Testing Luminescence Dating Methods for Small Samples from Very Young Fluvial Deposits

The impetus behind this study is to understand the sedimentological dynamics of very young fluvial systems in the Amazon River catchment and relate these to land use change and modern analogue studies of tidal rhythmites in the geologic record. Initial quartz optically stimulated luminescence (OSL) dating feasibility studies have concentrated on spit and bar deposits in the Rio Tapajós. Many of these features have an appearance of freshly deposited pristine sand, and these observations and information from anecdotal evidence and LandSat imagery suggest an apparent decadal stability. The characteristics of OSL from small (~5 cm) sub-samples from ~65 cm by ~2 cm diameter vertical cores are quite remarkable. Signals from medium-sized aliquots (5 mm diameter) exhibit very high specific luminescence sensitivity, have excellent dose recovery and recycling, essentially independent of preheat, and show minimal heat transfer even at the highest preheats. These characteristics enable measurement of very small signals with reasonable precision and, using modified single-aliquot regenerative-dose (SAR) approaches, equivalent doses as low as ~4 mGy can be obtained. Significant recuperation is observed for samples from two of the study sites and, in these instances, either the acceptance threshold was increased or growth curves were forced through the origin; recuperation is considered most likely to be a measurement artefact given the very small size of natural signals. Dose rates calculated from combined inductively coupled plasma mass spectrometry/inductively coupled plasma optical emission spectrometry (ICP-MS/ICP-OES) and high-resolution gamma spectrometry range from ~0.3 to 0.5 mGya−1 , and OSL ages for features so far investigated range from 13 to 34 years to several 100 years. Sampled sands are rich in quartz and yields of 212–250 µm or 250–310 µm grains indicate high-resolution sampling at 1–2 cm intervals is possible. Despite the use of medium-sized aliquots to ensure the recovery of very dim natural OSL signals, these results demonstrate the potential of OSL for studying very young active fluvial processes in these settings

‘For recuperation’: elegy, form, and the aleatory in B.S. Johnson's The Unfortunates

B.S. Johnson's The Unfortunates (1969) is British fiction's predominant attempt to embrace aleatorism and to subvert linear causality: the chapters are unbound, and the text invites the reader to shuffle them before reading. Narrative can be understood as a means of containing the ever-present risk of death, of disease, of loss, and has as its impetus a curative trajectory: recuperation is, perhaps, implicit in narrative. The Unfortunates, however, defiantly refuses such comfort. Johnson, this essay asserts, uses his form to cancel the consolations of narrative construction, taking the infectious chains of narrative and repudiating any doctorial/authorial urge to trace the spread of disease/narrative. The anti-linear narrative is inextricable from the type of mourning it enacts, and from the aetiology of the disease that it displays, but declines to track: a type of mourning that refuses movement through time, and the story of a disease that refuses to certify its own development. These refusals, I suggest, are embedded in the grammar and syntax of Johnson's prose. In The Unfortunates the full stops are nodal points of anxiety and loss, an expression of the novel's mortal anxiety. Johnson's final, missing full stop, the novel's aterminal terminus, offers a defiant refusal of recuperation of any kind

Apocalypse and recuperation: Blake and the maw of commerce

The paper is a "materialist" reading of Blake's illuminated works. It examines the copperplate method itself as the main theme of Blake's work, and also as a potentially practical means of conveying Blake's art to its intended audience. The question of audience must be at the center of any avowedly prophetic project. Did Blakean production actually facilitate reception? Are we the audience it sought? What forms of supplementary reproduction are necessary for modern discourse on Blake, and what are the effects of such mediation? To what extent does reproduction undermine. sublate, cancel or recuperate Blakean priorities even as it seeks to represent them? What do we actually read when we read a reproduction? The paper also thinks through the Blakean problem to a broader consideration of artistic projects operating marginally to the predominant cultural economy. and of their relation to criticism

In seinem Anderen bei sich selbst zu sein: Toward a Recuperation of Hegel’s Metaphysics of Agency

This essay argues for a distinctly post-Kantian understanding of Hegel’s definition of freedom as “being at home with oneself in one’s other.” I first briefly isolate the inadequacies of some dominant interpretations of Hegelian freedom and proceed to develop a more adequate theoretical frame by turning to Theodor Adorno. Then I interpret Hegel’s notion of the freedom of the will in the Philosophy of Right in terms of his speculative metaphysics. Finally, I briefly examine Hegel’s treatment of agency in the Phenomenology of Spirit in order to establish important continuities between the early and late Hegel

Cohort Fertility Patterns in the Nordic Countries

Previous analyses of period fertility suggest that the trends of the Nordic countries are sufficiently similar that we may speak of a common "Nordic fertility regime". We investigate whether this assumption can be corroborated by comparing cohort fertility patterns in the Nordic countries. We study cumulated and completed fertility of Nordic birth cohorts based on the childbearing histories of women born in 1935 and later derived from the population registers of Denmark, Finland, Norway, and Sweden. We further explore childbearing behaviour by women’s educational attainment. The results show remarkable similarities in postponement and recuperation between the countries. Median childbearing age is about two to three years higher in the 1960−64 cohort than in the 1950−54 cohort, but the younger cohort recuperates the fertility level of the older cohort at ages 30 and above. A similar pattern of recuperation can be observed for highly educated women compared to women with less education, resulting in small differences in completed fertility across educational groups. Another interesting finding is that of a positive relationship between educational level and the final number of children when women who become mothers at similar ages are compared. Despite some differences in the levels of childlessness, country differences in fertility outcome are generally small. The cohort analyses thus support the notion of a common Nordic fertility regime.cohort fertility, educational attainment, Nordic countries, postponement, recuperation

Kinetic energy motor vehicle recuperation

Práce pojednává o možnostech rekuperace kinetické energie u motorových vozidel. Je zde rozdělení jednotlivých systémů a popsána jejich funkce. V druhé části práce jsou uvedeny příklady aplikace systémů v různých oblastech motorismu.This bachelor thesis deals with possibilities of recuperation of kinetic energy in motor-powered vehicles. It also includes types of recuperation systems and basic description of their function. Aplication and examples of recuperation systems are introduced in second part.

Human Capital and Fertility in Germany after 1990: Evidence from a Multi-Spell Model

We analyze the timing of birth of the first three children based on German panel data (GSOEP) within a hazard rate framework. A random effects estimator is used to accommodate correlation across spells. We consider the role of human capital – approximated by a Mincer-type regression – and its gender-specific effects on postponement of parenthood and possible recuperation at higherorder births. An advantage of the use of panel data in this context consists in its prospective nature, so that determinants of fertility can be measured when at risk rather than ex-post, thus helping to reduce the risk of reverse causality. The analysis finds evidence for strong recuperation effects, i.e., women with greater human capital endowments follow, on average, a different birth history trajectory, but with negligible curtailment of completed fertility.fertility, human capital, event history analysis

Characterization, performance, and prediction of a lead-acid battery under simulated electric vehicle driving requirements

A state-of-the-art 6-V battery module in current use by the electric vehicle industry was tested at the NASA Lewis Research Center to determine its performance characteristics under the SAE J227a driving schedules B, C, and D. The primary objective of the tests was to determine the effects of periods of recuperation and long and short periods of electrical regeneration in improving the performance of the battery module and hence extendng the vehicle range. A secondary objective was to formulate a computer program that would predict the performance of this battery module for the above driving schedules. The results show excellent correlation between the laboratory tests and predicted results. The predicted performance compared with laboratory tests was within +2.4 to -3.7 percent for the D schedule, +0.5 to -7.1 percent for the C schedule, and better than -11.4 percent for the B schedule