Probabilistic Logic Programming with Beta-Distributed Random Variables

We enable aProbLog---a probabilistic logical programming approach---to reason in presence of uncertain probabilities represented as Beta-distributed random variables. We achieve the same performance of state-of-the-art algorithms for highly specified and engineered domains, while simultaneously we maintain the flexibility offered by aProbLog in handling complex relational domains. Our motivation is that faithfully capturing the distribution of probabilities is necessary to compute an expected utility for effective decision making under uncertainty: unfortunately, these probability distributions can be highly uncertain due to sparse data. To understand and accurately manipulate such probability distributions we need a well-defined theoretical framework that is provided by the Beta distribution, which specifies a distribution of probabilities representing all the possible values of a probability when the exact value is unknown.Comment: Accepted for presentation at AAAI 201

Trust and obfuscation principles for quality of information in emerging pervasive environments

Non peer reviewedPostprin

Accurate formation energies of charged defects in solids: a systematic approach

Defects on surfaces of semiconductors have a strong effect on their reactivity and catalytic properties. The concentration of different charge states of defects is determined by their formation energies. First-principles calculations are an important tool for computing defect formation energies and for studying the microscopic environment of the defect. The main problem associated with the widely used supercell method in these calculations is the error in the electrostatic energy, which is especially pronounced in calculations that involve surface slabs and 2D materials. We present an internally consistent approach for calculating defect formation energies in inhomogeneous and anisotropic dielectric environments, and demonstrate its applicability to the cases of the positively charged Cl vacancy on the NaCl (100) surface and the negatively charged S vacancy in monolayer MoS2

What are Firms? Evolution from Birth to Public Companies

We study how firm characteristics evolve from early business plan to initial public offering to public company for 49 venture capital financed companies. The average time elapsed is almost 6 years. We describe the financial performance, business idea, point(s) of differentiation, non-human capital assets, growth strategy, customers, competitors, alliances, top management, ownership structure, and the board of directors. Our analysis focuses on the nature and stability of those flrIn attributes. Firm business lines remain remarkably stable from business plan through public company. Within those business lines, non-human capital aspects of the businesses appear more stable than human capital aspects. In the cross-section, firms with more alienable assets have substantially more human capital turnover.Theory of the firm; Entrepreneurship; Venture capital; Firm life cycle

Goal Directed Conflict Resolution and Policy Refinement

Peer reviewedPostprin

Cunningham Children's Home Supported Education and Employment for Older Youth in Care

A collaboration of the University of Illinois School of Social Work/Children and Family Research Center and Cunningham Children's Home, the research described in this report analyzes empirically the status of Cunningham's existing vocational programming for foster children and youth. Data reported here primarily come from a survey of 58 Cunningham clients, supplemented by focus group data from a smaller group of Cunningham clients and information on occupational interest from a commercial computer-based career planning program (Career Cruising) used by Cunningham youth. Initially, researchers also planned to develop a supported education/employment pilot model designed to serve the specific population of foster children and youth. However, findings from the research suggest the need for a structure and curriculum more compatible with currently accepted models in community mental health and adult education than with the resources and supports available in a largely residential program like Cunningham. This represents a significant barrier to quick implementation of supported education/employment for the foster population, and so development of the pilot model has been deferred. Meanwhile, the authors have incorporated findings from this study into the Children and Family Research Center's ongoing research agenda on transitioning foster youth, expecting these results will continue to inform both research and practice supporting the progress of these young people toward successful adulthood

COIN@AAMAS2015

COIN@AAMAS2015 is the nineteenth edition of the series and the fourteen papers included in these proceedings demonstrate the vitality of the community and will provide the grounds for a solid workshop program and what we expect will be a most enjoyable and enriching debate.Peer reviewe

Reputation-based trust evaluations through diversity

Non peer reviewedPostprin