Experiences from semantic web service tutorials

We have given around 20 tutorials on Semantic Web Services in international events during the last two years. This position paper presents our experiences and depicts central aspects relevant for education, dissemination and exploitation of Semantic Web and Semantic Web service technologies in academia and industry

An Internet-Based Tool for Weather Risk Management

This paper introduces a web-based computer program designed to evaluate weather risk man-agement and weather insurance in the United States. The paper outlines the economics of weather risk in terms of agricultural production and household well-being; defines weather risk in terms of intensity, duration, and frequency; and illustrates the computer program use by comparing heat and precipitation risks at Ardmore, Oklahoma, and Ithaca, New York.weather insurance, heat insurance, precipitation insurance, crop insurance, weather derivatives, Risk and Uncertainty,

Self-organized dynamics and the transition to turbulence of confined active nematics

We study how confinement transforms the chaotic dynamics of bulk microtubule-based active nematics into regular spatiotemporal patterns. For weak confinements, multiple continuously nucleating and annihilating topological defects self-organize into persistent circular flows of either handedness. Increasing confinement strength leads to the emergence of distinct dynamics, in which the slow periodic nucleation of topological defects at the boundary is superimposed onto a fast procession of a pair of defects. A defect pair migrates towards the confinement core over multiple rotation cycles, while the associated nematic director field evolves from a distinct double spiral towards a nearly circularly symmetric configuration. The collapse of the defect orbits is punctuated by another boundary-localized nucleation event, that sets up long-term doubly-periodic dynamics. Comparing experimental data to a theoretical model of an active nematic, reveals that theory captures the fast procession of a pair of $+\frac{1}{2}$ defects, but not the slow spiral transformation nor the periodic nucleation of defect pairs. Theory also fails to predict the emergence of circular flows in the weak confinement regime. The developed confinement methods are generalized to more complex geometries, providing a robust microfluidic platform for rationally engineering two-dimensional autonomous flows

Rituals Alleviate Grieving for Loved Ones, Lovers, and Lotteries

Three experiments explored the impact of mourning rituals after losses—of loved ones, lovers, and lotteries—on mitigating grief. Participants who were directed to reflect on past rituals or who were assigned to complete novel rituals after experiencing losses reported lower levels of grief. Increased feelings of control after rituals mediated the link between use of rituals and reduced grief after losses, and the benefits of rituals accrued not only to individuals who professed a belief in rituals’ effectiveness but also those who did not. Although the specific rituals in which people engage after losses vary widely by culture and religion—and among our participants—our results suggest a common psychological mechanism underlying their effectiveness: regained feelings of control

Matchmaking Promotes Happiness

Four studies document and explore the psychology underlying people's proclivity to connect people to each other—to play "matchmaker." First, Study 1 shows that chronic matchmaking is associated with higher well-being. Studies 2 and 3 show that matching others on the basis of how well they will get along leads to a greater increase in happiness and is more intrinsically rewarding than other tasks (e.g., deciding which people would not get along). Study 4 investigates a moderator of the rewarding nature of matchmaking: the type of connection. We show that bridging ties are relatively more attractive than bonding ties: the more unlikely the match, the more rewarding it is. Taken together, these studies provide correlational and causal evidence for the role of matchmaking in promoting happiness

Feeling Good about Giving: The Benefits (and Costs) of Self-Interested Charitable Behavior

In knowledge-intensive settings such as product or software development, fluid teams of individuals with different sets of experience are tasked with projects that are critical to the success of their organizations. Although building teams from individuals with diverse prior experience is increasingly necessary, prior work examining the relationship between experience and performance fails to find a consistent effect of diversity in experience on performance. The problem is that diversity in experience improves a team's information processing capacity and knowledge base, but also creates coordination challenges. We hypothesize that team familiarity - team members' prior experience working with one another - is one mechanism that helps teams leverage the benefits of diversity in team member experience by alleviating coordination problems that diversity creates. We use detailed project- and individual-level data from an Indian software services firm to examine the effects of team familiarity and diversity in experience on performance for software development projects. We find the interaction of team familiarity and diversity in experience has a complementary effect on a project being delivered on time and on budget. In team familiarity, we identify one mechanism for capturing the performance benefits of diversity in experience and provide insight into how the management of experience accumulation affects team performance.Diversity, Experience, Knowledge, Software, Team Familiarity

FARM-HOUSEHOLD ANALYSIS OF POLICIES AFFECTING PEANUT PRODUCTION IN SENEGAL

A farm-level survey of 150 households was conducted in the peanut basin of Senegal, and a profit function system estimated, for the purpose of analyzing the effects of policies affecting the peanut sector. Producer price of peanuts has relatively little effect on production, but producer price of millet influences peanut seed demand.Agricultural and Food Policy, Demand and Price Analysis,

Some remarks on the notions of general covariance and background independence

In the first part of this paper I review some of the difficulties that seem to obstruct generally valid definitions of "general covariance" and/or "background independence" The second and more historical part deals with a rather strange argument that Einstein put forward in his 1913 "Entwurf paper" with M. Grossmann to discredit scalar theories of gravity in order to promote general covariance.Comment: 26 pages, 3 figures. Contribution to ``An assessment of current paradigms in the physics of fundamental interactions'', edited by I.O. Stamatescu (Springer Verlag, to appear