Ludwig Feuerbach and the validity of religious experience: a modern study (historical, expository, and critical), with outline of contents, list of books consulted, summary of argument, and index

GENERAL AIM: To show that Feuerbach' theory of Religion as illusion is of present interest,.and further that there are not only defects and contradictions in this theory, but also elements presented with it which justify us in recognizing the validity of religious experience

Design and construction of a configurable full-field range imaging system for mobile robotic applications

Mobile robotic devices rely critically on extrospection sensors to determine the range to objects in the robot’s operating environment. This provides the robot with the ability both to navigate safely around obstacles and to map its environment and hence facilitate path planning and navigation. There is a requirement for a full-field range imaging system that can determine the range to any obstacle in a camera lens’ field of view accurately and in real-time. This paper details the development of a portable full-field ranging system whose bench-top version has demonstrated sub-millimetre precision. However, this precision required non-real-time acquisition rates and expensive hardware. By iterative replacement of components, a portable, modular and inexpensive version of this full-field ranger has been constructed, capable of real-time operation with some (user-defined) trade-off with precision

Persistent warmth across the Benguela upwelling system during the Pliocene epoch

A feature of Pliocene climate is the occurrence of “permanent El Niño-like” or “El Padre” conditions in the Pacific Ocean. From the analysis of sediment cores in the modern northern Benguela upwelling, we show that the mean oceanographic state off Southwest Africa during the warm Pliocene epoch was also analogous to that of a persistent Benguela “El Niño”. At present these events occur when massive southward flows of warm and nutrient-poor waters extend along the coasts of Angola and Namibia, with dramatic effects on regional marine ecosystems and rainfall. We propose that the persistent warmth across the Pliocene in the Benguela upwelling ended synchronously with the narrowing of the Indonesian seaway, and the early intensification of the Northern Hemisphere Glaciations around 3.0–3.5 Ma. The emergence of obliquity-related cycles in the Benguela sea surface temperatures (SST) after 3 Ma highlights the development of strengthened links to high latitude orbital forcing. The subsequent evolution of the Benguela upwelling system was characterized by the progressive intensification of the meridional SST gradients, and the emergence of the 100 ky cycle, until the modern mean conditions were set at the end of the Mid Pleistocene transition, around 0.6 Ma. These findings support the notion that the interplay of changes in the depth of the global thermocline, atmospheric circulation and tectonics preconditioned the climate system for the end of the warm Pliocene epoch and the subsequent intensification of the ice ages

Paisatges funeraris i diversitat a Anglaterra i a Gal·les: l'establiment d'una agenda = Deathscapes and diversity in England and Wales: setting an agenda

Aquest article se centra en una dimensió poc discutida, però important, de les experiències dels migrants i les minories a Anglaterra i Gal·les: els cementiris i crematoris de què disposen. Basat en una àmplia investigació amb comunitats locals i proveïdors de serveis en quatre ciutats casos d’estudi, aquest article ex-plora les diverses necessitats funeràries culturals i religioses a Anglaterra i Gal·les, els reptes que hi estan associats i les formes en què tant les comunitats com els proveïdors de serveis (p. ex.: planifica-dors i directors funeraris) hi responen. Destaquen vuit temes clau: i)l’oferta de cementiris; ii)l’oferta de crematoris; iii)l’oferta desigual per diferents grups migrants i minoritaris; iv)la diversitat en la diversitat; v)els canvis de patrons de repatriació;vi)el foment del diàleg;vii)la comprensió entre professionals icomunitats, i viii)la planificació dels cementiris com aespais de trobada.Este artículo se centra en una dimensión poco discutida pero importante de las experiencias de los migrantes y las mi-norías en Inglaterra y Gales: los cemen-terios y crematorios de que disponen. Basándose en una amplia investigación con comunidades locales y proveedores de servicios en cuatro ciudades casos de estudio, este artículo explora las diver-sas necesidades funerarias culturales y religiosas en Inglaterra y Gales, los retos asociados a estas y las formas en que tanto las comunidades como los provee-dores de servicios (p. ej.: planificadores y directores funerarios) responden a ellos. Destacan ocho temas clave: i)la oferta de cementerios; ii)la oferta de crematorios; iii)la oferta desigual por diferentes grupos migrantes y minoritarios; iv)la diversidad en la diversidad;v)los cambios de patrones de repatri-ación; vi)el fomento del diálogo;vii)la comprensión entre profesionalesy comunidades, y viii)la planificación de los cementerios como espacios de encuentro.This paper focuses on a little discussed but important dimension of migrant and minority experiences in England and Wales: cemetery and crematoria provi-sion. Based on extensive research with local communities and service providers in four case study towns, this paper explores the varied cultural and religious funerary needs in England and Wales, the associated challenges and the ways in which both communities and service providers (e.g. cemetery managers, town planners and funeral directors) respond to them. It highlights seven key themes, namely:i)cemetery provision;ii)crematorium provision;iii)unequal provision across migrantand minority groups;iv)diversity within diversity;v)changing patterns of repatriation; vi)fostering dialogue;vii)understanding between profession-als and communities; and viii)planning for cemeteries as spacesof encounter. / Este artículo se centra en una dimensión poco discutida pero importante de las experiencias de los migrantes y las mi-norías en Inglaterra y Gales: los cemen-terios y crematorios de que disponen. Basándose en una amplia investigación con comunidades locales y proveedores de servicios en cuatro ciudades casos de estudio, este artículo explora las diver-sas necesidades funerarias culturales y religiosas en Inglaterra y Gales, los retos asociados a estas y las formas en que tanto las comunidades como los provee-dores de servicios (p. ej.: planificadores y directores funerarios) responden a ellos. Destacan ocho temas clave: i)la oferta de cementerios; ii)la oferta de crematorios; iii)la oferta desigual por diferentes grupos migrantes y minoritarios; iv)la diversidad en la diversidad;v)los cambios de patrones de repatri-ación; vi)el fomento del diálogo;vii)la comprensión entre profesionalesy comunidades, y viii)la planificación de los cementerios como espacios de encuentro. / This paper focuses on a little discussed but important dimension of migrant and minority experiences in England and Wales: cemetery and crematoria provi-sion. Based on extensive research with local communities and service providers in four case study towns, this paper explores the varied cultural and religious funerary needs in England and Wales, the associated challenges and the ways in which both communities and service providers (e.g. cemetery managers, town planners and funeral directors) respond to them. It highlights seven key themes, namely:i)cemetery provision;ii)crematorium provision;iii)unequal provision across migrantand minority groups;iv)diversity within diversity;v)changing patterns of repatriation; vi)fostering dialogue;vii)understanding between profession-als and communities; and viii)planning for cemeteries as spacesof encounter

Orbital and Suborbital‐Scale Variations of Productivity and Sea Surface Conditions in the Gulf of Alaska During the Past 54,000 Years: Impact of Iron Fertilization by Icebergs and Meltwater

As a high-nutrient and low-chlorophyll region, the modern Gulf of Alaska (GoA) is strongly impacted by the limitation of iron. Paleostudies along the Alaskan slope have mainly focused on reconstructing environmental conditions over the past 18 ka. Based on micropaleontological, biogeochemical, and sedimentological parameters, we explore a sediment record covering the past 54 ka at Integrated Ocean Drilling Program Site U1419 to understand the impact of orbital- and suborbital-scale climate variability on productivity and sea-surface conditions. Close to the Cordilleran Ice Sheet (CIS), Site U1419 is ideally located to elucidate how the evolution of a large ice mass and glacial processes affected orbital- and suborbital-scale changes in nutrients (e.g., iron) supply. Meltwater discharge from the northern CIS impacted sea surface dynamics of GoA coastal waters. The corresponding increases in bulk biogenic concentrations during Marine Isotope Stage (MIS) 3 and MIS 2 (54–17 ka) suggests a direct impact from iron fertilization. The lack of a consistent relationship between productivity and SST suggests that cooling of surface waters was not the dominant control on primary producers. The inundation of the subaerially exposed continental shelf during the last deglacial (17–10 ka) warming could have served as a major micronutrient source, accounting for a deglacial peak in production. Low productivity after the last deglaciation suggests reduced iron availability, which we link to reduced meltwater inputs from smaller ice masses onshore. Our multiproxy approach reveals a more comprehensive picture of late Quaternary productivity variations compared to earlier studies along the Alaskan margin. The impact of tidewater glaciers and meltwater discharge on past marine productivity and nutrient budget dynamics of high-latitude coastal regions is discussed

‘That eccentric use of land at the top of the hill’: Cemeteries and stories of the city

Most contemporary research accounts for conflict within cemetery space, but does not consider the potentially contested and poorly understood role of cemeteries within their broader cityscape. This study draws on stories from cemetery managers across England and Wales to narrate this multifunctionality, as they hold the pivotal role which oversees both the day-to-day running of the cemetery, and its strategic role within a given municipality. The study outlines how cemeteries hold multiple functions in the cities in which they are located, specifically contributing to greenspace or green infrastructure, civic identity and local place attachment. These varying city level roles in turn impact on what is deemed (il)legitimate behaviour within the cemetery. Moreover, they raise important considerations for urban planners and policymakers who currently have little guidance on planning for new or existing cemeteries but are critical in the ongoing successful development of cities

Estimating the furrow infiltration characteristic from a single advance point

Management and control of surface irrigation, in particular furrow irrigation, is limited by spatio-temporal soil infiltration variability as well as the high cost and time associated with collecting intensive field data for estimation of the infiltration characteristics. Recent work has proposed scaling the commonly used infiltration function by using a model infiltration curve and a single advance point for every other furrow in an irrigation event. Scaling factors were calculated for a series of furrows at two sites and at four points down the length of the field (0.25 L, 0.5 L, 0.75 L and L). Differences in the value of the scaling factor with distance were found to be a function of the shape of the advance curves. It is concluded that use of points early in the advance results in a substantial loss of accuracy and should be avoided. The scaling factor was also strongly correlated with the furrow-wetted perimeter suggesting that the scaling is an appropriate way of both predicting and accommodating the effect of the hydraulic variability

Biomarker proxies for reconstructing Quaternary climate and environmental change

To reconstruct past environmental changes, a range of indirect or proxy approaches can be applied to Quaternary archives. Here, we review the complementary and novel insights which have been provided by the analysis of chemical fossils (biomarkers). Biomarkers have a biological source that can be highly specific (e.g., produced by a small group of organisms) or more general. We show that biomarkers are able to quantify key climate variables (particularly water and air temperature) and can provide qualitative evidence for changes in hydrology, vegetation, human-environment interactions and biogeochemical cycling. In many settings, biomarker proxies provide the opportunity to simultaneously reconstruct multiple climate or environmental variables, alongside complementary and long-established approaches to palaeo-environmental reconstruction. Multi-proxy studies have provided rich sets of data to explore both the drivers and impacts of palaeo-environmental change. As new biomarker proxies continue to be developed and refined, there is further potential to answer emerging questions for Quaternary science and environmental change

Chromospheric magnetic field and density structure measurements using hard X-rays in a flaring coronal loop

<p><b>Aims:</b> A novel method of using hard X-rays as a diagnostic for chromospheric density and magnetic structures is developed to infer sub-arcsecond vertical variation of magnetic flux tube size and neutral gas density.</p> <p><b>Methods:</b> Using Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) X-ray data and the newly developed X-ray visibilities forward fitting technique we find the FWHM and centroid positions of hard X-ray sources with sub-arcsecond resolution (~0.2'') for a solar limb flare. We show that the height variations of the chromospheric density and the magnetic flux densities can be found with an unprecedented vertical resolution of ~150 km by mapping 18-250 keV X-ray emission of energetic electrons propagating in the loop at chromospheric heights of 400-1500 km.</p> <p><b>Results:</b> Our observations suggest that the density of the neutral gas is in good agreement with hydrostatic models with a scale height of around 140 30 km. FWHM sizes of the X-ray sources decrease with energy suggesting the expansion (fanning out) of magnetic flux tubes in the chromosphere with height. The magnetic scale height B(z)(dB/dz)-1 is found to be of the order of 300 km and a strong horizontal magnetic field is associated with noticeable flux tube expansion at a height of ~900 km.</p&gt

Late Pliocene Cordilleran Ice Sheet development with warm northeast Pacific sea surface temperatures

The initiation and evolution of the Cordilleran Ice Sheet are relatively poorly constrained. International Ocean Discovery Program (IODP) Expedition 341 recovered marine sediments at Site U1417 in the Gulf of Alaska (GOA). Here we present alkenone-derived sea surface temperature (SST) analyses alongside ice-rafted debris (IRD), terrigenous, and marine organic matter inputs to the GOA through the late Pliocene and early Pleistocene. The first IRD contribution from tidewater glaciers in southwest Alaska is recorded at 2.9 Ma, indicating that the Cordilleran Ice Sheet extent increased in the late Pliocene. A higher occurrence of IRD and higher sedimentation rates in the GOA during the early Pleistocene, at 2.5 Ma, occur in synchrony with SSTs warming on the order of 1 degrees C relative to the Pliocene. All records show a high degree of variability in the early Pleistocene, indicating highly efficient ocean-climate-ice interactions through warm SST-ocean evaporation-orographic precipitation-ice growth mechanisms. A climatic shift towards ocean circulation in the subarctic Pacific similar to the pattern observed during negative Pacific Decadal Oscillation (PDO) conditions today occurs with the development of more extensive Cordilleran glaciation and may have played a role through increased moisture supply to the subarctic Pacific. The drop in atmospheric CO2 concentrations since 2.8 Ma is suggested as one of the main forcing mechanisms driving the Cordilleran glaciation