Organisers of crowd mapping initiatives seek to identify practices that foster an active contributor community. Theory suggests that social contribution settings can provide important support functions for newcomers, yet to date there are no empirical studies of such an effect. We present the first study that evaluates the relationship between colocated practice and newcomer retention in a crow...

WISP1, as a member of the CCN4 protein family, has cell protective effects of promoting cell proliferation and inhibiting cell apoptosis. Although some studies have confirmed that WISP1 is concerned with colon cancer and lung cancer, there is little report about the influence of WISP1 in traumatic brain injury. Here, we found that the expression of WISP1 mRNA and protein decreased at 3 d and th...

Large scale distributed computing infrastructures pose challenging resource management problems, which could be addressed by adopting one of two perspectives. On the one hand, the problem could be framed as a global optimization that aims to minimize some notion of system-wide (social) cost. On the other hand, the problem could be framed in a game-theoretic setting whereby rational, selfish use...

Hadoop has become an attractive platform for large-scale data analytics. In this paper, we identify a major performance bottleneck of Hadoop: its lack of ability to colocate related data on the same set of nodes. To overcome this bottleneck, we introduce CoHadoop, a lightweight extension of Hadoop that allows applications to control where data are stored. In contrast to previous approaches, CoH...

Contemporary competitive demands have forced many organizations to increase levels of flexibility and adaptability in their operations. A growing number of such organizations have explored the virtual environment as one means of achieving increased responsiveness. In particular, the use of virtual teams appears to be on the increase. However, the increased use of virtual teams has not been acco...

The 5th International Planning Competition will be colocated with ICAPS-06. This IPC edition will contain a track on nondeterministic and probabilistic planning as the continuation of the probabilistic track at IPC-4. The non-deterministic track will evaluate systems for conformant, non-deterministic and probabilistic planning under different criteria. This document describes the general goals ...

Abstract. Four correction models with differing forms were developed on a training dataset of 32 PurpleAir–Federal Equivalent Method (FEM) hourly fine particulate matter (PM2.5) observation colocation sites across North America (NA). These evaluated in comparison four existing from external sources using the data 15 additional NA sites. Colocation determined automatically based proximity and no...

Finding suitable employment in a city is more challenging for married than unmarried migrants. This paper provides empirical evidence that the denser and diversified labor markets large cities help alleviate colocation problem of couples. Using data from China, we show gender wage gap among migrants significantly smaller larger cities, this mainly because have higher employer population densiti...