Interaction in creative tasks: ideation, representation and evaluation in composition

The design of tools for creative activities affects the creative processes and output of users. In this paper we consider how an understanding of creative interaction can inform the design of support tools in a creative domain, and where creative needs cross domain boundaries. Using observations of musical composers we analyse the theoretical approaches to understanding creativity and their use to HCI. Cycles of ideation and evaluation are suggested as atomic elements of creative interactions, with the representation of ideas a central activity for individual and collaborating composers. A model of collaborative composition was developed, along with an analysis of the representational types used in the domain. This led to the design and evaluation of a prototype Sonic Sketchpad for musical idea representation

Crossing the technology adoption chasm: implications for DoD

Acquisition research (Graduate School of Business & Public Policy)DoD faces significant challenges in delivering promising new technologies to service members quickly and cost-effectively. To better understand DOD's technology adoption challenges, we review the technology diffusion literature to identify factors associated with successful and unsuccessful technology adoption processes, conduct case studies of DoD's advanced technology programs and propose a conceptual technology adoption model. The literature review identifies three overarching factors reflecting the complexities of defense technology adoption: benefit-cost uncertainty, organizational externalities, and direct and indirect network externalities. Technology adoption clearly involves benefit and cost uncertainties. Organizational externalities arise because there are typically multiple stakeholders from different DoD constituencies. Direct and indirect network externalities reflect the joint and interrelated nature of defense technologies on the battlefield. A closer look at one of DoD's advanced technology development programs indicates that success factors in this program generally parallel the results of the literature survey: the importance of benefit-cost uncertainty, management commitment (organizational externalities), technology champion (network externalities) and the prospects for future technology transfer (network externalities). Finally, we present conceptual technology adoption models incorporating benefit-cost uncertainty, organizational externalities and network externalities. These models can explain the diffusion patterns observed in the defense department: no adoption, full adoption, and partial adoption/de-adoption.Approved for public release; distribution is unlimited

Mechano-Biological Interactions of Endothelial Cells

Atherosclerosis is an ever-increasing cause of morbidity in the western world. Current surgical treatments include bypass grafts and coronary artery stents. However, there is still a need for alternative approaches especially for those who cannot receive conventional therapy. Tissue engineering is one such approach that may hold the key to the repair and regeneration. Tissue engineering is one such approach that may hold the key to the repair and regeneration of coronary arteries. Nevertheless, many questions need to be answered before a vialbe vascular tissie with the inherent properties of native tissue becomes a real contender with the surgical therapies in use today

Public Institutions and Private Incentives: Three Essays

No abstract available

In Defense of Unanimous Jury Verdicts: Communication, Mistrials, and Sincerity

It is a widely held belief among legal theorists that the requirement of unanimous jury verdicts in criminal trials reduces the likelihood of convicting an innocent defendant. This belief is, to a large extent, dependent upon the assumption that all jurors will vote sincerely based on their own impression of the trial evidence. Recent literature, however, has drawn this assumption into question, and simple models of jury procedure have been constructed in which, except under very strict conditions, it is never a Nash equilibrium for all jurors to vote sincerely. Moreover, Nash equilibrium behavior in these models leads to higher probabilities of both convicting an innocent defendant and acquitting a guilty defendant under unanimity rule than under a wide variety of alternative voting rules, including simple majority rule. The present paper extends these models by adding minimal enhancements that we argue bring the existing models closer to actual jury procedures. In particular, we separately analyze the implications of (1) incorporating the possibility of mistrial and (2) allowing limited communication among jurors. Under each of these enhancements, we identify general conditions under which sincere voting is, in fact, a Nash equilibrium. We further demonstrate that under such sincere voting equilibria, unanimous jury verdicts perform better than any alternative voting rule in terms of minimizing probability of trial error and maximizing expected utility

Accessible Conversational User Interfaces: Considerations for design

Conversational user interfaces (CUIs), such as chatbots and voice assistants, are increasingly common in areas of day-to-day life, and can be expected to become ever more pervasive in the future. These interfaces are being designed for ever more complex interactions, and they appear to have potential to be beneficial to people with disabilities to interact through the web and with technologies embedded in the environment. However, to fulfil this promise they need to be designed to be accessible. This paper reviews a range of current guidance, reports, research and literature on accessible design for different disability groups, including users with mental health issues, autism, health conditions, cognitive disabilities, dyslexia or learning difficulties, and sensory, mobility or dexterity impairments. We collate the elements from this body of guidance that appear relevant to the design of accessible CUIs, and instances where guidance presents issues which are less conclusive, and require further exploration. Using this, we develop a set of questions which could be useful in the further research and development of accessible CUIs. We conclude by considering why CUIs could present opportunities for furthering accessibility, by introducing an example of this potential – a project to design an assistant to support students to disclose their disabilities and organise support, without the need to fill in forms

A New Paradigm to Address Bid Protests

Sponsored Report (for Acquisition Research Program)distribution unlimited.The goal of this study is to offer senior decision-makers a useful framework to evaluate, articulate, and recommend modifications of the government''s bid protest policy to improve procurement outcomes. Most countries allow disappointed bidders to protest public procurement decisions as an oversight mechanism to minimize fraud and errors by procurement officials. The expectation is that allowing bid protests increases transparency and accountability and encourages competition, reducing the cost of public purchases. A key contribution of this study is to add an economics dimension to a bid protest process that is mostly thought of in legal terms. The economics approach suggests firms are likely to use the protest process strategically to improve their competitive bargaining position and will be equally strategic in their decision to protest an award. The conclusion is that a firm''s responsibility to its shareholders can lead it to undertake protests for reasons substantially different from, and fundamentally opposed to, the government''s objectives. The economics approach suggests minimizing the risk of protests that result in cost overruns, schedule delays, and performance gaps, while preserving the benefits offered by protests to promote competition and ensure the integrity, transparency, and accountability of the procurement process. Adopting an economics perspective reveals two other crucial insights: firms can exploit protests to extract concessions (Fed Mail), and risk-averse officials can overreact in attempts to achieve protest-proof procurements (Buy-offs). In recognizing costs as well as benefits of a protest system, the economics approach invites a review of alternative portfolios of governance mechanisms that complement bid protests (internal audits, external audits, independent investigations, alternative dispute resolution, increased training and incentives, etc.), to improve procurement outcomes.Naval Postgraduate School Acquisition Research ProgramApproved for public release; distribution is unlimited

From early intervention in psychosis to youth mental health reform: a review of the evolution and transformation of mental health services for young people.

PURPOSE: The objective of this review is to report on recent developments in youth mental health incorporating all levels of severity of mental disorders encouraged by progress in the field of early intervention in psychotic disorders, research in deficiencies in the current system and social advocacy. METHODS: The authors have briefly reviewed the relevant current state of knowledge, challenges and the service and research response across four countries (Australia, Ireland, the UK and Canada) currently active in the youth mental health field. RESULTS: Here we present information on response to principal challenges associated with improving youth mental services in each country. Australia has developed a model comprised of a distinct front-line youth mental health service (Headspace) to be implemented across the country and initially stimulated by success in early intervention in psychosis; in Ireland, Headstrong has been driven primarily through advocacy and philanthropy resulting in front-line services (Jigsaw) which are being implemented across different jurisdictions; in the UK, a limited regional response has addressed mostly problems with transition from child-adolescent to adult mental health services; and in Canada, a national multi-site research initiative involving transformation of youth mental health services has been launched with public and philanthropic funding, with the expectation that results of this study will inform implementation of a transformed model of service across the country including indigenous peoples. CONCLUSIONS: There is evidence that several countries are now engaged in transformation of youth mental health services and in evaluation of these initiatives.This is the author accepted manuscript. The final version is available from Springer via http://dx.doi.org/10.1007/s00127-015-1165-

Design and evaluation of an audio game-inspired auditory map interface

This study evaluated a web-based auditory map prototype built utilizing conventions found in audio games and presents findings from a set of tasks participants performed with the prototype. The prototype allowed participants to use their own computer and screen reader, contrary to most studies, which restrict use to a single platform and a self-voicing feature (providing a voice that talks by default). There were three major findings from the tasks: the interface was extremely easy to learn and navigate, participants all had unique navigational styles and preferred using their own screen reader, and participants needed user interface features that made it easier to understand and answer questions about spatial properties and relationships. Participants gave an average task load score of 39 from the NASA Task Load Index and gave a confidence level of 46/100 for actually using the prototype to physically navigate

A Framework to Manage the Complex Organisation of Collaborating: Its Application to Autonomous Systems

In this paper we present an analysis of the complexities of large group collaboration and its application to develop detailed requirements for collaboration schema for Autonomous Systems (AS). These requirements flow from our development of a framework for collaboration that provides a basis for designing, supporting and managing complex collaborative systems that can be applied and tested in various real world settings. We present the concepts of "collaborative flow" and "working as one" as descriptive expressions of what good collaborative teamwork can be in such scenarios. The paper considers the application of the framework within different scenarios and discuses the utility of the framework in modelling and supporting collaboration in complex organisational structures