Search results for "Spark"
showing 10 items of 124 documents
3-D Shielding Analyses of the Vertical and Mid-Plane Ports in ITER
1996
A three dimensional (3-D) shielding analysis of the International Thermonuclear Experimental Reactor (ITER) has been performed with the aim of calculating the nuclear heating on the magnet system, correlating it to the existing vertical and horizontal ports. When these openings are left unshielded, more than 50 kW are calculated for the upper half of Toroidal Field Coil system and two of the Poloidal Field Coils. A simple plug, with same thickness as of the vacuum vessel can lower the heating to meet the imposed requirements. 5 refs., 6 figs., 4 tabs.
Development of a low-cost piezo film-based knock sensor
2003
It is well known that spark advance is a key parameter in spark ignition engine management. Increasing fuel cost and emission regulation strictness require a higher engine efficiency, which can be improved by an accurate regulation of the spark advance. Under high load conditions, an optimal spark advance choice leads the engine to run next to the knock limit, so the management and control system needs to be equipped with a knock sensor in order to preserve the engine from damage. The authors developed a low-cost knock sensor whose sensing element is a thin washer of polyvinylidine fluoride (PVDF), a fluoropolymer characterized by a great piezoelectric e ect if polarized. The sensor has be…
Polonica w Dzienniczku św. Siostry Faustyny Kowalskiej
2019
Z duchowych zapisków św. Siostry Faustyny Kowalskiej wyłania się prawda o grzesznej kondycji moralno-duchowej narodu polskiego. Faustyna modlitwą i cierpieniem wstawiała się u Boga o miłosierdzie nad jej Ojczyzną. Chrystus, Król Miłosierdzia zapowiedział, że z Polski ma wyjść iskra, która ma przygotować świat na ostateczne przyjście Zbawiciela.
Optimizing Fuel Consumption and Pollutant Emissions of a Spark Ignition Engine for Eco-driving Applications
2018
VPPC 2018, Vehicle Power and Propulsion Conference, Chicago, ETATS-UNIS, 27-/08/2018 - 30/08/2018; The transportation sector is a major contributor to both air pollution and greenhouse gas emissions. While optimizing fuel consumption reduces CO2 emissions, it can increase fuel-rich operation and cause higher HC and CO emissions. A simplified emissions model is thus introduced in order to account for the impact of air/fuel ratio on both the exhaust concentration of regulated pollutants and the catalyst efficiency. This model is used to solve the eco-driving problem with dynamic programming and a weighted objective function. An emission-centered and a consumption-centered scenario are compare…
On the influence of the supporting frame on the nuclear response of the Helium-Cooled Lithium Lead Test Blanket Module for ITER
2006
Abstract Within the European Fusion Technology Programme, very intense research activities have been promoted on the Helium-Cooled Lithium Lead (HCLL) breeding blanket concept with the specific aim of manufacturing a Test Blanket Module (TBM) to be irradiated in ITER. HCLL-TBM is foreseen to be located in an ITER equatorial port, being housed inside a proper steel-supporting frame. In particular, since that frame has been designed to provide two cavities separated by a dividing plate and HCLL-TBM is foreseen to fill just one of them, its nuclear response could vary accordingly to the filling status of the other one, unless the dividing plate is thick enough to isolate the components housed …
An Information Aggregation and Analytics System for ATLAS Frontier
2019
International audience; ATLAS event processing requires access to centralized database systems where information about calibrations, detector status and data-taking conditions are stored. This processing is done on more than 150 computing sites on a world-wide computing grid which are able to access the database using the Squid-Frontier system. Some processing workflows have been found which overload the Frontier system due to the Conditions data model currently in use, specifically because some of the Conditions data requests have been found to have a low caching efficiency. The underlying cause is that non-identical requests as far as the caching are actually retrieving a much smaller num…
Effects of different levels of nitrogen on production and quality of strawberries from fresh "plug plants"
2012
Nitrogen is an essential element, not only for its influence on the vegetativeproductive activity of the plants but also on fruit quality (color, shelf life, etc.). To achieve high production and quality standards, reducing environment impact, the S.Ag.A Department of Palermo carried out some researches to identify the most suitable fertilization to maximize the productive potential of fresh plug plants of two cultivars of strawberry widespread in the Sicilian area, 'Sabrosa®Candonga' and 'Nora', reducing Nitrogen inputs. The experimental design adopted was a splitplot, in which the main plot was the different doses of nitrogen, 120, 170, 220, 270, 320 kg/ha and the secondary one the cultiv…
Diversity of Saccharomyces cerevisiae strains associated to racemes of Grillo grape variety
2020
ABSTRACT The most important oenological characteristics of high-quality sparkling wines are high content of acidity and low pH. Racemes are late-maturing grapes of Grillo variety characterized by low pH and high content of tartaric and malic acids and, due to their intrinsic characteristics, might represent an interesting technological solution to increase acid quality of base sparkling wine. To this purpose, the use of yeasts able to ferment grape must at very low pH is mandatory for the success of the process. In this work, 261 Saccharomyces cerevisiae isolated from spontaneous vinifications of Grillo grape racemes were subject to intraspecific characterization by interdelta analysis whic…
Use of selected indigenous yeasts from racemes of Grillo grape variety to improve the production of sparkling base wine
2019
The production of sparkling wines in Sicily is increasing considerably. The most important oenological characteristics of high quality sparkling wines are high content of acidity and low pH. In Sicily, white grape varieties such as those of the cultivar Grillo are characterized by very low concentrations of malic and tartaric acids due to hot climate and reduced rainfall typical of the production area. On the other hand, a very large amount of raceme grapes, characterized by low pH and high content of tartaric and malic acids, is largely produced by Grillo varieties. Hence, the winemaking of racemes might represent a technological solution to increase the quality of the acids in the final w…
Les colloïdes solubles du vin de champagne. Relation avec le « remuage »
1978
<p style="text-align: justify;">Dans ce travail on étudie un échantillonnage de vins de champagne, en vue d'établir une relation entre leur composition en colloïdes et la facilité du « remuage ».</p><p style="text-align: justify;">Après champagnisation, les teneurs en colloïdes totaux sont toujours supérieures à celles des vins tranquilles correspondants. Plus la durée de clarification et de remuage est grande plus la teneur en colloïdes est élevée.</p><p style="text-align: justify;">Le fractionnement des colloïdes glucidiques solubles, en quatre fractions, sur Sépharose 6 B montre que celle de plus haut poids moléculaire a l'influence la plus directe sur les d…