Results of an A109 simulation validation and handling qualities study

The results for the validation of a mathematical model of the Agusta A109 helicopter, and subsequent use of the model as the baseline for a handling qualities study of cockpit centerstick requirements, are described. The technical approach included flight test, non-realtime analysis, and realtime piloted simulation. Results of the validation illustrate a time- and frequency-domain approach to the model and simulator issues. The final A109 model correlates well with the actual aircraft with the Stability Augmentation System (SAS) engaged, but is unacceptable without the SAS because of instability and response coupling at low speeds. Results of the centerstick study support the current U.S. Army handling qualities requirements for centerstick characteristics

La fe convertida en objetos: los exvotos de la Argentina, un arte popular poco conocido

En el año 2015, en el Museo de Arte Popular “José Hernández” de Buenos Aires, presenté la exposición Exvotos Argentinos, un Arte Popular. Esa muestra era el resultado de largos años de investigación que se habían materializado en un libro, un extenso registro y una colección. La primera vez que exhibí el tema fue en 1973 y en la Fundación Lowe, con el título Exposición Fotográfica Documental - Exvotos de la Catedral de La Rioja. En aquel momento mostré sólo las fotos que registraban los conservados en dicha catedral. Provocó mucho interés y asombro en el público y el periodismo ya que no había antecedentes de un relevamiento de esta particular y poco conocida manifestación de fe. Significó para la mayoría de los visitantes algo original y de valor cultural. En la exposición de 2015, además de las fotos documentales de piezas existentes en muchos santuarios, catedrales e iglesias del país, expuse los exvotos que fui consiguiendo a lo largo de más de 47 años. A partir de ese momento comenzaron a pedirme que diese conferencias sobre el tema. Al inicio de dichas conferencias pronunciaba, en broma, la misma frase: “todos sabemos que nadie sabe qué son los exvotos”. Hace poco, en un ámbito universitario, el presentador hizo una breve reseña de mi actividad, dio el título de la charla y luego se arrimó y me preguntó por lo bajo: “¿qué son los exvotos?”Fil: Barbieri, Sergio. Profesor de Bellas Artes. Fotógrafo. Durante 26 años fue investigador de la Academia Nacional de Bellas Artes. Es autor y coautor de 15 libros sobre el patrimonio artístico de la Argentina

IXGAMES – Implementing Internet exchange point, exclusively for games

An ever-growing number of games is available on the market and more and more features are incorporated each day. The increase in the player base and game enhancements demand that games work on a network with reliable speed and efficient time response. This article proposes a high speed network infra-structure exclusive for games,. This network, called IXGAMES originated from experiments with shared routing through Internet Exchange Point (IXP). IXGAMES opens new business opportunities for operators/ Providers and game companies that, not only will provide financial return, but will also allow them to offer better quality service to their customersWorkshop de Arquitecturas, Redes y Sistemas Operativos (WARSO)Red de Universidades con Carreras en Informática (RedUNCI

Development and Technology Assessment of the Analytical Performance of an Eight Position Dynamic Olfactometer

The European technical standard \u201cAir Quality\u2014Determination of Odour Concentration by Dynamic Olfactometry\u201d adopts dynamic olfactometry, a sensorial methodology based on the employment of a panel of human assessors, as the official methodology for the measurement of odour concentration in gas samples. The olfactometer is the device, useful to dilute the odor sample with neutral air, according to precise ratios and to present it to the panel for the analysis. The present paper describes the development of an Italian olfactometer, able to host eight assessors, designed to improve the instrumental performance of the devices actually present on the market, and to increase the accuracy and repeatability of the olfactometric measurement. In particular, in the paper the principal features of the instrumental device and the results of calibrations of dilution valves will be shown

Diurnal and semidiurnal cyclicity of Radon (222Rn) in groundwater, Giardino Spring, Central Apennines, Italy

Understanding natural variations of Rn (222Rn) concentrations is the fundamental prerequisite of using this radioactive gas as a tracer, or even precursor, of natural processes, including earthquakes. In this work, Rn concentrations in groundwater were continuously measured over a seven-month period, during 2017, in the Giardino Spring, Italy, together with groundwater levels in a nearby well installed into a fractured regional aquifer. Data were processed to reduce noise, and then analyzed to produce the Fourier spectra of Rn concentrations and groundwater levels. These spectra were compared with the spectrum of tidal forces. Results showed that diurnal and semidiurnal cycles of Rn concentrations, and filtered oscillations of groundwater levels, in the nearby well, are correlated with solar and luni-solar components of tidal forces, and suggested no correlation with the principal lunar components. Therefore, influencing factors linked to solar cycles, such as daily oscillations of temperature and atmospheric pressure, and related rock deformations, may have played a role in Rn concentrations and groundwater levels. An open question remains regarding the correlation, which is documented elsewhere, of Rn concentrations and groundwater levels with the lunar components of the solid Earth tides

Gene Expression Analysis of an EGFR Indirectly Related Pathway Identified PTEN and MMP9 as Reliable Diagnostic Markers for Human Glial Tumor Specimens

In this study the mRNA levels of five EGFR indirectly related genes, EGFR, HB-EGF, ADAM17, PTEN, and MMP9, have been assessed by Real-time PCR in a panel of 37 glioblastoma multiforme specimens and in 5 normal brain samples; as a result, in glioblastoma, ADAM17 and PTEN expression was significantly lower than in normal brain samples, and, in particular, a statistically significant inverse correlation was found between PTEN and MMP9 mRNA levels. To verify if this correlation was conserved in gliomas, PTEN and MMP9 expression was further investigated in an additional panel of 16 anaplastic astrocytoma specimens and, in parallel, in different human normal and astrocytic tumor cell lines. In anaplastic astrocytomas PTEN expression was significantly higher than in glioblastoma multiforme, but no significant correlation was found between PTEN and MMP9 expression. PTEN and MMP9 mRNA levels were also employed to identify subgroups of specimens within the different glioma malignancy grades and to define a gene expression-based diagnostic classification scheme. In conclusion, this gene expression survey highlighted that the combined measurement of PTEN and MMP9 transcripts might represent a novel reliable tool for the differential diagnosis of high-grade gliomas, and it also suggested a functional link involving these genes in glial tumors

assessment and comparison of multi annual size profiles of particulate matter monitored at an urban industrial site by an optical particle counter by a chemometric approach

n/

Imigração, Refúgio e Terrorismo na Mídia: Associações, Responsabilizações e Medidas Restritivas

Nas últimas décadas, as migrações, refúgio e terrorismo ganharam destaque no cenário internacional. Esses termos muitas vezes são entrelaçados e erroneamente atribuídos. Nesse sentido, o objetivo do artigo é analisar através de categorias pré-estabelecidas as possíveis associações negativas, bem como a atribuições de culpa que podem ter sido derivadas em relação aos imigrantes. Para isso, foi utilizado como método de pesquisa a análise de conteúdo de notícias eletrônicas presentes nas versões online de jornais britânicos e norte-americanos no período de 2015 e 2016, além de fontes bibliográficas. O artigo indica a presença de associações negativas em relação aos imigrantes, a atribuição de culpa a imigrantes e governantes e uma possível influência desses aspectos nas medidas restritivas à imigração adotada na Europa e nos Estados Unidos nesse período

Scintigraphy and Doppler ultrasonography for the evaluation of obstructive urinary calculi

Forty-seven patients with unilateral obstructive calculi (12 males and 35 females) were submitted to 99mTc-diethylene triamine pentaacetic acid (DTPA) or 99mTc-dimercaptosuccinic acid (DMSA) scans for assessment of renal function. The scans revealed unilateral functional deficit in 68 and 66% of the patients, respectively. A calculus size of 1.1 to 2.0 cm was significantly associated with deficit detected by DTPA, but duration of obstruction and calculus localization were not. After relief of the obstruction, the mean percent renal function of the affected kidney was found to be significantly increased from 25 ± 12% to 29 ± 12% in DTPA and from 21 ± 15% to 24 ± 12% in DMSA. Initial Doppler ultrasonography performed in 35 patients detected an increased resistive index in 10 (29%). In the remaining patients with a normal resistive index, ureteral urinary jet was observed, indicating partial obstruction. The high frequency of renal function impairment detected by DTPA and of tubulointerstitial damage detected by DMSA as well as the slight amelioration of unilateral renal function after relief of obstruction suggest that scintigraphy assessment may help evaluate the unilateral percentage of renal function and monitor renal function recovery when it occurs. The presence of a urinary jet detected by Doppler ultrasonography further indicates the severity of obstruction and the recovery prognosis.Universidade Federal de São Paulo (UNIFESP) Escola Paulista de Medicina Divisão de NefrologiaUniversidade Federal de São Paulo (UNIFESP) Escola Paulista de Medicina Divisão de Medicina NuclearUniversidade Federal de São Paulo (UNIFESP) Escola Paulista de Medicina Divisão de UltrassonografiaUniversidade Federal de São Paulo (UNIFESP) Escola Paulista de Medicina Divisão de UrologiaUNIFESP, EPM, Divisão de NefrologiaUNIFESP, EPM, Divisão de Medicina NuclearUNIFESP, EPM, Divisão de UltrassonografiaUNIFESP, EPM, Divisão de UrologiaSciEL