Search results for " sink"
showing 10 items of 62 documents
Experimental characterization of a novel configuration of thermoelectric refrigerator with integrated finned heat pipes
2021
Abstract Thermoelectric refrigerating systems (TER) are environment-friendly technologies. They have several advantages such as low maintenance costs, are less cumbersome and long lifetime. However, these systems have low coefficient of performance and are limited in achieving low temperature levels. This study investigates a new configuration of TE refrigerator employing a novel arrangement of heat sinks with integrated flat and finned heat pipes. A mathematical model is firstly developed to predict transient temperatures and cooling limit time. An experimental characterization is then performed and it includes optimization of energy consumption, cooling time, temperature levels and TE ref…
Study of anthropogenic sinkholes in the Marsala area (western Sicily) through numerical analyses of instability processes in underground quarries
2011
Transport and partitioning of 13C-photoassimilate between peach fruiting shoots
2008
We used a non-intrusive method (13CO2 feeding) and a manipulative approach to see whether fruiting shoots in peach trees are autonomous or may import carbon from neighboring shoots under forced conditions, and whether the degree of autonomy is influenced by the source-sink relationship on the shoot. In three experiments, leaf to fruit ratio (L:F) of selected fruiting shoots was moderately (2005 and 2006) or strongly (extreme enforcing 2006) altered to either encourage or discourage movement of carbon from 13C-labeled sending shoots (SFS) to receiving fruiting shoots (RFS), both located on the same main scaffold of V-shaped peach trees. At stage I and III of fruit growth, fruit and shoot tip…
Bīta paaudzes "Misticisms": Alena Ginsberga poēma „Kauciens”
2015
Alena Ginsberga poēma Kauciens ir viens no nozīmīgākajiem 20. gs. literārajiem darbiem. Pētījumā izvirzītie mērķi – izpētīt misticisma iezīmes poēmā Kauciens un identificēt reliģisko sinkrētismu tajā. Uzdevumos ietilpst misticisma definēšana darba tēmas ietvaros, Ginsberga ieskatu apskatīšana bīta paaudzes kontekstā, kā arī poēmas Kauciens analīze. Rezultātā tiek raksturots mūsdienās sastopams misticisms, kur dzejnieks darbojas kā mistiķis, kas komunicē savu pieredzi. Darbs ir unikāls poēmas Kauciens pētniecībā. Darba pamata metode ir kontentanalīze, ar kuras palīdzību tiek analizēta poēma Kauciens. Pētījuma gaitā apstiprināta darbā izvirzītā tēze – bīta paaudzes spilgtākā dzejnieka Alena G…
Heating and cooling with a heat pump
2009
Carbohydrate Metabolism and Source-Sink Relationships in Peach
2011
A growing plant can be viewed as a collection of carbohydrate sinks competing with each other for the available photosynthate supplied by the exporting leaves. Differences in sink strength often result in changes in the ability of various organs to compete for the available food determining final tree growth. A series of experiments have been conducted in peach to study changes and regulation of carbohydrate metabolism in growing organs and get a better understanding of the link between carbohydrate metabolism, sink strength, carbon partitioning and overall tree growth. Along with sucrose, sorbitol represents the major photosynthetic product and the main form of translocated carbon in peach…
Evaporite karst in Italy: A review
2017
none 16 si Although outcropping rarely in Italy, evaporite (gypsum and anhydrite) karst has been described in detail since the early 20th century. Gypsum caves are now known from almost all Italian regions, but are mainly localised along the northern border of the Apennine chain (Emilia Romagna and Marche), Calabria, and Sicily, where the major outcrops occur. Recently, important caves have also been discovered in the underground gypsum mines in Piedmont. During the late 80s and 90s several multidisciplinary studies were carried out in many gypsum areas, resulting in a comprehensive overview, promoting further research in these special karst regions. More recent and detailed studies focused…
L’impiego di strumenti acustici ad alta risoluzione nella valutazione, monitoraggio e gestione delle praterie di Posidonia oceanica.
2015
High-resolution sonar system (MBS, SSS, Sub Bottom Profiler) was used to map and characterize Posidonia oceanica meadows, dead matte formations and to long-term monitor its progressive lower limit. Hydro-acoustic techniques allows to quickly acquire, at sufficiently low cost, a synoptic coverage of a large area and a high number of data by mean of non-destructive methods. Hence, they are recommended as useful tools for detecting and characterizing submerged aquatic vegetation.
Organic matter and wettability characteristics of wildfire ash from Mediterranean conifer forests
2015
Abstract Thermogravimetric analysis (TGA) and water repellency (wettability) determination of ash samples collected following wildfires at four different Mediterranean conifer forest sites in eastern Spain were conducted to provide insights into variations in key chemical and physical characteristics of ash. TGA allowed the evaluation of organic matter (OM) and inorganic carbonate (IC) characteristics and their role in ash wettability. Thermogravimetric profiles were recorded for 40 ash samples (ten from each site). The persistence of water repellency of all ash samples was assessed by the Water Drop Penetration Time (WDPT) test. OM contents decreased, whilst OM stability indices and IC con…