Overture POI data for the United Kingdom: a comprehensive, queryable open data product

Point of Interest data that is comprehensive, globally-available and open-access, is sparse, despite being important inputs for research in a number of application areas. New data from the Overture Maps Foundation offers significant potential in this arena, but accessing the data relies on computational resources beyond the skillset and capacity of the average researcher. In this article, we provide a processed version of the Overture places (POI) dataset for the UK, in a fully-queryable format, and provide accompanying code through which to explore the data, and generate other national subsets. In the article, we describe the construction and characteristics of the dataset, before considering how reliable it is (locational accuracy, attribute comprehensiveness), through direct comparison with Geolytix supermarket data. This dataset can support new and important research projects in a variety of different thematic areas, and foster a network of researchers to further evaluate its advantages and limitations.Comment: Main document: 6 pages, 1 figure, 2 tables. Supplementary: 2 pages, 2 figures, 1 tabl

Down on the Farm: NAFTA's Seven-Years War on Farmers and Ranchers in Florida

In the summer of 2001, family farmers and ranchers throughout North America are struggling. During the 1993 debate over the fate of the North American Free Trade Agreement (NAFTA), Florida farmers and ranchers as well as farm communities across the U.S. were promised that NAFTA would provide access to new export markets and thus would finally bring a lasting solution to farmers off-and-on struggles for economic success. Now, seven years later, the evidence shows the income of independent Florida farmers has declined, consumer prices have risen while some giant agribusinesses have reaped huge profits. Florida has lost 1,000 small and medium sized farms since NAFTA went into effect. Total net income for "farm operations" in Florida increased between 1993 and 1999 but all of the income gain was in corporate farms. When corporate income increases are eliminated farm income drops steeply in Florida. During the seven years of NAFTA, net farm income for non-corporate Florida farm operations fell 74.4% between 1993 and 1999 from $51.4 million to$13.4 million. These bad outcomes for independent farmers are defining the growing national debates over President Bush s proposals to establish Fast Track trade authority and to expand NAFTA to 31 other Latin American and Caribbean nations through the Free Trade Area of the Americas (FTAA). This report documents the results that are causing farmers concern about NAFTA and its model of export-oriented agriculture. This special Florida supplement to a recent national report on NAFTA s agriculture-sector outcomes examines the impact of NAFTA on Florida farmers. For the past seven years, Florida vegetable growers, especially tomato and bell pepper growers, have been facing intense pressure from increasing imported vegetables from Mexico. Florida s citrus crop, the jewel of Florida s agriculture production, is already facing increased pressure from Mexico and will face even further import threats if President Bush is granted Fast Track trade authority. President Bush has announced he is seeking trade authority to negotiate FTAA NAFTA expansion which could result in Florida facing severe competition from powerhouse citrus producer Brazil. Farmers raising beef cattle in Florida who have seen incomes decline as farmgate prices for beef have collapsed in Florida under NAFTA would face new FTAA imports from beef giants Argentina and Brazil. Moreover, sugarcane farmers, who received special protection from Mexican sugar imports when NAFTA was negotiated, face even greater threats from FTAA nation Brazil which dominates the world sugar trade. Brazil has announced that access tothe U.S. for its citrus, beef, and sugar is a non-negotiable requirement for any FTAA deal. The complete executive summary and access to the full report are available via the link below

Down on the Farm: NAFTA's Seven-Years War on Farmers and Ranchers in the U.S., Canada and Mexico

In the summer of 2001, family farmers and ranchers throughout North America are struggling.During the 1993 debate over the fate of the North American Free Trade Agreement (NAFTA), U.S. farmers and ranchers were promised that NAFTA would provide access to new export markets and thus would finally bring a lasting solution to farmers' off-and-on struggles for economic success.Now, seven years later, the evidence shows farm income has declined, consumer prices have risen and some giant agribusinesses have reaped huge profits. These outcomes are defining the growing national debates over President Bush's proposals to establish Fast Track trade authority and to expand NAFTA through the Free Trade Area of the Americas (FTAA).This report reveals the basis for farmers' concern about NAFTA and its model of export-oriented agriculture. For the past seven years, Midwestern and Plains states wheat farmers; ranchers in Montana, Texas and other states; vegetable, flower and fruit growers in California; lumber mill owners in Louisiana, Arkansas and Washington; vegetable growers in Florida; chicken farmers nationwide and others have suffered declining commodity prices and farm income while a flood of NAFTA imports outpaced U.S. exports to Canada and Mexico.Yet it was not farmers in Mexico or Canada who benefitted from U.S. farmers' woes. Millions of campesinos throughout Mexico have lost a significant source of income and left their small corn farms. Some became farm laborers working in squalid conditions for poverty wages on large plantations growing produce for export to the U.S. Others moved to Mexico's cities where unemployment is high. Canadian grain and dairy farmers also face steeply rising debt during the NAFTA era. This report also documents the rise in Mexican staple food prices, such as in tortilla prices, even as the price paid to Mexican corn farmers dropped 48%.However, NAFTA has brought seven years of good fortune to many of the agribusinesses that pressured Washington, Ottawa and Mexico City to negotiate and ratify NAFTA's corporate- managed trade terms. Since NAFTA stripped away many safeguards for the folks who produce raw agricultural products, relative power and leverage has grown for large agribusiness conglomerates to exert pressure on both farmers and consumers.In Washington D.C., the Bush Administration is pushing forward with an ambitious plan to expand the NAFTA model throughout the hemisphere through FTAA. President George W. Bush and his principal trade policy advisors have stated that they intend to make the debate about NAFTA expansion and Fast Track (which they want to rename "Presidential Trade Promotion Authority") a referendum on NAFTA.Public Citizen agrees that the debate over NAFTA expansion ­ indeed, the national conversation about the premises and direction of U.S. trade policy ­ should be decided on the basis of the real-life results of NAFTA and the model on which it is based.In this report, we show how independent farmers in the U.S., Mexico and Canada have seen agricultural prices plummet, farm incomes collapse and critical domestic agriculture safety net programs dismantled. International free trade agreements and the domestic policies which furthered implementation of the export-oriented model, such as the U.S. "Freedom to Farm Act," have proved to benefit only the largest agribusinesses while the majority of farmers and consumers have lost

Using unstable data from mobile phone applications to examine recent trajectories of retail centre recovery.

The COVID-19 pandemic has changed the ways in which we shop, with significant impacts on retail and consumption spaces. Yet, empirical evidence of these impacts, specifically at the national level, or focusing on latter periods of the pandemic remain notably absent. Using a large spatio-temporal mobility dataset, which exhibits significant temporal instability, we explore the recovery of retail centres from summer 2021 to 2022, considering in particular how these responses are determined by the functional and structural characteristics of retail centres and their regional geography. Our findings provide important empirical evidence of the multidimensionality of retail centre recovery, highlighting in particular the importance of composition, e-resilience and catchment deprivation in determining such trajectories, and identifying key retail centre functions and regions that appear to be recovering faster than others. In addition, we present a use case for mobility data that exhibits temporal stability, highlighting the benefits of viewing mobility data as a series of snapshots rather than a complete time series. It is our view that such data, when controlling for temporal stability, can provide a useful way to monitor the economic performance of retail centres over time, providing evidence that can inform policy decisions, and support interventions to both acute and longer-term issues in the retail sector

NuSTAR observations of the powerful radio-galaxy Cygnus A

We present NuSTAR observations of the powerful radio galaxy Cygnus A, focusing on the central absorbed active galactic nucleus (AGN). Cygnus A is embedded in a cool-core galaxy cluster, and hence we also examine archival XMM-Newton data to facilitate the decomposition of the spectrum into the AGN and intracluster medium (ICM) components. NuSTAR gives a source-dominated spectrum of the AGN out to >70keV. In gross terms, the NuSTAR spectrum of the AGN has the form of a power law (Gamma~1.6-1.7) absorbed by a neutral column density of N_H~1.6x10^23 cm^-2. However, we also detect curvature in the hard (>10keV) spectrum resulting from reflection by Compton-thick matter out of our line-of-sight to the X-ray source. Compton reflection, possibly from the outer accretion disk or obscuring torus, is required even permitting a high-energy cutoff in the continuum source; the limit on the cutoff energy is E_cut>111keV (90% confidence). Interestingly, the absorbed power-law plus reflection model leaves residuals suggesting the absorption/emission from a fast (15,000-26,000km/s), high column-density (N_W>3x10^23 cm^-2), highly ionized (xi~2,500 erg cm/s) wind. A second, even faster ionized wind component is also suggested by these data. We show that the ionized wind likely carries a significant mass and momentum flux, and may carry sufficient kinetic energy to exercise feedback on the host galaxy. If confirmed, the simultaneous presence of a strong wind and powerful jets in Cygnus A demonstrates that feedback from radio-jets and sub-relativistic winds are not mutually exclusive phases of AGN activity but can occur simultaneously.Comment: 13 pages; accepted for publication in The Astrophysical Journa

The COSMOS AGN Spectroscopic Survey I: XMM Counterparts

We present optical spectroscopy for an X-ray and optical flux-limited sample of 677 XMM-Newton selected targets covering the 2 deg^2 COSMOS field, with a yield of 485 high-confidence redshifts. The majority of the spectra were obtained over three seasons (2005-2007) with the IMACS instrument on the Magellan (Baade) telescope. We also include in the sample previously published Sloan Digital Sky Survey spectra and supplemental observations with MMT/Hectospec. We detail the observations and classification analyses. The survey is 90% complete to flux limits of f_{0.5-10 keV}>8 x 10^-16 erg cm^-2 s^-1 and i_AB+<22, where over 90% of targets have high-confidence redshifts. Making simple corrections for incompleteness due to redshift and spectral type allows for a description of the complete population to $i_AB+<23. The corrected sample includes 57% broad emission line (Type 1, unobscured) AGN at 0.13<z<4.26, 25% narrow emission line (Type 2, obscured) AGN at 0.07<z<1.29, and 18% absorption line (host-dominated, obscured) AGN at 0<z<1.22 (excluding the stars that made up 4% of the X-ray targets). We show that the survey's limits in X-ray and optical flux include nearly all X-ray AGN (defined by L_{0.5-10 keV}>3 x 10^42 erg s^-1) to z<1, of both optically obscured and unobscured types. We find statistically significant evidence that the obscured to unobscured AGN ratio at z<1 increases with redshift and decreases with luminosity.Comment: Accepted for publication in the ApJ. 31 pages, 17 figures. Table 2 is available on reques

Ionization structure and Fe Kα\alpha energy for irradiated accretion disks

We study the radial ionization structure at the surface of an X-ray illuminated accretion disk. We plot the expected iron K$\alpha$ line energy as a function of the Eddington ratio and of the distance of the emitting matter from the central source, for a non-rotating and a maximally-rotating black hole. We compare the predicted disk line energies with those measured in an archival sample of active galactic nuclei observed with {\it Chandra}, {\it XMM-Newton} and {\it Suzaku}, and discuss whether the line energies are consistent with the radial distances inferred from reverberation studies. We also suggest using rapidly-variable iron K$\alpha$ lines to estimate the viscosity parameter of an accretion disk. There is a forbidden region in the line energy versus Eddington ratio plane, at low Eddington ratios, where an accretion disk cannot produce highly-ionized iron K$\alpha$ lines. If such emission is observed in low-Eddington-ratio sources, it is either coming from a highly-ionized outflow, or is a blue-shifted component from fast-moving neutral matter.Comment: 5 pages, 2 figures, accepted by MNRA

The Nature of Optically Dull Active Galactic Nuclei in COSMOS

We present infrared, optical, and X-ray data of 48 X-ray bright, optically dull AGNs in the COSMOS field. These objects exhibit the X-ray luminosity of an active galactic nucleus (AGN) but lack broad and narrow emission lines in their optical spectrum. We show that despite the lack of optical emission lines, most of these optically dull AGNs are not well-described by a typical passive red galaxy spectrum: instead they exhibit weak but significant blue emission like an unobscured AGN. Photometric observations over several years additionally show significant variability in the blue emission of four optically dull AGNs. The nature of the blue and infrared emission suggest that the optically inactive appearance of these AGNs cannot be caused by obscuration intrinsic to the AGNs. Instead, up to ~70% of optically dull AGNs are diluted by their hosts, with bright or simply edge-on hosts lying preferentially within the spectroscopic aperture. The remaining ~30% of optically dull AGNs have anomalously high f_x/f_o ratios and are intrinsically weak, not obscured, in the optical. These optically dull AGNs are best described as a weakly accreting AGN with a truncated accretion disk from a radiatively inefficient accretion flow.Comment: 12 pages, 10 figures. Accepted for publication in the Ap