Search results for "HVA"
showing 10 items of 78 documents
Eritrealaisten nuorten miesten sosiaaliset verkostot ja niiden merkitys heidän elämäänsä Suomeen saapumisen jälkeen
2017
Tutkimuksessa tarkastelen kiintiöpakolaisina syksyllä 2013 Suomeen saapuneiden eritrealaisten nuorten miesten heikkoja ja vahvoja sosiaalisia suhteita ja verkostoja. Tutkimuksen tarkoituksena on selvittää, millaisia sosiaalisia verkostoja miehillä on ja millaisiksi he verkostonsa kokevat. Tutkimuksessa huomioidaan sosiaalisen tuen näkökulma. Tutkimuksen kohdejoukko koostuu kahdeksasta eritrealaisesta nuoresta miehestä. Tutkimus on luonteeltaan laadullinen ja tutkimusaineisto kerättiin teemahaastattelujen avulla, ennalta määrättyä haastattelurunkoa käyttäen. Analyysimenetelmänä olen käyttänyt teoriasidonnaista sisällönanalyysia. Luokittelun tuloksena kuvaan haastateltavien transnationaalisia…
Microwave response of bulk MgB2 samples of different granularity
2006
The microwave response of three high-density bulk MgB2 samples has been investigated in the linear and nonlinear regimes. The three samples, characterized by different mean size of grains, have been obtained by reactive infiltration of liquid Mg in powdered B preforms. The linear response has been studied by measuring the microwave surface impedance; the nonlinear response by detecting the power radiated by the sample at the second-harmonic frequency of the driving field. Our results suggest that bulk MgB2 prepared by the liquid Mg infiltration technique is particularly promising for manufacturing resonant cavities operating at microwave frequencies.
Superconducting Microwave Cavity Made of Bulk MgB2
2006
We report the successful manufacture and characterization of a microwave resonant cylindrical cavity made of bulk MgB2 superconductor (Tc = 38.5 K), which has been produced by the Reactive Liquid Mg Infiltration technique. The quality factor of the cavity for the TE011 mode, resonating at 9.79 GHz, has been measured as a function of the temperature. At T = 4.2 K, the unloaded quality factor is 2.2x10^5; it remains of the order of 10^5 up to T ~ 30 K. We discuss the potential performance improvements of microwave cavities built from bulk MgB2 materials produced by reactive liquid Mg infiltration.
Testing an adapted beerkan infiltration run for a hydrologically relevant soil hydraulic characterization
2020
Abstract Literature raises doubts about the usability of infiltrometer methods to characterize soils in a hydrological perspective since these methods often yield excessively high infiltration rates or saturated soil hydraulic conductivity, Ks, values. For a loam (AR) and a silty-clay (RO) soil, beerkan infiltration runs were adapted in the perspective to obtain usable soil data to predict rainfall partition into infiltration and rainfall excess. In particular, the initially nearly dry soil was sampled with different water volumes (15 or 30) and heights of water application (low, L, 0.03 m, and high, H, 1.5 m), and the BEST-steady algorithm was applied to determine sorptivity, S, and Ks. Th…
Lower and Upper Probability Bounds for Some Conjunctions of Two Conditional Events
2018
In this paper we consider, in the framework of coherence, four different definitions of conjunction among conditional events. In each of these definitions the conjunction is still a conditional event. We first recall the different definitions of conjunction; then, given a coherent probability assessment (x, y) on a family of two conditional events \(\{A|H,B|K\}\), for each conjunction \((A|H) \wedge (B|K)\) we determine the (best) lower and upper bounds for the extension \(z=P[(A|H) \wedge (B|K)]\). We show that, in general, these lower and upper bounds differ from the classical Frechet-Hoeffding bounds. Moreover, we recall a notion of conjunction studied in recent papers, such that the res…
Analysis of the new submarine interconnection system between Italy and Malta: Simulation of transmission network operation
2016
In this paper, some simulations of the interconnected Sicilian and Maltese transmission systems are performed, in order to assess this new system configuration. The HVAC submarine interconnection between Italy and Malta came into operation in 2015 and is part of a European programme for transmission grid interconnection improvement. This new line has been built in order to allow a better management of the power system of both the islands. Firstly, a brief description of the interconnection system is given. Moreover, the transmission systems of Sicily and Malta are depicted and their structures are shown. The simulations are carried out by means of a model of the interconnected system create…
People comfort and artwork saving in museums: comparing indoor requisites
2009
In museums, environmental indoor conditions should, contemporaneously, preserve the exhibited works of art and ensure the comfort conditions for people. Unfortunately, human and artworks requirements are characterised by different values of the physical indoor parameters that, occasionally, could become conflicting. In the paper, these problems are addressed by means of a literature analysis, with a specific attention to thermal comfort conditions of people. The possibility of finding common ranges of values for both requisites is finally discussed. Some recent technical recommendations on the matter have also been considered for indicating some HVAC equipment and appliances to be adopted i…
Efectos conductuales y neuroquímicos del consumo de éxtasis y cocaína en ratones adolescentes.
2009
La 3,4-metilendioximetanfetamina (MDMA), una sustancia popularmente conocida como éxtasis, es una droga ilícita consumida habitualmente por adolescentes y adultos jóvenes. Además, el policonsumo es una práctica habitual entre los usuarios de la MDMA, siendo la cocaína una de las drogas más frecuentemente asociadas a esta sustancia. El objetivo del presente trabajo fue evaluar los efectos a corto y largo plazo que se producen tras la administración de la MDMA (5, 10, o 20 mg/kg) sola o en combinación con cocaína (25 mg/kg) en ratones adolescentes. En el estudio sobre el efecto agudo, observamos que ambas drogas administradas individual o simultáneamente incrementan la actividad motora. La do…
Thermal comfort condition assessment in test buildings with different heating/cooling systems and wall envelopes
2017
Abstract The main aim of this study is a comprehensive analysis of long-term monitoring data of thermal comfort and discomfort parameters in small identical test buildings equipped with different heating/cooling systems. Calculations of PPD index expressed the human perception of thermal comfort and such discomfort factors like draught rate and vertical air temperature difference are provided for the room in winter season running three different heating systems – electric heater, air-air heat pump and air-water heat pump, as well as for the summer cooling with split type air conditioning systems. It is shown that the type of heating/cooling system and its working regime has a significant im…
Interaction between surface plasmon polaritons and molecules in strong coupling limit
2016
Miniaturization of optical elements and their integration to electronic circuits is limited by diffraction limit. It was realized that light being coupled to surface plasmons (SP) can overcome this limit. Employing also optically active molecules in combination with SPs can drive optical circuits to nm-scale and add functionalities. For efficient performance of plasmonic elements involving fluorescent dye molecules investigation of physics behind their interaction is of high priority. In this thesis interaction between surface plasmon polaritons (SPPs) and different dye molecules has been studied, especially within strong coupling limit, which brings in totally new physical properties in th…