Search results for "PV"
showing 10 items of 704 documents
Plaušu audzēja klīniski morfoloģiskais raksturojums
2017
Plaušu vēzis ir pirmā vieta mirstības ziņā gan vīriešiem, gan sievietēm pasaulē un Latvijā. Liela daļa slimības gadījumu tiek atklāta vēlīnās stadijās, kas pasliktina pacientu prognozi. Katru gadu Latvijā saslimst ap 1000 cilvēku un nomirst tik pat daudz. Mūsdienu klīniskajā onkoloģijā NSŠPV (Nesīkšūnu plaušu vēža) agrīnas stadijas ārstēšanā ir svarīgi izvērtēt pacienta riska faktorus, kuri ietekmē pacienta kopējo dzīvildzi un recidīva risku, un izvēlēties atbilstošo terapiju katram pacientam. NSŠPV agrīno stadiju galvenā ārstēšanas metode ir ķirurģiska rezekcija un atkarīgi no klīniskas un patoloģiskas stadijas tiek nozīmētā adjuvanta terapija. Plakanšūnu karcinomas pacientiem pēc ķirurģis…
Sabiedrības līdzdalība attīstības un vides plānošanas procesos un tās noteicošie faktori
2015
Cik lielu nozīmi mūsdienās cilvēki piešķir sev apkārtesošajai videi? Ar to nedomājot tikai dabu un ainavu, bet arī sociālās, emocionālās un citas saiknes. Nenoliedzami šai attieksme gadu gaitā ir notikušas izmaiņas, ko ietekmējušas dažādās Latvijas valsts politiskās iekārtas un mērķi, kā arī tehnoloģiju attīstība, globalizācija, mobilizācija utt., bet tieši apkārtējās vides nozīme, ko tai piešķir indivīds, ir viens no būtiskākajiem faktoriem sabiedrības līdzdalības procesos. Maģistra darbā pētīta sabiedrības līdzdalība plānošanas procesā, kā arī faktori, kas to ietekmē, trīs Latvijas apdzīvotās vietās – Dagdā, Svētciemā un Tūjā. Kvalitatīvo datu ieguvē kā metode tika izvēlēta intervija, jo …
Crosslinked chitosan/poly(vinyl alcohol)-based polyelectrolytes for proton exchange membranes
2019
[EN] The preparation polyelectrolytes based on crosslinked poly(vinyl alcohol) (PVA) and chitosan (CS) was considered as a feasible alternative to develop highly functionalised, cost-effective and eco-friendly membranes for proton exchange fuel cell technologies. CS/PVA-based membranes were combined with sulfosuccinic acid (SSA) as crosslinking and sulfonating agent, and glycerol (GL) to promote flexibility and favour their manageability. The chemical structure, the thermo-oxidative behaviour, the ethanol uptake, the electric, the proton conductivity, and the performance in direct ethanol fuel cell (DEFC) were assessed. In general, all the CS/PVA-based polyelectrolytes showed a synergetic i…
Mosaic activating mutations in GNA11 and GNAQ are associated with phakomatosis pigmentovascularis and extensive dermal melanocytosis
2016
Common birthmarks can be an indicator of underlying genetic disease but are often overlooked. Mongolian blue spots (dermal melanocytosis) are usually localized and transient, but they can be extensive, permanent, and associated with extracutaneous abnormalities. Co-occurrence with vascular birthmarks defines a subtype of phakomatosis pigmentovascularis, a group of syndromes associated with neurovascular, ophthalmological, overgrowth, and malignant complications. Here, we discover that extensive dermal melanocytosis and phakomatosis pigmentovascularis are associated with activating mutations in GNA11 and GNAQ, genes that encode Gα subunits of heterotrimeric G proteins. The mutations were det…
Sistema automatico di protezione e di sicurezza per sistemi fotovoltaici.
2016
Sistema automatico di protezione e di sicurezza per sistemi fotovoltaici. The aim of the invention is to define a safety device for workers and/or operators in photovoltaic systems (PV) both during interventions of normal use (maintenance) and during emergency condition (fire, etc.).Thus, the permanence of continuous voltage along the stretch-line included between the inverter and the panel is still a problem that has not found solution. The scientific-technical objectives of the invention can be considered in the context of the evolving technology of PV system providing great security of the system itself. The system consists of a device, which prevent irradiation of the solar rays from th…
Forecasting the Cell Temperature of PV Modules with an Adaptive System
2013
The need to reduce energy consumptions and to optimize the processes of energy production has pushed the technology towards the implementation of hybrid systems for combined production of electric and thermal energy. In particular, recent researches look with interest at the installation of hybrid system PV/T. To improve the energy performance of these systems, it is necessary to know the operating temperature of the photovoltaic modules. Furthermore, when photovoltaic (PV) systems replace the traditional building envelope materials and they are fully integrated (building integrated photovoltaic (BIPV)), it is very important to correctly assess their thermal behaviour. The determination of …
Characterization of prehispanic cosmetics found in a burial of the ancient city of Teotihuacan (Mexico)
2012
The present paper reports the chemical data obtained on samples of pigmenting materials contained in 31 miniature vessels found in a burial found in Teopancazco, a multiethnic neighborhood center located in the southeastern sector of the archaeological site of Teotihuacan (Central Mexico) and the analytical protocol established for the complete characterization of these archaeological materials. For this purpose a multi-technique approach based on the combination of several non destructive and micro-destructive instrumental techniques, namely, light microscopy (LM), scanning electron microscopy-X-ray micro-analysis (SEMe EDX), transmission electron microscopy (TEM), voltammetry of micropart…
Race typing and molecular characterization of Xanthomonas campestris pv. campestris strains occurring in Italy
2015
Optical Performance Evaluation of DSSC-integrated Glassblocks for Active Building Façades
2015
The paper outlines the results of a research, carried out at the University of Palermo, aimed at the assessment of the energy performance of a novel glassblock integrated with 3rd generation Dye-Sensitized Solar Cells (DSSC), which, when installed into panels, allows obtaining translucent building envelopes able to provide high thermal and visual comfort levels while producing clean energy. The paper focuses on the optical analyses of four different configurations of DSSC-integrated glassblocks, carried out by using the optical design software Zemax. The values of optical transmittance, the solar factor and the electric power – calculated for each configuration – are discussed.