Human activities aggravate nitrogen-deposition pollution to inland water over China

In the past three decades, China has built more than 87 000 dams with a storage capacity of ≈6560 km³ and the total surface area of inland water has increased by 6672 km². Leaching of N from fertilized soils to rivers is the main source of N pollution in China, but the exposure of a growing inland water area to direct atmospheric N deposition and N leaching caused by N deposition on the terrestrial ecosystem, together with increased N deposition and decreased N flow, also tends to raise N concentrations in most inland waters. The contribution of this previously ignored source of  N deposition to freshwaters is estimated in this study, as well as mitigation strategies. The results show that the annual amounts of N depositions ranged from 4.9 to 16.6 kg · ha⁻¹ · yr⁻¹ in the 1990s to exceeding 20 kg · ha⁻¹ · yr⁻¹ in the 2010s over most of regions in China, so the total mass of ΔN (the net contribution of N deposition to the increase in N concentration) for lakes, rivers and reservoirs change from 122.26 Gg N · yr⁻¹ in the 1990s to 237.75 Gg N · yr⁻¹ in the 2010s. It is suggested that reducing the N deposition from various sources, shortening the water-retention time in dams and decreasing the degree of regulation for rivers are three main measures for preventing a continuous increase in the N-deposition pollution to inland water in China.     

Quantifying paedophile activity in a large P2P system

Increasing knowledge of paedophile activity in P2P systems is a crucial societal concern, with important consequences on child protection, policy making, and internet regulation. Because of a lack of traces of P2P exchanges and rigorous analysis methodology, however, current knowledge of this activity remains very limited. We consider here a widely used P2P system, eDonkey, and focus on two key statistics: the fraction of paedophile queries entered in the system and the fraction of users who entered such queries. We collect hundreds of millions of keyword-based queries; we design a paedophile query detection tool for which we establish false positive and false negative rates using assessment by experts; with this tool and these rates, we then estimate the fraction of paedophile queries in our data; finally, we design and apply methods for quantifying users who entered such queries. We conclude that approximately 0.25% of queries are paedophile, and that more than 0.2% of users enter such queries. These statistics are by far the most precise and reliable ever obtained in this domain.     

Entrepreneurial innovation: The importance of context

The purpose of this article and the special issue is to improve our understanding of the theoretical, managerial, and policy implications of entrepreneurial innovation. We accomplish this objective by examining the role of context in stimulating such activity, as well as its impact on the outcomes of entrepreneurial innovation. Our analysis begins by outlining an overarching framework for entrepreneurial innovation and context. With reference to this framework we then compare the attributes of national innovation systems, entrepreneurship and entrepreneurial innovation, and categorize contextual influences on entrepreneurial innovation. We then situate the papers presented in this special issue within this framework. We conclude by outlining an agenda for additional research on this topic, focusing on the relationships between contexts and entrepreneurial innovation and then discuss policy implications, focusing on how public and private actors can meet these challenges.     

Comparative outcomes of two instructional models for students with learning disabilities: inclusion with co‐teaching and solo‐taught special education

We compared two instructional models (co‐teaching inclusion and solo‐taught special education) for students with learning disabilities (LD) with regard to their effect on academic achievement and class attendance. Twelve inclusive classes (experimental group) and 13 special education classes (control group) participated in the study. In grade 1, there were eight inclusive classes and nine special education classes with a total of 353 students (195 without disabilities, 58 with LD in inclusion and 100 with LD in special education classes). The data were collected from academic tests. Although our results revealed no significant difference between the two models in terms of target population, objectives and assigned resources, significant differences were observed in the effects on student outcomes in reading/writing and on attendance, as the inclusion model was shown to be globally more effective compared with the special education setting.     

Europe Versus Emerging Countries Within FIFA: Using Inflation as a Conflict Regulation Mechanism

Abstract

As is the case within many international organizations, Fédération Internationale de Football Association (FIFA) is beset by internal tensions between the North, those nations which have historically held most power, and the South, mainly African and Asian countries, which look forward to a more balanced functioning. The numerous conflicts which arise in the governing body of association football usually takes the form of an opposition between regional confederations. The purpose of this article is to show that the regulation of these disputes may be considered as inflationist. The technique of playing on nominal factors such as the number of places in the executive committee or the number of countries participating the world cup can lead to concessions on real power sharing. This tactic is therefore used in FIFA when feasible.