GAMA: towards a physical understanding of galaxy formation

The Galaxy And Mass Assembly (GAMA) project is the latest in a tradition of large galaxy redshift surveys, and is now underway on the 3.9m Anglo-Australian Telescope at Siding Spring Observatory. GAMA is designed to map extragalactic structures on scales of 1kpc - 1Mpc in complete detail to a redshift of z~0.2, and to trace the distribution of luminous galaxies out to z~0.5. The principal science aim is to test the standard hierarchical structure formation paradigm of Cold Dark Matter (CDM) on scales of galaxy groups, pairs, discs, bulges and bars. We will measure (1) the Dark Matter Halo Mass Function (as inferred from galaxy group velocity dispersions); (2) baryonic processes, such as star formation and galaxy formation efficiency (as derived from Galaxy Stellar Mass Functions); and (3) the evolution of galaxy merger rates (via galaxy close pairs and galaxy asymmetries). Additionally, GAMA will form the central part of a new galaxy database, which aims to contain 275,000 galaxies with multi-wavelength coverage from coordinated observations with the latest international ground- and space-based facilities: GALEX, VST, VISTA, WISE, HERSCHEL, GMRT and ASKAP. Together, these data will provide increased depth (over 2 magnitudes), doubled spatial resolution (0.7"), and significantly extended wavelength coverage (UV through Far-IR to radio) over the main SDSS spectroscopic survey for five regions, each of around 50 deg^2. This database will permit detailed investigations of the structural, chemical, and dynamical properties of all galaxy types, across all environments, and over a 5 billion year timeline.Comment: GAMA overview which appeared in the October 2009 issue of Astronomy & Geophysics, ref: Astron.Geophys. 50 (2009) 5.1

Sanitation Is a Business: Approaches for Demand-Oriented Policies

This brochure summarizes case studies that have been taken from all over the world, showing that sanitation can be a viable business. It seeks to motivate policy makers and donors to embrace a new paradigm that advocates for a strong state, managing the potential of the private sector to provide sustainable and demand driven solutions to sanitation needs. The brochure adopts a strong poverty focus, but the recommendations are also meant to be useful in transition countries. The majority of businesses that generate income from sanitation are small enterprises, some coming from the informal sector. And it is the poor who stand to benefit most, if products are affordable and adjusted to their demands

Masses for the Local Group and the Milky Way

We use the very large Millennium Simulation of the concordance $\Lambda$CDM cosmogony to calibrate the bias and error distribution of Timing Argument estimators of the masses of the Local Group and of the Milky Way. From a large number of isolated spiral-spiral pairs similar to the Milky Way/Andromeda system, we find the interquartile range of the ratio of timing mass to true mass to be a factor of 1.8, while the 5% and 95% points of the distribution of this ratio are separated by a factor of 5.7. Here we define true mass as the sum of the ``virial'' masses $M_{200}$ of the two dominant galaxies. For current best values of the distance and approach velocity of Andromeda this leads to a median likelihood estimate of the true mass of the Local Group of 5.27\times 10^{12}\msun, or $\log M_{LG}/M_\odot = 12.72$, with an interquartile range of $[12.58, 12.83]$ and a 5% to 95% range of $[12.26, 13.01]$. Thus a 95% lower confidence limit on the true mass of the Local Group is 1.81\times 10^{12}\msun. A timing estimate of the Milky Way's mass based on the large recession velocity observed for the distant satellite Leo I works equally well, although with larger systematic uncertainties. It gives an estimated virial mass for the Milky Way of 2.43 \times 10^{12}\msun with a 95% lower confidence limit of 0.80 \times 10^{12}\msun.Comment: 11 pages, 6 figures, MNRAS accepted. Added a new discussion paragraph and a new figure regarding the relative transverse velocity but conclusions unchange

Genetics and insurance in the United Kingdom 1995-2010: the rise and fall of scientific discrimination

Around the millennium there was extensive debate in the United Kingdom of the possible use of predictive genetic tests by insurance companies. Many insurance experts, geneticists and public policymakers appeared to believe that genetic test results would soon become widely used by the insurance industry. This expectation has not been borne out. This article outlines the history of exaggerated perceptions of the significance of genetic test results to insurance, with particular reference to the United Kingdom, suggesting reasons why they arose and also why they have declined. The article concludes with some speculation about how policy on genetics and insurance might develop in future

GPU Accelerated Particle Visualization with Splotch

Splotch is a rendering algorithm for exploration and visual discovery in particle-based datasets coming from astronomical observations or numerical simulations. The strengths of the approach are production of high quality imagery and support for very large-scale datasets through an effective mix of the OpenMP and MPI parallel programming paradigms. This article reports our experiences in re-designing Splotch for exploiting emerging HPC architectures nowadays increasingly populated with GPUs. A performance model is introduced for data transfers, computations and memory access, to guide our re-factoring of Splotch. A number of parallelization issues are discussed, in particular relating to race conditions and workload balancing, towards achieving optimal performances. Our implementation was accomplished by using the CUDA programming paradigm. Our strategy is founded on novel schemes achieving optimized data organisation and classification of particles. We deploy a reference simulation to present performance results on acceleration gains and scalability. We finally outline our vision for future work developments including possibilities for further optimisations and exploitation of emerging technologies.Comment: 25 pages, 9 figures. Astronomy and Computing (2014

The Global Forum on Migration and Development: Perspectives from Asia and the Pacific

Several governments in the Asia-Pacific region have actively engaged in the United Nations' Global Forum on Migration and Development (GFMD) for the past seven years, as both participants and leaders. Virtually every country in the region has assigned representatives in GFMD's network of country focal points, eight Asia-Pacific countries are part of GFMD Steering Group, and a number have contributed to the roundtable and thematic meetings either as co-chairs or team members. Three countries from the region were also part of a 14-member Assessment Team that outlined the future of the Forum after 2012. The region's active engagement has helped shape the themes and topics of GFMD meetings, beginning with the first meeting convened in 2007. However, during this time, the challenges facing migrants and their families have not abated. To remain relevant, the GFMD must become as instrumental in shaping the reality on the ground as it has been in shaping the global discourse on migration and development. The 2012 GFMD assessment shows participant states' demand for a more development-focused and results-driven forum.The GFMD could provide more opportunities for collaboration between governments and other migration stakeholders. While becoming more action-oriented, it should continue to shape the agenda on migration and development and set international priorities among the wide range of issues that demands attention. Toward these ends, the GFMD would benefit from (1) an enhanced linkage with regional fora and processes; (2) a more dynamic people-to-people networking platform where policymakers can find partners, pilot projects, test ideas, and develop policy and programmatic tools; and (3) a more focused, action-oriented, and results-driven process for the next five years. This brief argues that although the Global Forum on Migration and Development was primarily designed as a venue for changing the discourse on migration, the success of its efforts to date and the pressing need for progress on the ground both indicate that it is time to assess how the Forum can facilitate concrete action

CP Violation Highlights: Circa 2005

Recent highlights in CP violation phenomena are reviewed. B-factory results imply that CP-violation phase in the CKM matrix is the dominant contributor to the observed CP violation in K and B-physics. Deviations from the predictions of the CKM-paradigm due to beyond the Standard Model CP-odd phase are likely to be a small perturbation. Therefore, large data sample of clean B's will be needed. Precise determination of the unitarity triangle, along with time dependent CP in penguin dominated hadronic and radiative modes are discussed. Null tests in B, K and top-physics and separate determination of the K-unitarity triangle are also emphasized.Comment: Invited talk at "Results and Perspectives in Particle Physics", La Thuile, Acosta Valley, Feb27-Mar3, 200

A Review on Biological Inspired Computation in Cryptology

Cryptology is a field that concerned with cryptography and cryptanalysis. Cryptography, which is a key technology in providing a secure transmission of information, is a study of designing strong cryptographic algorithms, while cryptanalysis is a study of breaking the cipher. Recently biological approaches provide inspiration in solving problems from various fields. This paper reviews major works in the application of biological inspired computational (BIC) paradigm in cryptology. The paper focuses on three BIC approaches, namely, genetic algorithm (GA), artificial neural network (ANN) and artificial immune system (AIS). The findings show that the research on applications of biological approaches in cryptology is minimal as compared to other fields. To date only ANN and GA have been used in cryptanalysis and design of cryptographic primitives and protocols. Based on similarities that AIS has with ANN and GA, this paper provides insights for potential application of AIS in cryptology for further research

The Architecture of Communal Living: Lessons from Arcosanti in Arizona

Paolo Soleri's arcology model (architecture + ecology addresses issues of sustainability by advocating living in a balanced relationship between urban morphology and performance within dense, integrated and compact structures. Within these structures material recycling, waste reduction and the use of renewable energy sources are adopted as part of a sustainable strategy aimed at reducing the flow of resources and energy through the urban system. Today, as governments, eager to deliver major environmental improvements, press on with as yet untried and largely untested 'centrist' policies of urban living, there is a need to research relevant models of the 'compact city' approach. Issues involved with the intensification in the use of space, higher residential densities, centralisation, compactness, the integration of land uses and aspects of self-containment need to be examined. Over the last ten years, as the criteria of sustainability have become more widely accepted and understood, the relevance of the Soleri's urban model has become clearer. Arcosanti, begun in 1970, offers a laboratory for testing the validity of Soleri's ideas. This paper examines arcology and Arcosanti within the context of sustainability. Since the energy crisis of the mid 1970s, efforts at Arcosanti have been directed toward the definition and testing of various architectural effects on a community-wide scale that could offer a response to many of today's environmental problems. But progress is painstakingly slow. Lacking the level of funding and resources that would enable it to be convincing, Arcosanti now represents not so much a specific prototypal solution, but an activist-engaged strategy that advocates the possibility of building our dreams and visions. In a world plagued by so many problems and so few alternatives, it nevertheless continues to offer a beacon of hope on the threshold of a new millennium