Towards Causal Analysis of Empirical Software Engineering Data: The Impact of Programming Languages on Coding Competitions

There is abundant observational data in the software engineering domain, whereas running large-scale controlled experiments is often practically impossible. Thus, most empirical studies can only report statistical correlations -- instead of potentially more insightful and robust causal relations. To support analyzing purely observational data for causal relations, and to assess any differences between purely predictive and causal models of the same data, this paper discusses some novel techniques based on structural causal models (such as directed acyclic graphs of causal Bayesian networks). Using these techniques, one can rigorously express, and partially validate, causal hypotheses; and then use the causal information to guide the construction of a statistical model that captures genuine causal relations -- such that correlation does imply causation. We apply these ideas to analyzing public data about programmer performance in Code Jam, a large world-wide coding contest organized by Google every year. Specifically, we look at the impact of different programming languages on a participant's performance in the contest. While the overall effect associated with programming languages is weak compared to other variables -- regardless of whether we consider correlational or causal links -- we found considerable differences between a purely associational and a causal analysis of the very same data. The takeaway message is that even an imperfect causal analysis of observational data can help answer the salient research questions more precisely and more robustly than with just purely predictive techniques -- where genuine causal effects may be confounded

FinBook: literary content as digital commodity

This short essay explains the significance of the FinBook intervention, and invites the reader to participate. We have associated each chapter within this book with a financial robot (FinBot), and created a market whereby book content will be traded with financial securities. As human labour increasingly consists of unstable and uncertain work practices and as algorithms replace people on the virtual trading floors of the worlds markets, we see members of society taking advantage of FinBots to invest and make extra funds. Bots of all kinds are making financial decisions for us, searching online on our behalf to help us invest, to consume products and services. Our contribution to this compilation is to turn the collection of chapters in this book into a dynamic investment portfolio, and thereby play out what might happen to the process of buying and consuming literature in the not-so-distant future. By attaching identities (through QR codes) to each chapter, we create a market in which the chapter can ‘perform’. Our FinBots will trade based on features extracted from the authors’ words in this book: the political, ethical and cultural values embedded in the work, and the extent to which the FinBots share authors’ concerns; and the performance of chapters amongst those human and non-human actors that make up the market, and readership. In short, the FinBook model turns our work and the work of our co-authors into an investment portfolio, mediated by the market and the attention of readers. By creating a digital economy specifically around the content of online texts, our chapter and the FinBook platform aims to challenge the reader to consider how their personal values align them with individual articles, and how these become contested as they perform different value judgements about the financial performance of each chapter and the book as a whole. At the same time, by introducing ‘autonomous’ trading bots, we also explore the different ‘network’ affordances that differ between paper based books that’s scarcity is developed through analogue form, and digital forms of books whose uniqueness is reached through encryption. We thereby speak to wider questions about the conditions of an aggressive market in which algorithms subject cultural and intellectual items – books – to economic parameters, and the increasing ubiquity of data bots as actors in our social, political, economic and cultural lives. We understand that our marketization of literature may be an uncomfortable juxtaposition against the conventionally-imagined way a book is created, enjoyed and shared: it is intended to be

Foreign language learning in Second Life and the implications for resource provision in academic libraries

This project focuses on foreign language learning in Second Life and the implications for resource provision in academic libraries. In this context Second Life does not refer to the later years in life but to an online virtual world frequented by thousands of people simultaneously. Hislope sees it as “an excellent potential resource for supplementing foreign language classes” and this project aims to establish whether academic libraries have a role to play in this.The Arcadia Programme has been funded by a generous grant from the Arcadia Fund. http://www.arcadiafund.org.u

The imperfect observer: Mind, machines, and materialism in the 21st century

The dualist / materialist debates about the nature of consciousness are based on the assumption that an entirely physical universe must ultimately be observable by humans (with infinitely advanced tools). Thus the dualists claim that anything unobservable must be non-physical, while the materialists argue that in theory nothing is unobservable. However, there may be fundamental limitations in the power of human observation, no matter how well aided, that greatly curtail our ability to know and observe even a fully physical universe. This paper presents arguments to support the model of an inherently limited observer and explores the consequences of this view

OER Hub Researcher Pack

The OER Hub researcher pack will be of interest to anyone conducting research into the impact of open educational resources (OER) or open education. Building on the earlier release of tools developed, used and released by the OER Hub, the researcher pack provides explanation and guidance on how to use these tools. All material and tools are CC BY licensed and are available for reuse

The Official Student Newspaper of UAS

Health Corner / Study Abroad -- Student Gov. Update / The Game is On -- Don't be S.A.D. / Love your Lungs -- Pack it Up / Spirit of Collaboration -- Calendar and Comics

Towards a theory of software engineering

A theory of software engineering (SE) is presented and its application to explaining and analysing SE situations is illustrated. The theory is based on a characterization of SE representations and the fundamental activities that are applied to them. Motivations for developing a theory and means of establishing its validity are also discussed

Possessive indexes in Assamese

This paper deals with a comprehensive description of a set of possessive indexes found in Assamese, a language spoken in the eastern part of India, by a majority of people living in the state of Assam. Genetically, this language belongs to the group of Indo-Aryan language family and shares a close affinity with Bengali and Oriya languages due to their common source of origin. The possessive indexes of the language are found to be suffixed to the possessed noun in possessive constructions (Possessive NPs)) in terms of the category of person. Cross-linguistically, it is not very uncommon to find this kind of markers in possessive NPs (Siewierska 2004). But what makes Assamese interesting in this respect is that the set of markers found in Assamese is not derived from pronominal forms as attested in many languages of the world. Furthermore, the existence of possessive markers is an unusual phenomenon in Assamese in that it is neither common in NIA languages nor in South Asian languages (Paudyal 2008). Apart from a few geographically distant languages of Indo-Aryan origin, these markers are not available in any other Indo-Aryan languages which are close to Assamese, either geographically or genetically. Thus, this paper focuses on four aspects:  a comprehensive description of the markers as stated above, a survey of the markers in other Indo-Aryan languages, the historical origin of the markers, and the origin of the system of marking