A theoretical study of the steady state of a space plasma

An examination of Vlasov theory of a plasma led to the hypothesis that a plasma may reside in a state of minimal change of the uniform distribution. This statement was made definite by determining that the change in the whole distribution can be minimized if the damping rate were maximized. A preliminary test of the theory shows that one would expect a plasma well fit by a kappa distribution to have a low kappa value

The kappa distribution as a variational solution for an infinite plasma

Pangia postulated that the preferred state of a single component infinite plasma is the one that will change the least when perturbed. The plasma distribution of such a state would maximize the plasma wave damping rate, or minimizing gamma where negative gamma is the damping rate. The present study continues from the idea developed by Pangia to determine what distribution function maximizes the damping rate

Ricerca delle problematiche inerenti il sistema informativo per la gestione degli ordini dell'azienda CIS e proposte di miglioramento.

il lavoro tratta dell'analisi del funzionamento del sistema informativo presso l'azienda di spedizioni internazionali CIS Livorno con lo scopo di individuare eventuali problemi sia di natura procedurale che informativa e la proposta di miglioramento con l'obiettivo di migliorare le performances aziendali tramite un uso maggiore e migliore della risorsa informativa

Multiparametric Continuous and Mixed-Integer Nonlinear Optimization with Parameters in General Locations

Convex programming has been a research topic for a long time, both theoretically and algorithmically. Frequently, these programs lack complete data or contain rapidly shifting data. In response, we consider solving parametric programs, which allow for fast evaluation of the optimal solutions once the data is known. It has been established that, when the objective and constraint functions are convex in both variables and parameters, the optimal solutions can be estimated via linear interpolation. Many applications of parametric optimization violate the necessary convexity assumption. However, the linear interpolation is still useful; as such, we extend this interpolation to more general parametric programs in which the objective and constraint functions are biconvex. The resulting algorithm can be applied to scalarized multiobjective problems, which are inherently parametric, or be used in a gradient dual ascent method. We also provide two termination conditions and perform a numerical study on synthetic parametric biconvex optimization problems to compare their effectiveness

Investigation of Oxygen Rebound Utilizing a Novel Mononuclear Nonheme Complex: Kinetic and Structural Investigations

Many heme and nonheme enzymes contain iron ligated in their respective active sites, which is key to the facilitation of vital biological transformations. Both enzymes are known to enact common pathways in the incorporation of dioxygen into various substrates. Common intermediates such as iron-oxo and iron-hydroxo species have been investigated using model complexes, as to allow the study of bond-forming and bond-breaking reactivity which occurs at the metal centers. This dissertation contains reactivity studies on a novel iron(III)-methoxo complex to better understand the mechanism of oxygen radical rebound in nonheme iron enzymes. An overview of key high-valent iron intermediates and complexes is featured in Chapter 1, as well as the introduction to the rebound mechanism. In Chapter 2, the synthesis of the novel iron(III)-methoxo complex is discussed. The material culminated from the synthesis of a new organic ligand with structural modification to encourage mononuclearity. The ferric material forms from its ferrous precursor when open to atmospheric oxygen, and provides a platform from which an analog of rebound could be directly investigated. Chapter 3 discusses the measure of reactivity of the iron(III)-methoxo complex with a stable carbon-based radical. The organic product was identified and quantified, while the one-electron reduced iron material was also observed and quantified. This observation of rebound in the iron(III)-methoxo system provided valuable information regarding oxygen rebound in a mononuclear nonheme iron complex. Chapter 4 utilizes the iron(III)-methoxo material in reaction with several additional organic radicals, to investigate whether the observed rebound reactivity occurs in a concerted or stepwise fashion. Hammett and Marcus analysis was employed, indicating that the transformation was concerted, as would be expected of a rebound reaction. Chapter 5 gives the synthesis of several other iron complexes, with the potential for further investigation of rebound reactivity with regards to chlorine and fluorine. Preliminary reactivity indicates some success, providing a possible avenue toward the study of halogen rebound

Traduzione e neologismi: la lingua muta e l'interprete liberato

Lo scopo di questo lavoro di ricerca bibliografica consiste nell’evidenziare i meccanismi che si attivano quando un traduttore o un interprete devono coniare un neologismo ai fini di una traduzione. Dopo alcune considerazioni di natura filosofica e deontologica sulle figure degli interpreti e dei traduttori, la nostra analisi si è concentrata sulle norme da rispettare a livello linguistico e morfologico per garantire una neoformazione fruibile per la comunità linguistica di arrivo. Successivamente è stato condotto uno studio transdisciplinare per esaminare i quattro ambiti in cui possono comparire i neologismi: scientifico-tecnologico, socio-culturale, socio-politico, artistico-letterario. Questa ricerca ha evidenziato le diverse ragioni di esistere dei neologismi in ciascuno di questi ambiti alla luce di considerazioni a livello culturale, sociale, scientifico, tecnologico, estetico; il nostro studio è stato condotto mediante ricerca bibliografica, analisi di Ngrammi e corpora. In conclusione sottolineiamo che l’interprete e il traduttore modificano la lingua di arrivo e si fanno artefici di nuove parole per mantenere la fedeltà della lingua di partenza. Paradossalmente, un’assoluta mancanza di risorse lessicali apre la pista ad innumerevoli possibilità

La collaborazione tra PMI e distretti industriali tra Italia e Paesi del Nord Africa

CAP. 1: L'ATTIVITA' DEL DIPARTIMENTO PER L'INTERNAZIONALIZZAZIONE E GLI STRUMENTI PROMOZIONALI. IL MINISTERO PER LE ATTIVITA' PRODUTTIVE E IL DIPARTIMENTO PER L'INTERNAZIONALIZZAZIONE. COMPOSIZIONE DEL DIPARTIMENTO PER L'INTERNAZIONALIZZAZIONE. ATTIVITA' PROMOZIONALE GESTIONE DEGLI STRUMENTI AGEVOLATIVI. A. Incentivi ad Enti, Istituti, Associazioni, Consorzi e Camere di Commercio Italiane all'estero o estere in Italia. B.Strumenti di sostegno specificamente volti a favorire l'internazionalizzazione delle imprese. C.Incentivi alla costituzione di societa' all'estero. D.Strumenti nazionali e comunitari di sostegno alla cooperazione internazionale. ACCORDI DI PROGRAMMA E ACCORDI DI SETTORE CAP. 2: I PAESI DEL NORD AFRICA :SITUAZIONE GENERALE E RAPPORTI CON L'ITALIA. IL PARTENARIATO EURO-MEDITERRANEO IL PROGRAMMA MEDA SITUAZIONE GENERALE DEI PAESI NORD AFRICANI ALGERIA EGITTO LIBIA MAROCCO TUNISIA I RAPPORTI COMMERCIALI TRA L'ITALIA ED I PAESI DEL NORD AFRICA. ACCORDI E MISSIONI BILATERALI TRA ITALIA E PAESI NORD AFRICANI COLLABORAZIONE ITALO-TUNISINA PARTENARIATO ECONOMICO ATTUAZIONE PIANO D'AZIONE MISSIONI E VISITE DI STATO ALTRI EVENTI DI COOPERAZIONE COLLABORAZIONE ITALO-MAROCCHINA PARTENARIATO ECONOMICO MISSIONI E VISITE ISTITUZIONALI COLLABORAZIONE ITALO-ALGERINA MISSIONI ED INCONTRI BILATERALI COLLABORAZIONE ITALO-LIBICA MISSIONI E VISITE ISTITUZIONALI COLLABORAZIONE ITALO-EGIZIANA PARTENARIATO ECONOMICO MISSIONI E VISITE DI STATO PRESENZA ITALIANA NEI PAESI DEL NORD AFRICA. TUNISIA MAROCCO LIBIA EGITTO ALGERIA CAPITOLO 3: KEY STUDY. LA REGIONE MARCHE ED IL PROGETTO PAESE TUNISIA. I FASE: STUDIO REALIZZATO DALL'UNIVERSITA' DI ANCONA. II FASE: IL WORKSHOP RISULTATI DELL'INDAGIN

Analysis of disperse dyes and FD&C blue no. 1 as tracers for pesticides

Contamination of water sources due to the use of agricultural chemicals can be minimized through understanding the transport relationships for organic chemicals in soil environments. In this study we evaluated seven non-hazardous dyes that have properties which were consistent with application as surrogates to organic agro-chemicals to assess mobility through soils with respect to adsorption and desorption mechanisms. This study presents the batch adsorption method to obtain soil/water partition coefficients (Kd) for both adsorption and desorption experiments and octanol/water partition coefficients (K-0W). Six hydrophobic disperse dyes were examined and one hydrophilic Food, Dye & Colorant Blue No. 1. Parameter testing of pH stability and adsorption ratios eliminated five dyes; Disperse Violet No. 1 and FD&C Blue No. I remained to be examined in detail. Two soil minerals were employed to demonstrate sorption properties of the dyes; a. soil sample from the B horizon of a Woodburn silt loam and a 30/40 grade clean silica sand. Significant hysteresis was observed between adsorption and desorption processes for the two dyes in the Woodburn soil, suggesting that these dyes do not have fully reversible desorption characteristics when organic matter and the Cation Exchange Capacity (CEC) play a role in organic chemical mobility. Our soil/water batch experiments show that FD&C Blue Dye No. 1 is suitable for use as a tracer for hydrophilic agro-chemicals that have potential to leach through the soil. Disperse Violet No. 1 was found to be an acceptable tracer for laboratory studies to examine the mobility of hydrophobic agro-chemicals that are similarly adsorbed. Experimental K0W values corresponded directly to the prediction of dye partitioning; 7.0 X 10-03 for FD&C Blue No. 1 suggested no partitioning into organic matter, where 6.3 X 10+05 for Disperse Violet No.l suggested strong partitioning into organic matter

Distretti industriali, sviluppo locale e competitivita'

Indice: Distretti industriali, sviluppo locale e competitivita'. Cos'e' un distretto? La competitivita' del distretto Un modello di strategia competitiva: la rete del valore Il distretto industriale come modello di sviluppo locale Le mappe dei distretti I distretti industriali e la legislazione Politiche per i distretti industriali e sviluppo locale Schede territoriali Cenni sulla struttura del comparto tessile - abbigliamento italiano e campano: problemi e prospettive Il territorio I distrett

Obstacle-induced perturbations on turbulent quantities measured in airflows over the sea

An experimental campaign, aiming to investigate the perturbation effects induced by fixed obstacles on turbulence measurements in airflows at the air-sea interface, was carried out at the marine platform of the Italian Navy, located in the harbour of La Spezia (North Ligurian Sea, Italy), near Lerici, on 28th, 29th, and 30th June 1994. This study was prompted by the ever-growing interest in more reliable estimates of energy, mass, and momentum exchanges between water surfaces and atmosphere, whose measurements are severely limited by the geometrical constraints of floating or fixed platforms where they are installed. Two types of meteorological instruments have been used: fast response (20 and 21 Hz) ultrasonic anemometers and fluxmeters to measure turbulent momentum, sensible, and latent heat fluxes and slow-response sensors (less than 4 Hz and sampled at a rate of 1022 Hz) to measure average wind and temperature vertical profiles in the perturbed boundary layer. Both fast- and slow-response instruments have been located a few meters apart from each other, along horizontal and vertical directions, so as to establish also an upper limit to the reliability of horizontal and vertical divergences and gradients of average and turbulent quantities in the obstacle wake. It has been observed that, in the airflow perturbed by the marine platform and its fixed structures, the fast-response instruments of the same type and made by the same manufacturers gave results that compared well with each other, even if they were located at different positions and heights (except for the vertical component of turbulent wind speed), while the comparison among different types of fast instruments gave more uncertain results. On the contrary, as far as mean values of the physical quantities were concerned, the measurements of slow-response instruments in the perturbed airflow were always in good agreement with the averaged data of fast instruments, irrespective of their factory or construction features