227 research outputs found
Combining weak and strong lensing in cluster potential reconstruction
No full textWe propose a method for recovering the two-dimensional
gravitational potential of galaxy clusters which combines data from
weak and strong gravitational lensing. A first estimate of the
potential from weak lensing is improved at the approximate locations
of critical curves. The method can be fully linearised and does not
rely on the existence and identification of multiple images. We use
simulations to show that it recovers the surface-mass density
profiles and distributions very accurately,even if critical curves
are only partially known and if their location is realistically
uncertain. We further describe how arcs at different redshifts can
be combined, and how deviations from weak lensing can be included
Using Supercapacitors in Combination with Bi-directional DC/DC Converters for Active Load Management in Residential Fuel Cell Applications
No full textDeep endometriosis with pericolic lymph node involvement: a case report and literature review
No full textDeep infiltrating endometriosis is an often-painful disorder affecting women during their reproductive years that usually involves the structures of the pelvis and frequently the gastrointestinal tract. We present the case of a 37-year-old female patient with an endometrial growth on the sigmoid colon wall causing pain, diarrhea and the presence of blood in the feces. The histology of the removed specimen also revealed the involvement of the utero-vesical fold, the recto-vaginal septum and a pericolic lymph node, which are all quite uncommon findings. To identify the endometrial cells, we performed immunohistochemical staining for CD10 and the estrogen and progesterone receptor
A Critical Evaluation and Design of Bi-directional DC/DC Converters for Super-Capacitors Interfacing in Fuel Cell Applications
No full textAmong innovative conversion systems for alternative energy, Fuel Cells (PCs) are ideal in applications as distributed power generation or automotive. The connection of FCs to domestic or industrial loads requires a DC/AC converter also acting as a energy buffer to match the different dynamics of FCs and loads. In the last years, a new type of electrolytic capacitors called Super-Capacitors (SCs), has been designed using double layers technology. Such components are able to store more energy than electrolytic capacitors maintaining the capability to swap it at high power levels. Firstly, different solution used to connect SCs to a FC based conversion system are considered. Then, a comparison of bidirectional DC/DC converters designed to manage SCs energy is performed. Finally, the converter design and a laboratory prototype of the adopted solution are reported
MR imaging of the scrotum
No full textMagnetic resonance imaging represents a valuable problem-solving tool in the investigation of scrotal diseases. The technique has a clinical role in cases of inconclusive ultrasonographic examinations and when tissue characterization is necessary. The evaluation of large masses is improved compared to ultrasonography. A variety of nonsurgical lesions are safely characterized. MR imaging can be used to provide information about testicular perfusion with a sensitivity rivaling that of contrast-enhanced ultrasonography
Impatto dei predatori lungo un gradiente forestale di urbanizzazione in Danimarca
No full textLungo un gradiente di urbanizzazione che va dalla foresta, dominata da Fagus selvatica,
ai frammenti della foresta originale nel parco urbano di Sorø a sud della Danimarca
(Isola Zelanda), i coleotteri carabidi non dimostrano un decremento nella loro
diversità generale, ma le specie che hanno una preferenza nei confronti della foresta
diminuiscono (Magura & al. 2010, Global Ecol. Biogegoraphy).
Cercando una spiegazione per quest’anomalia, si sono analizzati i tassi di predazione e
competizione nei differenti habitat a diversi livelli di urbanizzazione. A tal fine è stato
utilizzato un metodo innovativo (Howe & al. 2009, Entomol. Exp. Appl.), che
consiste nella disposizione di larve artificiali di lepidotteri di plastilina verde che
vengono esposte per 24 ore nei differenti habitat. Molti predatori non riconoscono
che si tratta di una preda artificiale, e lasciano dei morsi sulla plastilina. Per quanto
riguarda l’analisi della competizione interspecifica è stato predisposto del cibo su delle
piastre, dove l’occupazione del cibo indica la presenza dei competitori.
Il tasso di predazione nei primi due mesi di primavera era variabile, ma generalmente
alta (15-50%) in tutte i tre tipi di habitat. Sono stati identificati coleotteri, formiche,
piccoli mammiferi ed uccelli come predatori piu frequenti. L’intensità di predazione
dei piccoli mammiferi era più alta nella zona suburbana. Essi sono anche predatori dei
carabidi, indicando che la scarsita dei carabidi negli habitat suburbanei può essere
attribuito all’attivita alta di questo gruppo. E’ indicata una stima di competizione
soprattutto di formiche (Formicidae). I risultati sottolineano che l’ecologia dei carabidi
non può esser interpretata senza considereo gli altri gruppi che fanno parte dello
stesso guild (predatori generalisti) ne l’attività dei predatori del gruppo target (carabidi)
può esser ignorato
The Labyrinth Of The Mind: The Psychology Of War Stories In Tim O’Brien’s Going After Cacciato
No full textThis paper explores and analyzes the psychological reasons for storytelling by soldiers and veterans both during and after their deployments in war. It brings in multiple works by author-veterans as well as critical writing about these books with a specific focus on Going After Cacciato by Tim O\u27Brien. Paul Berlin, the novel\u27s protagonist, imagines a fictional quest leaving Vietnam and going all the way to Paris following the desertion of a fellow soldier gone AWOL. He creates this journey to create order, find meaning, generate understanding, and focus on the good rather than the bad. This paper also explores the effects of Post Traumatic Stress Disorder on the storytelling of soldiers in order to connect the disciplines of English Literature and Psychology
Challenging Historical Narratives: Reassessments of the Vietnam War in Tim O’Brien's Works In the Lake of the Woods (2006) and Going After Cacciato (2014)
No full textEsta pesquisa objetiva analisar como o autor estadunidense Tim O’Brien, um veterano da Guerra do Vietnã, abordou as vivências desse doloroso capítulo histórico em suas obras In the Lake of the Woods (2006) e Going After Cacciato (2014). Explorando a proposta de reavaliação dos fatos proporcionada pela ficção pós-moderna, o estudo objetiva lançar luz sobre um dos períodos mais controversos da História dos Estados Unidos. Sob a perspectiva do pós-modernismo, a análise das estratégias narrativas empregadas por O’Brien fundamenta-se em teorias de Hutcheon (1986, 2001, 2004), Jameson (1997, 1998, 2002), White (1973, 1985, 1987), Said (1994), entre outros. A pesquisa busca não somente examinar as narrativas ficcionais de O’Brien, mas também refletir sobre como a Literatura pode ser uma ferramenta essencial na apresentação de múltiplas perspectivas para fatos históricos. A investigação procura estabelecer conexões entre a metaficção historiográfica, termo cunhado por Hutcheon, as representações da Guerra do Vietnã e as contribuições específicas das obras In the Lake of the Woods e Going After Cacciato no processo de reavaliação da História oficial.This study aims at analyzing the ways in which the American author Tim O´Brien, a veteran of the Vietnam War, addresses the experiences of this painful historical moment in his novels In the Lake of the Woods (2006) and Going After Cacciato (2014). By exploring the notion of fiction as a means of reevaluating facts offered by postmodernism, the study seeks to shed light on one of the most controversial periods in the United States history. From a postmodern perspective, the analysis of the narrative techniques employed by O´Brien is based on theories by Hutcheon (1986, 2001, 2004), Jameson (1997, 1998, 2002), White (1973, 1985, 1987), Said (1994), among others. This investigation endeavors endeavors not only to examine these works of fiction written by O´Brien, but also to reflect upon how Literature can be an essential tool for historical reassessment through multiple perspectives. The investigation aims to establish connections between historiographical metafiction, concept coined by Hutcheon, representations of the Vietnam War, and the specific contributions of In the Lake of the Woods and Going After Cacciato in the process of reevaluating official History.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)CAPES: 88887.817838/2023-00CAPES: 88887.669606/2022-0
Evidence of a Gastro-Duodenal Effect on Adipose Tissue and Brain Metabolism, Potentially Mediated by Gut–Liver Inflammation: A Study with Positron Emission Tomography and Oral18 FDG in Mice
No full textInterventions affecting gastrointestinal (GI) physiology suggest that the GI tract plays an important role in modulating the uptake of ingested glucose by body tissues. We aimed at validating the use of positron emission tomography (PET) with oral18 FDG administration in mice, and to examine GI effects on glucose metabolism in adipose tissues, brain, heart, muscle, and liver, and interfering actions of oral lipid co-administration. We performed sequential whole-body PET studies in 3 groups of 10 mice, receiving i.p. glucose and18 FDG or oral glucose and18 FDG ± lipids, to measure tissue glucose uptake (GU) and GI transit, and compute the absorption lumped constant (LCa) as ratio of oral18 FDG-to-glucose incremental blood levels. GI and liver histology and circulating hormones were tested to generate explanatory hypothesis. Median LCa was 1.18, constant over time and not significantly affected by lipid co-ingestion. Compared to the i.p. route, the oral route (GI effect) resulted in lower GU rates in adipose tissues and brain, and a greater steatohepatitis score (+17%, p = 0.03). Lipid co-administration accelerated GI transit, in relation to the suppression in GIP, GLP1, glucagon, PP, and PYY (GI motility regulators), abolishing GI effects on subcutaneous fat GU. Duodenal crypt size, gastric wall18 FDG uptake, and macro-vesicular steatosis were inversely related to adipose tissue GU, and positively associated with liver GU. We conclude that18 FDG-PET is a suitable tool to examine the role of the GI tract on glucose transit, absorption, and bio-distribution. The GI effect consists in the suppression of glucose metabolism selectively in organs responsible for energy intake and storage, and is blunted by lipid ingestion. Modulation of gut and liver inflammation, as reflected by high GU, may be involved in the acute signalling of the energy status
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