708 research outputs found
Spurgeon UO2 PNAS Data Archive
No full textOriginal data pertaining to the manuscript "Nanoscale Oxygen Defect Gradients in UO2+x Surfaces," by Steven R. Spurgeon, Michel Sassi, Colin Ophus, Joanne E. Stubbs, Eugene S. Ilton, and Edgar C. Buck, published in the Proceedings of the National Academy of Sciences. Files include original scanning transmission electron microscope images, electron energy loss spectroscopy data, density functional theory calculations, and multislice image simulations
Buck (Carl Darling). A Dictionary of Selected Synonyms in the Principal Indo-European Languages. A Contribution to the History of Ideas
No full textPolomé E. Buck (Carl Darling). A Dictionary of Selected Synonyms in the Principal Indo-European Languages. A Contribution to the History of Ideas. In: Revue belge de philologie et d'histoire, tome 29, fasc. 4, 1951. pp. 1183-1198
Buck (Carl Darling). A Dictionary of Selected Synonyms in the Principal Indo-European Languages. A Contribution to the History of Ideas
No full textPolomé E. Buck (Carl Darling). A Dictionary of Selected Synonyms in the Principal Indo-European Languages. A Contribution to the History of Ideas. In: Revue belge de philologie et d'histoire, tome 29, fasc. 4, 1951. pp. 1183-1198
Between chronicon and chanson: William of Tyre, the first crusade, and the art of storytelling
No full textThe Chronicon of Archbishop William of Tyre is not only a source of unparalleled significance for historians of the Latin East, it is also one that offers an important window onto historical writing in twelfth-century Christendom. Comprising over 1,000 pages of Latin text in the modern critical edition, its twenty-three books span (roughly) the period of Latin Christian involvement in the Levant and Syria from the genesis of the First Crusade in 1095 through to the mid-1180s. The text reflects an extensive writing process, one that most historians argue began c. 1170 and lasted until the period immediately preceding the author's death c. 1184/86. Unsurprisingly for such a lengthy and important work, the Chronicon and its author have attracted widespread interest. However, except for Peter Edbury and John Rowe's 1988 study, scholars have rarely taken a broad-ranging approach to the Chronicon. Instead, recent work has largely focused on examining specific elements or themes of the text, with a growing interest in William's authorial strategies mirroring the emergence of literary approaches to crusade narratives. The Chronicon's first eight books, which account for over a third of the entire work and include the author's retelling of the First Crusade, have nevertheless either been ignored, largely because they are viewed as derivative and of little value in tracing William's authorial voice or ideological standpoints, or approached only to confirm arguments regarding related texts, especially Albert of Aachen's Historia Ierosolimitana and the so-called ‘Lost Lotharingian Chronicle’.
Some recent work has begun to redress this, but a close, careful and detailed analysis of William's account of the First Crusade remains necessary, especially given Edbury and Rowe's somewhat offhand – or at least not fully explored – concluding remark that ‘only in the story of the First Crusade did [William’s] narrative achieve a genuine homogeneity’. Such a study is vital to achieving a better understanding of the author and his text, for these sections offer the best opportunity to trace William's historical method by pinpointing his use and adaptation of other sources to craft his own version of events. But re-examining William's account of the First Crusade is also valuable because it will help to situate the Chronicon more firmly within the wider flourishing of history creation during the twelfth century and beyond, in both a crusading and non-crusading context
Genome sequence of Lactobacillus amylovorus GRL1112
No full textLactobacillus amylovorus is a common member of the normal gastrointestinal tract (GIT) microbiota in pigs. Here, we report the genome sequence of L. amylovorus GRL1112, a porcine feces isolate displaying strong adherence to the pig intestinal epithelial cells. The strain is of interest, as it is a potential probiotic bacteriu
Digitally Controlled DC-DC Buck Converters with Lossless Current Sensing
No full textabstract: Current sensing ability is one of the most desirable features of contemporary current or voltage mode controlled DC-DC converters. Current sensing can be used for over load protection, multi-stage converter load balancing, current-mode control, multi-phase converter current-sharing, load independent control, power efficiency improvement etc. There are handful existing approaches for current sensing such as external resistor sensing, triode mode current mirroring, observer sensing, Hall-Effect sensors, transformers, DC Resistance (DCR) sensing, Gm-C filter sensing etc. However, each method has one or more issues that prevent them from being successfully applied in DC-DC converter, e.g. low accuracy, discontinuous sensing nature, high sensitivity to switching noise, high cost, requirement of known external power filter components, bulky size, etc. In this dissertation, an offset-independent inductor Built-In Self Test (BIST) architecture is proposed which is able to measure the inductor inductance and DCR. The measured DCR enables the proposed continuous, lossless, average current sensing scheme. A digital Voltage Mode Control (VMC) DC-DC buck converter with the inductor BIST and current sensing architecture is designed, fabricated, and experimentally tested. The average measurement errors for inductance, DCR and current sensing are 2.1%, 3.6%, and 1.5% respectively. For the 3.5mm by 3.5mm die area, inductor BIST and current sensing circuits including related pins only consume 5.2% of the die area. BIST mode draws 40mA current for a maximum time period of 200us upon start-up and the continuous current sensing consumes about 400uA quiescent current. This buck converter utilizes an adaptive compensator. It could update compensator internally so that the overall system has a proper loop response for large range inductance and load current. Next, a digital Average Current Mode Control (ACMC) DC-DC buck converter with the proposed average current sensing circuits is designed and tested. To reduce chip area and power consumption, a 9 bits hybrid Digital Pulse Width Modulator (DPWM) which uses a Mixed-mode DLL (MDLL) is also proposed. The DC-DC converter has a maximum of 12V input, 1-11 V output range, and a maximum of 3W output power. The maximum error of one least significant bit (LSB) delay of the proposed DPWM is less than 1%.Dissertation/ThesisPh.D. Electrical Engineering 201
Economic growth and atmospheric pollution in Spain: discussing the environmental Kuznets curve by hypothesis
No full textThe environmental Kuznets curve (EKC) hypothesis posits an inverted U relationship between environmental pressure and per capita income. Recent research has examined this hypothesis for different pollutants in different countries. Despite certain empirical evidence shows that some environmental pressures have diminished in developed countries, the hypothesis could not be generalized to the global relationship between economy and environment at all. In this article we contribute to this debate analyzing the trends of annual emission flux of six atmospheric pollutants in Spain. The study presents evidence that there is not any correlation between higher income level and smaller emissions, except for SO2 whose evolution might be compatible with the EKC hypothesis. The authors argue that the relationship between income level and diverse types of emissions depends on many factors. Thus it cannot be thought that economic growth, by itself, will solve environmental problems.Environmental Kuznets Curve, atmospheric pollution, Spain.
An RF Energy Harvester with MPPT Operating Across a Wide Range of Available Input Power
No full textIn this paper we present the design and simulation results of an RF energy harvesting circuit that operates across a wide range of available input power, from -27 dBm to 6 dBm. The system comprises an adaptive impedance matching network, a single-stage cross-connected differential rectifier, a start-up charge pump, an adaptive buck-boost converter and a Maximum Power Point Tracking (MPPT) circuit. The MPPT circuit controls the switching frequency of the buck-boost converter and configures the impedance matching network, optimizing the interfaces between the rectifier and antenna and between the rectifier and the storage capacitor, thereby guaranteeing that maximum power is being harvested. The system is designed in a standard 0.18 pm CMOS technology. The peak efficiency is 49.1% at an available input power of -18 dBm and signal frequency of 403.5 MHz.Accepted author manuscriptBio-Electronic
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