169,974 research outputs found
Adversarial scheduling analysis of Game-Theoretic Models of Norm Diffusion.
No full textIn (Istrate et al. SODA 2001) we advocated the investigation of robustness of results in the theory of learning in games under adversarial scheduling models. We provide evidence that such an analysis is feasible and can lead to nontrivial results by investigating, in an adversarial scheduling setting, Peyton Young's model of diffusion of norms . In particular, our main result incorporates contagion into Peyton Young's model.evolutionary games, stochastic stability, adversarial scheduling
DCT techniques vs incineration for remediation of soils contaminated by diesel and salts
No full textThe objective of the present research is to determine the optimum parameters for obtaining a high efficiency of the treatment of electrochemical remediation, in order to remediate a soil contamination by organic compounds and salts. The obtained results are planned to be adopted for a comparative analysis with the option of incineration. An electrochemical remediation method using a constant current, instead of constant voltage, was evaluated for its ability of remediating such contamination. The impacts of five factors including initial total petroleum hydrocarbon (TPH) concentration, conductivity, salinity, soil type, moisture was assessed. The major impact comes from conductivity that establish the possibility to apply the electrochemical treatment under constant current. The obtained data are suitable for the development of an energy balance of this approach and are planned to be used for a comparison with an alternative option of remediation: incineration. The main goal of incineration is to heat the contaminated media to temperatures between 870 and 1,200°C, volatilizing and burning the organic compounds. The full comparison will be made in a future paper; in this paper preliminary considerations are presented
On being "dark" and promiscuous: The Dark Triad traits, mate value, disgust, and sociosexuality
No full textThere is considerable evidence suggesting the Dark Triad traits (i.e., psychopathy, narcissism, & Machiavellianism) are associated with greater promiscuity, but the mechanisms liking them are poorly understood. In this study (N = 379) we replicated prior associations between the Dark Triad traits and sociosexuality and considered the potential mechanisms of mate value and (limited) sexual disgust in meditation and moderated-mediation models. The Dark Triad traits were correlated with short-term mating, but only narcissism was associated with more mate value and only psychopathy was associated with limited sexual disgust. Mate value moderated the relationship between psychopathy, sexual disgust, and short-term mating. Sexual disgust acted as a mediator between psychopathy and short-term mating. As such, people high in psychopathy who have high mate value are more promiscuous because they are less disgusted
Management of waste electric and electronic equipments in two EU countires: a comparison
No full textThe paper presents some data regarding waste electrical and electronic (WEEE) management in one of the founding countries of the EU, Italy, and in a recent entry into the EU, Romania. The aim of this research was to analyze some problems that countries entering the EU will have to solve with respect to WEEE management. The experiences of Italy and Romania could provide an interesting reference point. The strengths and weaknesses that the two EU countries have encountered can be
used in order to give a more rational plan for other countries. In Italy the increase of WEEE collection was achieved in parallel with the increase of the efficiency of selective Municipal Solid Waste
collection. In Romania, pilot experiences were useful to increase the awareness of the population. The different interests of the two populations towards recyclable waste led to a different scenario: in
Romania all types of WEEE have been collected since the entrance into the EU; in Italy the "interest" in recycling is typically related to large household appliances, with a secondary role of lighting equipment
Poultry manure gasification and its energy yield
No full textThe disposal of poultry manure is one of the main problems of the poultry sector. The results of some tests developed in a gasification pilot plant are presented in this paper. The aim was to preliminarily analyze the energy generation from poultry manure treated by gasification. The level of energy yields and the quantification of the produced syngas are also reported. The good results suggests an possible application at full scale
2′β-Fluoro-Tricyclo Nucleic Acids (2′F-tc-ANA): Thermal Duplex Stability, Structural Studies, and RNase H Activation
No full textWe describe the synthesis, thermal stability, structural and RNase H activation properties of 2′β-fluoro-tricyclo nucleic acids (2′F-tc-ANA). Three 2′F-tc-ANA nucleosides (T, 5MeC and A) were synthesized starting from a previously described fluorinated tricyclo sugar intermediate. NMR analysis and quantum mechanical calculations indicate that 2′F-tc-ANA nucleosides prefer sugar conformations in the East and South regions of the pseudorotational cycle. UV-melting experiments revealed that non-consecutive insertions of 2′F-tc-ANA units in DNA reduce the affinity to DNA and RNA complements. However, an oligonucleotide with five contiguous 2′F-tc-ANA-T insertions exhibits increased affinity to complementary RNA. Moreover, a fully modified 10-mer 2′F-tc-ANA oligonucleotide paired to both DNA (+1.6 °C/mod) and RNA (+2.5 °C/mod) with significantly higher affinity compared to corresponding unmodified DNA, and similar affinity compared to corresponding tc-DNA. In addition, CD spectroscopy and molecular dynamics simulations indicate that the conformation of the 2′F-tc-ANA/RNA duplex is similar to that of a DNA/RNA duplex. Moreover, in some sequence contexts, 2′F-tc-ANA promotes RNase H-mediated cleavage of a complementary RNA strand. Taken together, 2′F-tc-ANA represents a nucleic acid analogue that offers the advantage of high RNA affinity while maintaining the ability to activate RNase H, and can be considered a prospective candidate for gene silencing applications
Trattamenti biologici e chimici combinati con DCT per terreni inquinati da composti organici
No full textI suoli contaminati da sostanze organiche sono una problematica importante a livello europeo: in alcune aree rappresentano la principale causa d’inquinamento, o la seconda dopo la contaminazione da smaltimento di rifiuti. In questo lavoro si presentano risultati di un’attività sperimentale che confronta tre metodologie di bonifica dei siti contaminati, basate su campi elettrici. Un trattamento singolo (elettro-risanamento), e due trattamenti combinati: fito-elettrochimico e l’elettro-ossidazione (combinazione di un trattamento chimico e uno a DCT). Il suolo trattato è stato prelevato da un’ex area industriale dedicata alla raffinazione del petrolio, compresa tra due strade: una statale e una ad uso industriale. Sono stati prelevati nove campioni di terreno a due differenti profondità: 0,2 e 0,4 m. La caratterizzazione iniziale del terreno ha evidenziato una densità di 1,5 g cm-3 e un’umidità di circa il 20% mentre dal punto di vista della granulometria 50% del suolo aveva particelle con diametro minore di 0,08 mm. Il trattamento elettrochimico e quello di elettrossidazione sono stati sviluppati su un impianto pilota in grado di trattare circa 500 kg di terreno, mentre la prova di fito-elettrorisanamento è stata eseguita in un reattore in grado di trattarne 11 kg di terreno
The work in Romania : an analysis of the macroeconomic perspective
No full textCentral objective of this working paper is to analyze the total available time of the Romanian population, and how time is structured, allocated and used by groups of activities. At the same time there will be taken into account the particularities on the use of time in different stages of life, and also the factors associated with influence and effects on social and economic welfare.labour market, Romania, labour time, social welfare
An Extremely Low-mass He White Dwarf Orbiting the Millisecond Pulsar J1342+2822B in the Globular Cluster M3
No full textWe report on the discovery of the companion star to the millisecond pulsar J1342+2822B in the globular cluster M3. We exploited a combination of near-ultraviolet and optical observations acquired with the Hubble Space Telescope in order to search for the optical counterparts to the known millisecond pulsars in this cluster. At a position in excellent agreement with that of the radio pulsar J1342+2822B (M3B), we have identified a blue and faint object (m F275W ≈ 22.45) that, in the color-magnitude diagram of the cluster, is located in the region of He core white dwarfs (WDs). From the comparison of the observed magnitudes with theoretical cooling tracks we have estimated the physical properties of the companion star: It has a mass of only 0.19 ± 0.02 M o, a surface temperature of (12 ± 1) × 103 K, and a cooling age of Gyr. Its progenitor was likely a ∼0.84 M o star, and the bulk of the mass-transfer activity occurred during the subgiant branch phase. The companion mass, combined with the pulsar mass function, implies that this system is observed almost edge-on and that the neutron star (NS) has a mass of 1.1 ± 0.3 M o, in agreement with the typical values measured for recycled NSs in these compact binary systems. We have also identified a candidate counterpart to the wide and eccentric binary millisecond pulsar J1342+2822D. It is another WD with a He core and a mass of 0.22 ± 0.2 M o, implying that the system is observed at a high inclination angle and hosts a typical NS with a mass of 1.3 ± 0.3 M o. At the moment, the large uncertainty on the radio position of this millisecond pulsar prevents us from robustly concluding that the detected star is its optical counterpart
Punti di forza e di debolezza per la bonifica dei terreni inquinati di contaminanti organici utilizzando un trattamento a base di campo elettrico
No full textL'idea del presente articolo nasce dai limiti riscontrati durante l'esecuzione di una ricerca sperimentale basata sull'applicazione del trattamento elettrochimico di idrocarburi in suolo inquinato. L’articolo è stato focalizzato sulle limitazioni fisiche, chimiche ed economiche di questo metodo di bonifica. E’ stato sviluppato anche un confronto tra gli aspetti problematici individuati quando lo studio di laboratorio è stato spostato in campo. La presente ricerca si è concentrata solo sugli inquinanti organici, in particolare sugli idrocarburi risultati dalla contaminazione da prodotti petroliferi. Il principale obiettivo di questo studio è evidenziare i punti di forza e debolezza di questo tipo di trattamento, sulla base della ricerca svolta e anche sui dati già esistenti in letteratura. Inoltre, alcune soluzioni sono state offerte per migliorare il successo del metodo applicato come opzione per la rimozione di prodotti petroliferi da siti contaminati. Durante la ricerca sono stati monitorati i seguenti parametri: corrente, pH, potenziale redox, temperatura e conducibilità. Per quanto riguarda la contaminazione organica, il comportamento di questi parametri ha avuto un'influenza importante sull'efficienza del trattamento
- …
