Neural Attentive Session-based Recommendation

Given e-commerce scenarios that user profiles are invisible, session-based recommendation is proposed to generate recommendation results from short sessions. Previous work only considers the user's sequential behavior in the current session, whereas the user's main purpose in the current session is not emphasized. In this paper, we propose a novel neural networks framework, i.e., Neural Attentive Recommendation Machine (NARM), to tackle this problem. Specifically, we explore a hybrid encoder with an attention mechanism to model the user's sequential behavior and capture the user's main purpose in the current session, which are combined as a unified session representation later. We then compute the recommendation scores for each candidate item with a bi-linear matching scheme based on this unified session representation. We train NARM by jointly learning the item and session representations as well as their matchings. We carried out extensive experiments on two benchmark datasets. Our experimental results show that NARM outperforms state-of-the-art baselines on both datasets. Furthermore, we also find that NARM achieves a significant improvement on long sessions, which demonstrates its advantages in modeling the user's sequential behavior and main purpose simultaneously.Comment: Proceedings of the 2017 ACM on Conference on Information and Knowledge Management. arXiv admin note: text overlap with arXiv:1511.06939, arXiv:1606.08117 by other author

Increased single-balloon Foley catheter volume for induction of labor and time to delivery: A systematic review and meta-analysis

INTRODUCTION: Induction of labor is a common intervention. The objective was to investigate whether larger Foley catheter volumes for labor induction decrease the total time from induction to delivery. MATERIAL AND METHODS: Randomized controlled trials comparing larger single-balloon volumes (60-80 mL) during Foley catheter cervical ripening with usual volume (30 mL) in women undergoing labor induction were identified by searching electronic databases (MEDLINE, Scopus, ClinicalTrials.gov, PROSPERO, EMBASE, Scielo and the Cochrane Central Register of Controlled Trials) from inception through 2017. The primary outcome was mean time from induction to delivery in hours. Secondary outcomes included time from induction to vaginal delivery, delivery within 24 h, time to Foley expulsion, cesarean section, chorioamnionitis, epidural use, hemorrhage, meconium staining, and neonatal intensive care unit admission. Meta-analysis was performed using the random effects model of DerSimonian and Laird (PROSPERO CRD42017058885). RESULTS: Seven randomized controlled trials including 1432 singleton gestations were included in the systematic review. Women randomized to larger volumes of balloon had a significantly shorter time from induction to delivery (mean difference 1.97 h, 95% CI -3.88 to -0.06). There was no difference in cesarean section between groups (16 vs. 18%, relative risk 0.84, 95% CI 0.6-1.17). A larger balloon volume was associated with a nonsignificant decrease in time from induction to delivery in multiparous (mean difference 2.67 h, 95% CI -6.1 to 0.76) and nulliparous women (mean difference 1.82 h, 95% CI -4.16 to 0.53). CONCLUSION: Balloon volumes larger than 30 mL during Foley catheter induction reduce total time to delivery by approximately 2 h

Verification and Control of Partially Observable Probabilistic Real-Time Systems

We propose automated techniques for the verification and control of probabilistic real-time systems that are only partially observable. To formally model such systems, we define an extension of probabilistic timed automata in which local states are partially visible to an observer or controller. We give a probabilistic temporal logic that can express a range of quantitative properties of these models, relating to the probability of an event's occurrence or the expected value of a reward measure. We then propose techniques to either verify that such a property holds or to synthesise a controller for the model which makes it true. Our approach is based on an integer discretisation of the model's dense-time behaviour and a grid-based abstraction of the uncountable belief space induced by partial observability. The latter is necessarily approximate since the underlying problem is undecidable, however we show how both lower and upper bounds on numerical results can be generated. We illustrate the effectiveness of the approach by implementing it in the PRISM model checker and applying it to several case studies, from the domains of computer security and task scheduling

Dark energy from conformal symmetry breaking

The breakdown of conformal symmetry in a conformally invariant scalar-tensor gravitational model is revisited in the cosmological context. Although the old scenario of conformal symmetry breaking in cosmology containing scalar field has already been used in many earlier works, it seems that no special attention has been paid for the investigation on the possible connection between the breakdown of conformal symmetry and the existence of dark energy. In this paper, it is shown that the old scenario of conformal symmetry breaking in cosmology, if properly interpreted, not only has a potential ability to describe the origin of dark energy as a symmetry breaking effect, but also may resolve the coincidence problem.Comment: 11 pages, minor revision, published online in EPJ

‘Oh you don’t want asylum seekers, oh you’re just racist’: A discursive analysis of discussions about whether it’s racist to oppose asylum seeking

ABSTRACT In this article, we explore how speakers discuss whether or not it is racist to oppose asylum seekers. A discourse analysis is conducted on the parts of a corpus of data collected from focus groups with undergraduate students talking about asylum seeking in which they were asked if it is racist to oppose asylum. It is shown that speakers use the word ‘just’ as part of a contrast structure which is used to present a topic as self-evidently unreasonable. While some participants orient to the taboo against prejudice, it is shown that there is also an orientation to the idea that accusations of racism are unreasonable and that opposition to asylum is usually based on practical and economic reasons rather than racism. These findings are discussed in light of the growing literature surrounding the changing nature of race talk and new taboos on accusations of racism

A personalized and context-aware news offer for mobile devices

For classical domains, such as movies, recommender systems have proven their usefulness. But recommending news is more challenging due to the short life span of news content and the demand for up-to-date recommendations. This paper presents a news recommendation service with a content-based algorithm that uses features of a search engine for content processing and indexing, and a collaborative filtering algorithm for serendipity. The extension towards a context-aware algorithm is made to assess the information value of context in a mobile environment through a user study. Analyzing interaction behavior and feedback of users on three recommendation approaches shows that interaction with the content is crucial input for user modeling. Context-aware recommendations using time and device type as context data outperform traditional recommendations with an accuracy gain dependent on the contextual situation. These findings demonstrate that the user experience of news services can be improved by a personalized context-aware news offer

Race, Identity, and Professional Responsibility: Why Legal Services Organizations Need African American Staff Attorneys

Given the fundamental importance of the attorney-client relationship in securing favorable outcomes for clients, legal services organizations that serve large populations of African Americans should employ African American staff attorneys because: (1) African American lawyers and clients share a group identity that makes it more likely that a black attorney will be able to gain a black client\u27s trust; (2) black attorneys communicate more effectively with black clients; and (3) the perception of a judicial system that is unfair and racist is likely to encourage black clients to trust black lawyers more than white lawyers, who are more likely to be perceived as part of the system. Empirical evidence from the legal and medical fields show that African American clients are more likely to trust and communicate effectively with African American service providers. This Article also explores, however, the reasons why some African Americans may not want a black attorney. One reason is that black clients may feel better off with a white lawyer precisely because racism infects the American judicial system. Another reason may be that some African Americans may believe that white lawyers are better lawyers. Finally, in some circumstances, a black client may not want a black lawyer if he perceives the lawyer as not black enough. Notwithstanding some of these preferences, however, the empirical evidence strongly suggests that more often than not, black clients prefer black lawyers. Because race consideration in staffing implicates discrimination law, this Article also considers recent Supreme Court precedent that affects the ability of certain organizations to engage in color-conscious actions. According to a plurality of the Court in Parents Involved in Community Schools v. Seattle School District No. 1, the school assignment programs at issue conflicted with the premise of Brown, which requires strict adherence to colorblindness. Unfortunately, this approach ignores the continuing power of race and is a stark departure from Justice Blackmun\u27s defense of affirmative action in Bakke. While a definitive conclusion as to when the law allows color-consciousness is difficult in light of the Court\u27s recent decisions, the theme of this Article echoes Justice Blackmun. In essence, this Article argues that we cannot solve the problems that face African Americans by removing race-consciousness from the dialogue about diversity in the legal profession

Challenging \u3ci\u3eMonoHumanism\u3c/i\u3e: An Argument for Changing the Way We Think About Intercountry Adoption

The Convention on the Rights of the Child\u27 (CRC) provides a legal framework that establishes a child\u27s right to be raised in the context of her family and her culture. We regularly violate this most fundamental right of children because we fail to come to terms with our imperialist orientation toward the world. This failure has been caused, in part, by how we have constructed our way of thinking about intercountry adoption. We now have a conception of intercountry adoption that I refer to in this Article as MonoHumanism. In the context of intercountry adoption, MonoHumanism means that children are not seen in the context of their family, community, and culture, but instead, narrowly as the potential children of Western adults. In other words, children are seen through a narrative of identity in the United States, which I am calling MonoHumanism, to the exclusion of knowledge and discourse with its origins in the lives, cultures, and vocabulary of the children themselves