Making water privatisation illegal: new laws in Netherlands and Uruguay

Both Uruguay and Netherlands are legislating to make privatisation of water illegal. This report describes the processes and discusses the context of international laws

Experimental Analysis of Algorithms for Coflow Scheduling

Modern data centers face new scheduling challenges in optimizing job-level performance objectives, where a significant challenge is the scheduling of highly parallel data flows with a common performance goal (e.g., the shuffle operations in MapReduce applications). Chowdhury and Stoica introduced the coflow abstraction to capture these parallel communication patterns, and Chowdhury et al. proposed effective heuristics to schedule coflows efficiently. In our previous paper, we considered the strongly NP-hard problem of minimizing the total weighted completion time of coflows with release dates, and developed the first polynomial-time scheduling algorithms with O(1)-approximation ratios. In this paper, we carry out a comprehensive experimental analysis on a Facebook trace and extensive simulated instances to evaluate the practical performance of several algorithms for coflow scheduling, including the approximation algorithms developed in our previous paper. Our experiments suggest that simple algorithms provide effective approximations of the optimal, and that the performance of our approximation algorithms is relatively robust, near optimal, and always among the best compared with the other algorithms, in both the offline and online settings.Comment: 29 pages, 8 figures, 11 table

Dogmatic development : privatisation and conditionalities in six countries a PSIRU report for War on Want

This report looks at how conditionalities and pressures from aid agencies and development banks force developing countries to adopt privatisation policies in public services. It focuses specifically on the sectors of water, electricity, and healthcare, in six countries: Colombia; El Salvador; Indonesia; Mozambique; South Africa; and Sri Lanka. It examines the impact of the requirements and policies of the International Monetary Fund (IMF), World Bank (WB), and other agencies including regional development banks, the European Commission (EC) and donor countries. It includes a specific examination of the various ways in which the UK’s Department for International Development (DFID) supports privatisation in these services. It concludes that the pressures for privatisation have been strengthened through new structures of ‘globalised aid’; that they create serious limitations on independent decision-making by developing countries, and generate some strong political responses; and that policies of development banks and donor agencies, including DFID, should be reviewed to remove such pressures and ensure that policy-making in developing countries is determined by local democratic processes

How Context Matters: Predicting Men's Homophobic Slang Use

This is the Author's Pre-Print. The journal's official website is: http://jls.sagepub.com.This manuscript reports two experiments exploring heterosexual men’s use of homophobic slang in social contexts, varied by sex-ratio. Study 1 (N = 127) experimentally demonstrated that compared to a mixed-sex audience, heterosexual men with an all-male audience reported higher levels of hetero-identity concern (HIC) and more homophobic slang use; these men had similar levels of HIC compared to men with an all-female audience. Study 2 replicated Study 1’s mean difference tests, and explored whether the relationship between HIC and homophobic slang was affected by group sex-ratio and social norms. Results suggest the relationship between HIC and homophobic slang was significant only in all-male and mixed-sex audiences, and the norm of noninterference was predictive of homophobic slang only in all-male groups

Solving the Hierarchy Problem with a Light Singlet and Supersymmetric Mass Terms

A generalization of the Next-to-Minimal Supersymmetric Model (NMSSM) is studied in which an explicit \mu-term as well as a small supersymmetric mass term for the singlet superfield are incorporated. We study the possibility of raising the Standard Model-like Higgs mass at tree level through its mixing with a light, mostly-singlet, CP-even scalar. We are able to generate Higgs boson masses up to 145 GeV with top squarks below 1.1 TeV and without the need to fine tune parameters in the scalar potential. This model yields light singlet-like scalars and pseudoscalars passing all collider constraints.Comment: 14 pages, 4 figure

Scheduling MapReduce Jobs under Multi-Round Precedences

We consider non-preemptive scheduling of MapReduce jobs with multiple tasks in the practical scenario where each job requires several map-reduce rounds. We seek to minimize the average weighted completion time and consider scheduling on identical and unrelated parallel processors. For identical processors, we present LP-based O(1)-approximation algorithms. For unrelated processors, the approximation ratio naturally depends on the maximum number of rounds of any job. Since the number of rounds per job in typical MapReduce algorithms is a small constant, our scheduling algorithms achieve a small approximation ratio in practice. For the single-round case, we substantially improve on previously best known approximation guarantees for both identical and unrelated processors. Moreover, we conduct an experimental analysis and compare the performance of our algorithms against a fast heuristic and a lower bound on the optimal solution, thus demonstrating their promising practical performance

Carcass composition of the giraffe Giraffa camelopardalis giraffa

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About the stability of the dodecatoplet

A new investigation is done of the possibility of binding the "dodecatoplet", a system of six top quarks and six top antiquarks, using the Yukawa potential mediated by Higgs exchange. A simple variational method gives a upper bound close to that recently estimated in a mean-field calculation. It is supplemented by a lower bound provided by identities among the Hamiltonians describing the system and its subsystems.Comment: 5 pages, two figures merged, refs. added, typos correcte

Quantum fluctuations as deviation from classical dynamics of ensemble of trajectories parameterized by unbiased hidden random variable

A quantization method based on replacement of c-number by c-number parameterized by an unbiased hidden random variable is developed. In contrast to canonical quantization, the replacement has straightforward physical interpretation as statistical modification of classical dynamics of ensemble of trajectories, and implies a unique operator ordering. We then apply the method to develop quantum measurement without wave function collapse \'a la pilot-wave theory.Comment: 14 pages, accepted in Physica

Risk of Population Extinction from Periodic and Abrupt Changes of Environment

A simulation model of a population having internal (genetic) structure is presented. The population is subject to selection pressure coming from the environment which is the same in the whole system but changes in time. Reproduction has a sexual character with recombination and mutation. Two cases are considered - oscillatory changes of the environment and abrupt ones (catastrophes). We show how the survival chance of a population depends on maximum allowed size of the population, the length of the genotypes characterising individuals, selection pressure and the characteristics of the climate changes, either their period of oscillations or the scale of the abrupt shift.Comment: 8 pages, 25 references, 10 figures; preliminary version to be submitted to Physica