Search results for " Figure"

DC and 1/f noise characterization of cryogenically cooled pseudomorphic HEMT's

2002

Pseudomorphic (AlGaAs/InGaAs/GaAs) HEMT's have exhibited the best noise performance over the entire LF-to-microwave frequency range if compared to MESFET's and conventional GaAs HEMT's, due to either a reduced flicker noise, a lower G/R contribution and a smaller high-field diffusion noise. We have recently investigated the microwave (up to 18 GHz) noise properties of packaged pseudomorphic HEMT's from 290 K down to cryogenic temperature values. The current experimental work is aimed at extending such analysis to the LF noise range and at low temperatures. Cryogenic noise spectra (1 Hz to 100 KHz) and DC characteristics have therefore been recorded and the relevant observations on the devic…

Form, figure and landscape for nature in the city.

2014

The article “Form, Figure and Landscape for Nature in the city” describes, through a sequence of steps, the urban and territorial threshold that give structure to the Piacenza southern area. It analyzes in detail the elements that define three “rooms” at different scales: - at the territorial scale, the farmhouses define a system of elements as focal point overlooking the agricultural surface, interpreted as background; - at the urban scale, the reconfiguration of the morphological tissue of the INA Casa neighborhoods allows to read a district itself as a specific “room” inside Piacenza urban fabric; - at the architectural scale, the gardens of interior courtyards of via Francigena building…

Detecting spatio-temporal mortality clusters of European countries by sex and age.

2018

[EN] Background: Mortality decreased in European Union (EU) countries during the last century. Despite these similar trends, there are still considerable differences in the levels of mortality between Eastern and Western European countries. Sub-group analysis of mortality in Europe for different age and sex groups is common, however to our knowledge a spatio-temporal methodology as in this study has not been applied to detect significant spatial dependence and interaction with time. Thus, the objective of this paper is to quantify the dynamics of mortality in Europe and detect significant clusters of mortality between European countries, applying spatio-temporal methodology. In addition, th…

Il ruolo dei nonni nel processo di cogenitorialità

2012

Up to Date Version of a Computer-Driven Noise Figure Measuring System for the Simultaneous Determination of Noise, Gain and Scattering Parameters of …

1995

The complete characterization of microwave transistors in terms of (four) noise, (four) gain and scattering parameters sets ({N), {G) and [SI, respectively) vs. frequency and bias conditions (and also vs. decreasing temperature, if required) is the first and most important step to design low noise amplifiers (LNAs). The characterization of the device under test (DUT) in terms of [SI is friendly by means of commercial Automatic Network Analyzer; then the { G) set may be determined by computation.

Parkinson's disease and segmental coordination during modified figure of eight walking turning task

2016

Turning while walking is problematic for individuals with Parkinson’s disease (PD). We hypothesized there would be instability and turning difficulty for the PD subjects while performing a complex motor skill task of the modified figure of eight (MFE) walking task. There were 26 subjects (10 males and 16 females) with clinical diagnosis of “idiopathic” PD and undergoing L-dopa treatment participating in this study. The PD subjects performed the clinical balance modified figure of eight (MFE) test. The 3-D positions of the head, trunk and pelvis were recorded and analyzed. The angular displacement and angular velocity of the head, trunk and pelvis were calculated. Counter-clockwise and clock…

24-hour-variation of pineal gland volume, pinealocyte nuclear volume and mitotic activity in male Sprague-Dawley rats

1983

In two experiments carried out on two alternate days, the 24-h-rhythmicity of pineal gland volume, pinealocyte nuclear size in cortex and medulla and mitotic activity were studied in male Sprague-Dawley rats, to assess to what extent morphological parameters reflect the pronounced day/night differences in pineal melatonin formation. Pineal volume exhibited statistically significant changes in the second experiment only, with a distinct trough at 6 p.m. Karyometry revealed highly variable patterns. In the first experiment, pinealocyte nuclear changes lacked parallelism in cortex and medulla. The cortex exhibited a bimodal curve with peaks at noon of the first day and at 6 a.m. of the second …

Obraz Hrista v romane Čingiza Ajtmatova "Plaha"

2011

Aitmatov introduced a biblical motif into his novel – he chose Christ examination by Pilate. The writer extended the meaning of the scene, he altered its essence and “genre,” changing it into philosophical disputation. He also invented the story of Christ sailing with his mother on the Nile and their miraculous rescue by a crocodile. These scenes are presented in such a way that they remind the myth of the birth and death of Christ which allows rating Aitmatov's figure of Christ to the fifth category of literary embodiment of Christ proposed by T. Ziołkowski and called CHRIST AS A MYTH. A figure of Christ in the novel is a symbol of the highest perfection of humanity.

Turn, turn, turn : perceiving global and local, clockwise and counterclockwise rotations

2015

International audience; We developed a series of dynamic geometric Navon figures in order to study global/local rotation processing. These figures consist of a global figure (a triangle or a square) made up of local figures (also triangles or squares). Both global and local figures can rotate in either clockwise or counterclockwise directions independently. We found that there is no right or left visual field perceptual advantage for either the global or local levels of these figures, as in Sergent (1982). We did, however, find a significant processing advantage for clockwise motion compared to counterclockwise motion. We also found a highly significant interaction between the detection of …

Questue e figure vicariali in area euromediterranea

2015

Bambini, poveri, becchini, sagrestani – nell’orizzonte ideologico delle culture tradizionali di area euromediterranea – condividono statuto e funzioni simboliche: sono figure vicariali dei defunti nonché mediatori mitici tra il mondo dei vivi e quello dei morti. Nell’intervallo temporale che si sussegue dall’equinozio autunnale a quello primaverile, tali figure erano – e in alcuni contesti, come quello sardo, sono tutt’oggi – protagoniste di questue, nell’ambito delle quali l’offerta materiale e simbolica dei doni sanciva, rinnovandola, l’unità ideale tra sfera umana ed extraumana. Nel presente lavoro, la documentazione folklorica e l’indagine etnografica tentano di chiarire il significato …