize such a map, we considered ATU as a corpus and analysed two segments of it, “Supernatural adversaries” (types 300-399) in particular and “Tales of magic” (types 300-749) in general. The two corpora were scrutinized for multiple motif cooccurrences and visualized by two-mode clustering of a bag-of-motif co-occurrences matrix. Findings indicate the presence of canonical content units above motif level as well. The organization scheme of folk narratives utilizing motif sequences is reminiscent of nucleotid sequences in the genetic code.
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