113 research outputs found
Analyzing and Predicting Purchase Intent in E-commerce: Anonymous vs. Identified Customers
The popularity of e-commerce platforms continues to grow. Being able to
understand, and predict customer behavior is essential for customizing the user
experience through personalized result presentations, recommendations, and
special offers. Previous work has considered a broad range of prediction models
as well as features inferred from clickstream data to record session
characteristics, and features inferred from user data to record customer
characteristics. So far, most previous work in the area of purchase prediction
has focused on known customers, largely ignoring anonymous sessions, i.e.,
sessions initiated by a non-logged-in or unrecognized customer. However, in the
de-identified data from a large European e-commerce platform available to us,
more than 50% of the sessions start as anonymous sessions. In this paper, we
focus on purchase prediction for both anonymous and identified sessions on an
e-commerce platform. We start with a descriptive analysis of purchase vs.
non-purchase sessions. This analysis informs the definition of a feature-based
model for purchase prediction for anonymous sessions and identified sessions;
our models consider a range of session-based features for anonymous sessions,
such as the channel type, the number of visited pages, and the device type. For
identified user sessions, our analysis points to customer history data as a
valuable discriminator between purchase and non-purchase sessions. Based on our
analysis, we build two types of predictors: (1) a predictor for anonymous that
beats a production-ready predictor by over 17.54% F1; and (2) a predictor for
identified customers that uses session data as well as customer history and
achieves an F1 of 96.20%. Finally, we discuss the broader practical
implications of our findings.Comment: 10 pages, accepted at SIGIR eCommerce 202
Geometric Phase, Curvature, and Extrapotentials in Constrained Quantum Systems
We derive an effective Hamiltonian for a quantum system constrained to a
submanifold (the constraint manifold) of configuration space (the ambient
space) by an infinite restoring force. We pay special attention to how this
Hamiltonian depends on quantities which are external to the constraint
manifold, such as the external curvature of the constraint manifold, the
(Riemannian) curvature of the ambient space, and the constraining potential. In
particular, we find the remarkable fact that the twisting of the constraining
potential appears as a gauge potential in the constrained Hamiltonian. This
gauge potential is an example of geometric phase, closely related to that
originally discussed by Berry. The constrained Hamiltonian also contains an
effective potential depending on the external curvature of the constraint
manifold, the curvature of the ambient space, and the twisting of the
constraining potential. The general nature of our analysis allows applications
to a wide variety of problems, such as rigid molecules, the evolution of
molecular systems along reaction paths, and quantum strip waveguides.Comment: 27 pages with 1 figure, submitted to Phys. Rev.
Inflammation and breast cancer. Inflammatory component of mammary carcinogenesis in ErbB2 transgenic mice
This review addresses genes differentially expressed in the mammary gland transcriptome during the progression of mammary carcinogenesis in BALB/c mice that are transgenic for the rat neu (ERBB2, or HER-2/neu) oncogene (BALB-neuT664V-E mice). The Ingenuity knowledge database was used to characterize four functional association networks whose hub genes are directly linked to inflammation (specifically, the genes encoding IL-1ÎČ, tumour necrosis factor, interferon-Îł, and monocyte chemoattractant protein-1/CC chemokine ligand-2) and are increasingly expressed during such progression. In silico meta-analysis in a human breast cancer dataset suggests that proinflammatory activation in the mammary glands of these mice reflects a general pattern of human breast cancer
Backlash en het glazen plafond
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143201.pdf (publisher's version ) (Open Access)Waarom zijn er zo weinig vrouwen in topposities? En waarom vinden mensen vrouwelijke leiders vaak onaardig? In dit artikel wordt onderzoek besproken dat een antwoord probeert te geven op deze vragen. Voor vrouwelijke leidinggevenden kan het lastig zijn om zowel aardig als competent gevonden te worden, maar ook bescheiden mannen hebben het niet altijd even gemakkelijk
Het backlash effect in Nederland: Waarom pittige vrouwen in Nederland niet aan de top komen
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77079.pdf (author's version ) (Open Access
Backlash en het glazen plafond
Waarom zijn er zo weinig vrouwen in topposities? En waarom vinden mensen vrouwelijke leiders vaak onaardig? In dit artikel wordt onderzoek besproken dat een antwoord probeert te geven op deze vragen. Voor vrouwelijke leidinggevenden kan het lastig zijn om zowel aardig als competent gevonden te worden, maar ook bescheiden mannen hebben het niet altijd even gemakkelijk
De Draw-a-face taak: een nieuw paradigma om spontane dispositionele inferenties te meten
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Gillende mannen, boze vrouwen: Backlash en het selectief onthouden
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Too exhausted to go to bed: Implicit theories about willpower and stress predict bedtime procrastination
While most people are aware of the importance of sleep for their health, wellâbeing, and performance, bedtime procrastination is a pervasive phenomenon that can be conceptualized as a case of selfâcontrol failure (Kroese et al., Frontiers in Psychology, 5, 2014, 1). Two daily diary studies (N1 = 185, N2 = 137) investigated beliefs about willpower and stress as interactive predictors of bedtime procrastination. Beliefs about willpower capture whether people think of their willpower as limited resource that gets easily depleted (limited theory) or as something that remains regardless of previous acts of selfâcontrol (nonâlimited theory). Results show that after a stressful day, people with a limited versus nonâlimited theory procrastinate more on going to bed, while there is no difference in bedtime procrastination on less stressful days. Thus, ironically, limited theorists who should be more concerned with recovering their resources after a stressful day sleep less the following night
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