Potential Gains from Mergers in Local Public Transport: An Efficiency Analysis Applied to Germany

We analyze potential gains from hypothetical mergers in local public transport using the non-parametric Data Envelopment Analysis with bias corrections by means of bootstrapping. Our sample consists of 41 public transport companies from Germany's most densely populated region, North Rhine-Westphalia. We merge them into geographically meaningful, larger units that operate partially on a joint tram network. Merger gains are then decomposed into individual technical efficiency, synergy and size effects following the methodology of Bogetoft and Wang [Bogetoft, P., Wang, D., 2005. Estimating the Potential Gains from Mergers. Journal of Productivity Analysis, 23(2), 145-171]. Our empirical findings suggest that substantial gains up to 16 percent of factor inputs are present, mainly resulting from synergy effects.Merger, Public Transport, Efficiency, Data Envelopment Analysis

Chaetocladius Kieffer (Diptera: Chironomidae) in China

Chaetocladius Kieffer in China is reviewed and a key to the males is provided. There are five Chinese species, of which three are described and illustrated as adultmales: C. absolutus Wang, Kong & Wang, sp. n., C. tibetensis Wang, Kong & Wang, sp. n. and C. triquetrus Wang, Kong & Wang, sp. n. Chaetocladius oyabevenustus Sasa, Kawai & Ueno is recorded from China for the first time

PLURALISM ABOUT TRUTH IN EARLY CHINESE PHILOSOPHY: A REFLECTION ON WANG CHONGS APPROACH

The debate concerning truth in Classical Chinese philosophy has for the most part avoided the possibility that pluralist theories of truth were part of the classical philosophical framework. I argue that the Eastern Han philosopher Wang Chong (c. 25-100 CE) can be profitably read as endorsing a kind of pluralism about truth grounded in the concept of shi 實, or actuality . In my exploration of this view, I explain how it offers a different account of the truth of moral and non-moral statements, while still retaining the univocality of the concept of truth (that is, that the concept amounts to more than the expression of a disjunction of various truth properties), by connecting shi with normative and descriptive facts about how humans appraise statements. In addition to providing insight into pluralist views of truth in early China, the unique pluralist view implicit in Wang\u27 work can help solve problems with contemporary pluralist theories of truth

Unsupervised learning of generative topic saliency for person re-identification

(c) 2014. The copyright of this document resides with its authors. It may be distributed unchanged freely in print or electronic forms.© 2014. The copyright of this document resides with its authors. Existing approaches to person re-identification (re-id) are dominated by supervised learning based methods which focus on learning optimal similarity distance metrics. However, supervised learning based models require a large number of manually labelled pairs of person images across every pair of camera views. This thus limits their ability to scale to large camera networks. To overcome this problem, this paper proposes a novel unsupervised re-id modelling approach by exploring generative probabilistic topic modelling. Given abundant unlabelled data, our topic model learns to simultaneously both (1) discover localised person foreground appearance saliency (salient image patches) that are more informative for re-id matching, and (2) remove busy background clutters surrounding a person. Extensive experiments are carried out to demonstrate that the proposed model outperforms existing unsupervised learning re-id methods with significantly simplified model complexity. In the meantime, it still retains comparable re-id accuracy when compared to the state-of-the-art supervised re-id methods but without any need for pair-wise labelled training data