Search results for "COPI"
showing 10 items of 2618 documents
Plasmonic nanostructures through DNA-assisted lithography
2018
DALI combines DNA origami with conventional top-down fabrication for creating designer high-resolution plasmonic nanostructures.
Optical quenching and recovery of photoconductivity in single-crystal diamond
2017
We study the photocurrent induced by pulsed-light illumination (pulse duration is several nanoseconds) of single-crystal diamond containing nitrogen impurities. Application of additional continuous-wave light of the same wavelength quenches pulsed photocurrent. Characterization of the optically quenched photocurrent and its recovery is important for the development of diamond based electronics and sensing. (C) 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license. This work was supported by AFOSR and the DARPA QuASAR program, by NSF Grant No. ECCS-1202258, and by DFG through the DIP program (FO 703/2-1).
Formulations and valid inequalities for the capacitated dispersion problem
2023
This work focuses on the capacitated dispersion problem for which we study several mathematical formulations in different spaces using variables associated with nodes, edges, and costs. The relationships among the presented formulations are investigated by comparing the projections of the feasible sets of the LP relaxations onto the subspace of natural variables. These formulations are then strengthened with families of valid inequalities and variable-fixing procedures. The separation problems associated with the valid inequalities that are exponential in number are shown to be polynomially solvable by reducing them to longest path problems in acyclic graphs. The dual bounds obtained from s…
La pittura vascolare attica a fondo bianco: la prospettiva archeologica, l'apporto dell'indagine scientifica
2017
Il presente contributo intende offrire nuovi spunti di ricerca sui vasi attici a fondo bianco e sulla relativa tecnica pittorica. In particolare, è stato selezionato come caso di studio il cratere del Pittore della Phiale (450-440 a.C.) con il mito di Perseo e Andromeda, esposto nel Museo Archeologico di Agrigento. La prima parte del lavoro si concentra sugli aspetti archeologici e storico-artistici, cercando di ricostruire il ruolo di questa tecnica nella produzione figurativa dell’artigiano e il rapporto tra il cratere di Agrigento e gli altri prodotti del Pittore della Phiale. Inoltre, viene considerata la connessione tra tecnica e con- testo di utilizzo e acquirenti o “committenti”, la…
Searches for cosmic neutrino sources with ANTARES, KM3NeT and IceCube and time calibration of ANTARES
2020
La astronomía con neutrinos de alta energía es una disciplina relativamente joven. Nació de la necesidad de extender la astronomía convencional más allá de los mensajeros electromagnéticos habituales para intentar responder la cuestión pendiente del origen de los rayos cósmicos de alta energía. Recientemente, el único telescopio de neutrinos del tamaño de un kilómetro cúbico actualmente en funcionamiento, IceCube, comunicó la primera observación significativa de un flujo difuso de neutrinos de alta energía de origen astrofísico junto con la primera asociación convincente de neutrinos astrofísicos con una fuente cósmica individual, abriendo una nueva era para la astronomía de neutrinos de al…
ChemInform Abstract: Two New Retigerane-Type Sesterterpenoids from the Lichen Leprocaulon microscopicum.
2016
Two new compounds (I) and (II) are isolated, possessing a rare pentacyclic carbon skeleton typical for lichen metabolism, and quite unusual in the vegetal kingdom.
The laparoscopic approach to Acute Mesenteric Ischemia is today unclear and less debated (AMI). There are in fact no clinical evidences on this parti…
2016
The laparoscopic approach to Acute Mesenteric Ischemia is today unclear and less debated (AMI). There are in fact no clinical evidences on this particular focus and only few articles can be found in several databases (pubmed, cochrane library, etc.), and the problem concerns both diagnostic and therapeutic utilization of the procedure. These considerations were already taken into account in 2012 EAES guidelines where the Grade of Recommendation (GoR) of laparoscopy in AMI was low in both diagnostic and therapeutic aspects. According to the new Oxford Classification [1], the use of laparoscopy in patients with suspicious or diagnosed AMI presents a weak GoR.
Sparassidae in China. 1. Revised list of known species with new transfers, new synonymies and type designations (Arachnida: Araneae)
2001
This paper starts a revisional study of Chinese Sparassidae. A total of three subfamilies, eight genera and 53 species is known so far from China. Detailed data on type material of each species with references and known distribution are given. Following species are transferred to other genera: Olios menghaiensis (Wang 1990) COMB. NOV. (from Heteropoda), Olios nanningensis (Hu & Ru 1988) COMB. NOV. (from Micrommata), Olios tiantongensis (Zhang & Kim 1996) COMB. NOV (from Heteropoda), Pseudopoda bibulba (Xu & Yin 2000) COMB. NOV. (from Heteropoda), Pseudopoda marsupia (Wang 1991) COMB. NOV. (from Sinopoda), Sinopoda dayong (Bao, Yin & Yan 2000) COMB. NOV. (from Heteropoda), and Sinopoda himal…
Thermal and hygrometric properties of traditional calcarenite stones in the area of Palermo
2017
Il contributo espone le misure di conducibilità termica svolte su tre conci di calcarenite conchiliare e la caratterizzazione igrometrica di uno di essi. I risultati sono confrontati con i dati termici e igrometrici riportati dalle norme tecniche esistenti (UNI 10351, UNI EN ISO 10456, UNI EN 1745). The energy improvement of historic buildings requires detailed knowledge of the thermal and hygrometric properties of traditional materials and components. These data should be collected for specific local contexts, where the features of historic constructions are comparable. For the purpose of developing this tool for the architectural heritage of Palermo, this research focuses on calcarenite s…