Search results for "Rod"
showing 10 items of 22124 documents
Mīļais Misiņa kungs!
1914
Vēstulē P. Šmits stāsta par "Etnografisku rakstu krājuma" 2. daļas rakstiem, kā arī lūdz bibliofilu J. Misiņu pameklēt A. Hupeļa rakstu, atsūtīt kalendāru 1914. gadam. Tie varētu būt gan P. Strautzeļa, gan Zvārguļa vai J. Gūžas sastādītie kalendāri. Vēl lūgums pēc "Dienas Lapas" etnogrāfiskajiem pielikumiem.
NH4HCO3–water solutions regeneration in RED closed loop applications
2017
Reverse Electrodialysis (RED) in closed loop arrangement (Reverse Electrodialysis Heat Engine - REDHE) is a promising technology to convert low-grade waste heat into electricity. RED is a membrane process exploiting the salinity gradient between a concentrated and a diluted solution to generate electrical current. Due to the transfer phenomena occurring in the RED unit, the two exiting solutions are partially mixed. Thermal regeneration processes can be used to restore the initial conditions of the two solutions, thus closing the loop. In this regard, ammonium hydrogen carbonate (NH4HCO3) salt solutions are suitable for such applications, being able to decompose at temperatures above 40-45 …
Assessment of environmental pollution caused by EDCs from everyday objects
2016
Związki modulujące pracę hormonów estrogenowych są grupą związków chemicznych, które przez ostatnich kilka dekad zwróciły uwagę zarówno społeczeństwa, jak i naukowców. Dowiedziono, że substancje te ingerują w prawidłową pracę układu hormonalnego i zaburzają rozwój, reprodukcję, homeostazę i metabolizm żywych organizmów. Zagrażają nie tylko ludziom, ale także wszystkim żywym organizmom. Są obecne w: plastikach, między innymi plastikowych opakowaniach na żywność, detergentach, pestycydach, tworzywach ognioodpornych, metalach ciężkich, a także farmaceutykach i produktach codziennej higieny, takich jak kosmetyki - kremy czy mydła, filtry UV, doustne środki antykoncepcyjne i przeciwbólowe, a tak…
REVERSE ELECTRODIALYSIS FOR POWER PRODUCTION FROM OILFIELD WASTEWATERS
2022
Produced waters (PWs) are wastewaters generated by crude-oil extraction processes. They can present very different characteristics depending on the field location and production process. Dispersed oil, dissolved organics and solid particles are usually the main components. Moreover, PWs can contain a very high quantity of dissolved salts 1, with a total dissolved solid (TDS) concentration up to 300 g/L. Each barrel of extracted oil requires the simultaneous extraction of 3 barrels of produced water2 on average. PWs are often discharged into the sea, or sent in evaporation ponds thus leading to a dramatic environment impact3. Reinjection in the extraction well is currently the most common an…
I mulini ad acqua: dalla conservazione statica alla pratica sistemica
2013
I mulini di Polizzi: dalla conservazione statica alla pratica sistemica. Il sistema tradizionale di molitura con macine azionate dall'energia idraulica, diffuso in tutto il Mediterraneo, è presente molti Comuni della provincia di Palermo, ed è rimasto in uso fino al secondo dopoguerra. Si tratta di strutture produttive a ruota orizzontale; In genere diversi mulini sorgono in successione lungo lo stesso corso d'acqua, costituendo così un sistema. Sono queste le caratteristiche peculiari della “flomaria molendinorum” nel territorio di Polizzi Generosa: una vera e propria scalinata di impianti idraulici ancora visibili nel paesaggio odierno, concentrazioni testimoniate fin dal XII secolo. All'…
Potametum pectinati Carstensen 1955 (Potametea class) in the limnocren karst spring, first location in Poland
2017
Naturalne zbiorniki wodne są w Europie bardzo cennymi obszarami pod względem florystycznym. Wśród nich ważne dla zachowania różnorodności biologicznej flory w Polsce są źródła. Niniejsza praca przedstawia pierwsze w Polsce stanowisko Potametum pectinati Carstensen 1955 z klasy Potametea w limnokrenowym źródle krasowym. Dotychczas zespól ten nie był notowany w tego typu siedlisku w Europie. W artykule przedstawiono skład florystyczny i wymagania ekologiczne tego zespołu.
Una más de la familia. Au pairs atrapadas entre el capital humano y la economía moral
2018
In contemporary societies we are witnessing an expansion of the messages of human capital. These messages have as their central dimension idea of the self-entrepreneur, which implies a deepening in the logic of activation, while blurring the wage relations. In this scenario, young people with university degrees are becoming a favourite target in the offensive of human capital. The penetration of these human capital messages can be seen in the discourses of young university students who have been forced to leave the country during the crisis. In the present text we approach the discourses of young women who came out as au pairs. The characteristics of this figure place it in a space halfway …
Le categorie per la valutazione della produzione scritta degli studenti
2008
Il contributo presenta una proposta di analisi delle interazioni nei webforum per la costruzione della conoscenza condivisa. La costruzione di una comunicazione valorizzante l’apporto costruttivo di singoli studenti e di un’interazione congruente in rete può essere indagata secondo un aspetto contenutistico e uno di tipo relazionale. In riferimento a questi due aspetti, la produzione scritta di studenti universitari nei forum di discussione è stata analizzata con l’utilizzo di una lista di categorie predefinita (griglia di valutazione). La lista di categorie elaborata prospetta un quadro di possibili comportamenti linguistico-comunicativi messi in atto dagli allievi durante l’attività di in…
Deformation Quantization in White Noise Analysis
2007
We define and present an example of a deformation quantization product on a Hida space of test functions endowed with a Wick product.
Univariate and multivariate properties of wind velocity time series
2009
We analyze the time series of hourly average wind speeds measured at 29 different stations located in Sicily, a region with a complex morphology. The investigation, performed from the univariate as well as the multivariate point of view, evidences that the statistical properties of wind at the single sites have features that are not reproduced by standard models and, thus, require specific modeling. Moreover, the synchronous evolution of wind velocity presents a cluster structure, obtained with different algorithms, that persists in the standard deviation too.