1,916 research outputs found
The Parigi Mechanism:A Novel 1-DOF Mechanism and Its Application as a Kinetic Reciprocal System (KRS) Adaptive Facade
No full textThe Parigi mechanism, invented by the author, is described and defined rigorously with the use of the kinetic reciprocal system (KRS) algorithm. The mechanism possesses one degree of freedom (DOF) and consists of a network of elements reciprocally connected with pin-slot joints. The network can be extended infinitely and retain one DOF, regardless of the number of elements added. The principle of the KRS algorithm is presented, and the inputs required to generate the Parigi mechanism are described. A KRS adaptive facade based on the Parigi mechanism is proposed. Since the mechanism possesses one DOF, a single actuator can actuate it. Therefore, a facade based on this mechanism can be engineered with a reduced mechanical complexity, while allowing the control of building physics performance (daylight illumination, solar gain, ventilation, acoustics), as well as quantifiable (privacy, view) and unquantifiable (composition, aesthetic sense of the movement) architectural parameters
MANUALE DI GEOMETRIA: ESERCIZI E TEMI D'ESAME SVOLTI
No full textTesto divulgativo per studentesse e studenti del primo anno di IngegneriaPopular text for students of the first year of Engineerin
MANUALE DI GEOMETRIA: TEORIA
No full textTesto divulgativo per studentesse e studenti del primo anno di IngegneriaPopular text for students of the first year of Engineerin
Vagina and External Female Genitalia
No full textLABIAL SYNECHIAE - Developing because of estrogens deficiency in presence of recurrent inflammations, usually asymptomatic. No treatment is usually required, since spontaneous opening can be expected; application of an oestrogen cream can quicken this process. HYMENEAL ATRESIA - Usually unknown until puberty, when menstruations start, causes hydrometrocolpos or haematometrocolpos. Diagnosis is clinical (protrusion of the hymen outside the vulva) and US. Treatment is surgical (opening of the hymen). © 2009 Springer-Verlag
Late recurrence of infantile hypertrophic pyloric stenosis
No full textA case of infantile hypertrophic pyloric stenosis that recurred 2 months after Ramstedt's operation is presented. A second pyloromyotomy was carried out with resolution of symptoms. A computer-based review of the literature suggests that this is the first such report. © 1994 Springer-Verlag
Le famiglie italiane e l'introduzione dell'Euro: storia di uno shock annunciato
No full textIl lavoro analizza l’evoluzione dell’atteggiamento delle famiglie italiane nell’ultimo biennio, proponendo alcune interpretazioni delle loro percezioni e di come queste abbiano interagito con alcune variabili macroeconomiche. Dagli inizi del 2002 le famiglie sono apparse sempre più pessimiste, come risulta dalla caduta dell’indice del clima di fiducia (ICF), sceso fino ai livelli minimi della recessione del 1992-93. Mediante l’ausilio di modelli econometrici in cui il clima di fiducia dipende da alcune variabili macroeconomiche di immediata rilevanza per le famiglie, nel lavoro si mostra come l’equazione dell’ICF presenti nel periodo 2002-2004 una costante e consistente sovrastima, segnalando la presenza di un break strutturale. Per capire le motivazioni di questa evoluzione si analizza la relazione tra l’ICF e le percezioni dell’inflazione da parte delle famiglie. L’introduzione nel modello di questa variabile, ne migliora nettamente la performance eliminando ogni traccia di “rottura” nella specificazione. La peculiarità del caso italiano, rispetto a quelli francese e tedesco, rafforza l’ipotesi secondo cui l’evento%
The use of monthly indicators to forecast quarterly GDP in the short run: an application to the G7 countries
No full textThe delayed release of the National Account data for GDP is an impediment to the early understanding of the economic situation. In the short run, this information gap may be at least partially eliminated by bridge models (BM) which exploit the information content of timely updated monthly indicators. In this paper we examine the forecasting ability of BM for GDP growth in the G7 countries and compare their performance to that of univariate and multivariate statistical benchmark models. We run four alternative one-quarter ahead forecasting experiments to assess BM performance in situations as close as possible to the actual forecasting activity. BM are estimated for GDP both for single countries (US, Japan, Germany, France, UK, Italy, and Canada), and area-wide (G7, European Union, and Euro area). BM forecasting ability is always superior to that of benchmark models, provided that at least some monthly indicator data are available over the forecasting horizon
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