Search results for " Low Cost."
showing 8 items of 8 documents
Design and experimental characterization of a low-cost, real-time, wireless AC monitoring system based on ATmega 328P-PU microcontroller
2015
This paper describes the development and experimental characterization of a real-time, low-cost, wireless AC monitoring system based on ATmega 328P-PU microcontroller. The proposed system is composed by a main brain for the acquisition and the processing of the data measured by smart meters. From the experimental tests discussed in this work it is demonstrated that the proposed system can monitor, with adequate accuracy, the working cycles of electrical loads in order to evaluate its energy consumption.
Voltammetric Investigation on Uranyl Sorption by Alginate Based Material. Influence of Hydrolysis and pH Dependence
2015
The removal of U(VI) as uranyl (UO22+) from aqueous solutions was investigated by sorption onto alginate based material. The hydrolysis of uranyl ion was always taken into account in the calculations of free (22UO) ion in aqueous solution, in the experimental pH range considered, as well as the acid-base properties of alginate polymer. The sorption process follows a pseudo-second order kinetic model and the sorption rate decreases when the pH value increases. In addition to the classical Langmuir and Freundlich models, the equilibrium data were fitted by using a modified multi-component equilibrium model, never tested before. Differential Pulse Voltammetry (DPV) and Inductively Coupled Plas…
Regenerating Landscape from Resilient Citizens: Parco Uditore, Three Years of "Low Cost Landscape"
2016
In the always surprising capital of Palermo, a hidden garden of opuntia indica relics has been discovered again after decades of oblivion, due to the work and the unceased promotion made by a huge group of citizens, students, teachers and volunteers. In this 9 hectares area owned by the regional government of Sicily since a long time ago (1963), the remains of a dense opuntia plantation characterizes a green forgotten area, casually survived to the building growth of Palermo. Along three decades (1963‐1993) after being a military underground stowage plant for fuel in WWII, the Fondo Uditore is still a full opuntia place, where the sweet fruits and the green and prickly “leaves” where sold r…
An Analytic Hierachy Process for Ranking Operating Costs of Low Cost and Full Service Airlines
2009
This paper develops an application of the analytic hierarchy process to rank the operating cost components of full service and low cost airlines. It takes into account the financial balance sheets and answers to a questionnaire submitted to the managers of selected airlines. The results suggest that the analytic hierarchy process can be appropriately used to obtain the ranking of the costs taking into account different views: financial, management and operative. Rental, office equipment and other supplies costs show the highest importance in the cost ranking, both for full services and low cost airlines. The robustness of the results is tested by Monte Carlo analysis.
INTERNET BASED DEVELOPMENT OF AN OPEN SOURCE LOW-COST CNC
2006
In this paper we show how to realize a low-cost numerical system, based on an “open source” software called EMC (Enhanced Machine Control). First, we assembled a low cost CNC workstation with a remote control by means of an online computer with a webcam, as an example of the software's potentiality. Moreover, we translated a graphical user interface (AXIS), in co-operation with the international development community, in order to improve its userfriendliness.
Una memoria agricola in un paesaggio low cost
2016
L'esperienza della trasformazione del paesaggio agrario tradizionale in un parco urbano partecipato a basso costo. Nella sorprendente Palermo, una città complessa, dove un paesaggio drammatico combatte giorno dopo giorno contro una città contemporanea di pietra e di cemento, un giardino nascosto di Opuntia viene scoperto ancora una volta dopo decenni di oblio, grazie ak lavoro e alla incessante promozione fatta da un gruppo di cittadini, studenti, professori e volontari.
Alkane dehydrogenation on defective BN quasi-molecular nanoflakes: DFT studies
2020
Lower alkanes are feedstocks readily available but relatively inert. The con- version of low cost alkanes to industrially relevant alkenes is usually carried out on metal-based heterogeneous catalysts. Considering both the cost and the potential harmfulness of the metal involved in the dehydrogenation cat- alysts (typically, platinum or chromium), the study of metal-free processes represents an important challenge for the industrial chemistry in order to address more sustainable protocols and different routes either to activate or transform alkanes. Framed in this context, it was investigated, using a den- sity functional theory approach, the potential dehydrogenation activity of de- fectiv…
Progettare un paesaggio low cost
2012
Nelle maggiori città europee e in diversi casi nel resto del mondo la tutela, la valorizzazione e la cura partecipata del verde pubblico sono pratiche ormai consolidate da decenni; esiste da tempo una consapevolezza matura del ruolo determinante che le aree verdi svolgono nell’ambito di uno sviluppo sostenibile della civiltà. Attraverso l’esperienza del recupero per la fruizione immediata di Fondo Uditore a Palermo, oggi si presenta anche per Palermo l’occasione di allinearsi a quella che, più che una tendenza, è una necessità riconosciuta e imprescindibile per garantire una migliore qualità della vita in ambito urbano. Qui, dove la recente storia urbanistica racconta decenni di colpevole n…