47,474 research outputs found
Investigating the use of a hybrid plasmonic–photonic nanoresonator for optical trapping using finite-difference time-domain method
No full textWe investigate the use of a hybrid nanoresonator comprising a photonic crystal (PhC) cavity coupled to a plasmonic bowtie nanoantenna (BNA) for the optical trapping of nanoparticles in water. Using finite difference time-domain simulations, we show that this structure can confine light to an extremely small volume of ~30,000 nm3 (~30 zl) in the BNA gap whilst maintaining a high quality factor (5400–7700). The optical intensity inside the BNA gap is enhanced by a factor larger than 40 compared to when the BNA is not present above the PhC cavity. Such a device has potential applications in optical manipulation, creating high precision optical traps with an intensity gradient over a distance much smaller than the diffraction limit, potentially allowing objects to be confined to much smaller volumes and making it ideal for optical trapping of Rayleigh particles (particles much smaller than the wavelength of light)
Hybrid photonic-plasmonic platform for high-throughput single-molecule studies
No full textWe present the design and numerical characterization of a hybrid photonic-plasmonic nanoresonator comprised of a 2D photonic crystal (PhC) cavity, a gold bowtie nanoantenna (BNA) and a silicon dioxide, SiO2, spacer. This device is designed to serve as the building block of a multicomponent platform capable of running multiple single-molecule experiments such as optical trapping and sample interrogation simultaneously. The thickness and structure of the spacer layer are adjusted to maximize the energy in the externally accessible hot-spot in the BNA gap. Suitability of the device for photonic integration is demonstrated by exciting it through a PhC waveguide
G. M. Hopkins
No full text[sound recording] / Brendan O'Grady. G. B. Shaw by Fran Frazer.; 1 sound cassette (60 minutes); Broadcast on CFCY Radio, Charlottetown, March 07 & 11, 1974.; G. B. ShawSource type: Electronic(1
Erratum to: Effect of moderate red wine intake on cardiac prognosis after recent acute myocardial infarction of subjects with Type 2 diabetes mellitus (Diabetic Medicine, (2006), 23, 9, (974-981), 10.1111/j.1464-5491.2006.01886.x)
No full textIn an article by Marfella et al, the author name C. Saron is incorrect and should be listed as C. Sardu. Therefore the correct author list is: R. Marfella, F. Cacciapuoti, M. Siniscalchi, F. C. Sasso, F. Marchese, F. Cinone, E. Musacchio, M. A. Marfella, L. Ruggiero, G. Chiorazzo, D. Liberti, G. Chiorazzo, G. F. Nicoletti, C. Sardu, F. D'Andrea, C. Ammendola, M. Verza and L. Coppola.In an article by Marfella et al, the author name C. Saron is incorrect and should be listed as C. Sardu. Therefore the correct author list is: R. Marfella, F. Cacciapuoti, M. Siniscalchi, F. C. Sasso, F. Marchese, F. Cinone, E. Musacchio, M. A. Marfella, L. Ruggiero, G. Chiorazzo, D. Liberti, G. Chiorazzo, G. F. Nicoletti, C. Sardu, F. D'Andrea, C. Ammendola, M. Verza and L. Coppola
Designing software to maximize learning1
No full textThis paper starts from the assumption that any evaluation of educational software should focus on whether or not, and the extent to which, it maximizes learning. It is particularly concerned with the impact of software on the quality of learning. The paper reviews key texts in the literature on learning, including some which relate directly to software development, and suggests ways in which a range of learning theories can inform the process of software design. The paper sets out to make a contribution to both the design and the evaluation of educational software
The M&G Drive
No full textabstract: The M&G Drive is a proposed venture project lead by Barrett seniors, Elijah Smith and Jenna Fitzgerald. This project aims to educate Arizona State University (ASU) students on the issues of food insecurity around the Phoenix valley and facilitate their involvement in helping alleviate this pressing social matter. Scientific research has shown significant inverse relationships between food insecurity and the following: mental and physical health, social skills, and academic achievement. As the largest public university in the nation, Arizona State holds a self-ascribed responsibility for the health of its communities. In order to address this issue on behalf of Arizona State and from the standpoint of college students, this proposed venture will encourage the ASU student population to reallocate their unused M&G Dollars (ASU’s on-campus currency) to go toward this cause. Rather than being absorbed back by the university system, unused M&G Dollars can instead be used to purchase non-perishables that will then be donated to the local Phoenix community in order to help fight against food insecurity
Lah–Ribarič type inequalities for (h, g; m)-convex functions
No full textRecently introduced new class of (h, g; m)-convex functions unifies a certain range of convexity, thus allowing the generalizations of know results. In this paper we prove Lah–Ribarič type inequalities for (h, g; m)-convex functions from which we obtain inequalities of Hermite–Hadamard, Fejér, Giaccardi, Popoviciu and Petrović. © 2021, The Author(s) under exclusive licence to The Royal Academy of Sciences, Madrid
Representative Bureaucracy and the Willingness to Coproduce: An Experimental Study
No full textRelying on the theory of representative bureaucracy—specifically, the notion of symbolic representation—this article examines whether varying the number of female public officials overseeing a local recycling program influences citizens’ (especially women's) willingness to cooperate with the government by recycling, thus coproducing important policy outcomes. Using a survey experiment in which the first names of public officials are manipulated, the authors find a clear pattern of increasing willingness on the part of women to coproduce when female names are more represented in the agency responsible for recycling, particularly with respect to the more difficult task of composting food waste. Overall, men in the experiment were less willing to coproduce across all measures and less responsive to the gender balance of names. These findings have important implications for the theory of representative bureaucracy and for efforts to promote the coproduction of public services.This is the peer reviewed version of the following article: Riccucci, Norma M., Van Ryzin, Gregg G. & Li, Huafang. (2015). Representative Bureaucracy and the Willingness to Coproduce: An Experimental Study. Public Administration Review, which has been published in final form at http://dx.doi.org/10.1111/puar.12401. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.Peer reviewe
Ground-based geological mapping integrated by UAs in the Chiavenna area (Central Alps): examples of application in the frame of the CARG project
No full textGround-based geological mapping integrated by UAs in the Chiavenna area (Central Alps):
examples of application in the frame of the CARG project
Tartarotti P.*1, Apuani T.', Arrigoni F.', Conforto A.', Pigazzi E.', Tantardini D.' & Toffolon G.?
1 Dipartimento di Scienze della Terra
"A. Desio", Università di Milano. 2 Contractor CARG-Valchiavenna Project.
Corresponding author e-mail: [email protected]
Traditional ground-based mapping of cry stalline basements is essential to unravel their tectono-metamorphic
evolution. However, the structural setting of metamorphic terranes is most of the time complicated by the
polyphase history, not least by neotectonics. Many scientific difficulties can be overcome by implementing
the field work with analytical investigations, such as chemical or geochronological analyses, that may solve
several geological issues as long as the structural and microstructural features are well constrained. Recently, an
interest has been growing in advanced technologies dedicated to data acquisition and applications in geological
mapping. Nowadays, unmanned aerial systems (UASs) such as drones are more and more utilised, especially
in mineral exploration and mine exploitation (.g., Honarmand & Shahriari, 2021). Drone photogrammetry
is particularly useful in inaccessible areas, opening a new perspective for all kinds of ground operators. We
used DJI Mavic 2 Pro and DJI Mavic Mini drones to implement the traditional field work on crystalline
basements in the Chiavenna area (Central Alps), within the frame of the project '
"Carta Geologica d'Italia
at scale 1:50.000 - CARG', covering ca. 700 kmq. This area is characterized by altitudes ranging between
200 and 3300 m a.s.l., and by a hostile topography with steep slopes and few road access that make many
outcrops scarcely or not reachable. Most of the territory sees the exposure of polymetamorphic basements of
the Penninic Suretta, Tambò, and Adula Nappes, separated by sheets of Mesozoic metasedimentary rocks, the
Chiavenna unit, interpreted as a remnant of the Valais Ocean, and the Gruf Complex, whose attribution is still
uncertain, intruded in the southeastern portion by the Bergell pluton (Schmid et al., 1996). UAS tools turn to
be fundamental in such kind of terrains, whose applications regard the recognition of different lithologies on
exposed surfaces, structures, morphologies, and landslides. Reiteration of field and intermediate laboratory
work, with UAS-assisted surveys is necessary to finalise the geological mapping and its interpretation.
Honarmand M. & Shahriari H. (2021) - Geological Mapping Using Drone-Based Photogrammetry: An Application for
Exploration of Vein-Type Cu Mineralization. Minerals, 11(6), 585.
Schmid S. M., Pfiffner O. A., Froitzheim N., Schönborn G. & Kissling E. (1996) - Geophysical-geological transect and
tectonic evolution of the Swiss-Italian Alps. Tectonics, 15(5), 1036-1064
RESTLESS BANDIT MARGINAL PRODUCTIVITY INDICES II: MULTIPROJECT CASE AND SCHEDULING A MULTICLASS MAKE-TO-ORDER/-STOCK M/G/1 QUEUE
No full textThis paper develops a framework based on convex optimization and economic ideas to formulate and solve approximately a rich class of dynamic and stochastic resource allocation problems, fitting in a generic discrete-state multi-project restless bandit problem (RBP). It draws on the single-project framework in the author´s companion paper “Restless bandit marginal productivity indices I: Single-project case and optimal control of a make-to-stock M/G/1 queue”, based on characterization of a project´s marginal productivity index (MPI). Our framework significantly expands the scope of Whittle (1988)´s seminal approach to the RBP. Contributions include: (i) Formulation of a generic multi-project RBP, and algorithmic solution via single-project MPIs of a relaxed problem, giving a lower bound on optimal cost performance; (ii) a heuristic MPI-based hedging point and index policy; (iii) application of the MPI policy and bound to the problem of dynamic scheduling for a multiclass combined MTO/MTS M/G/1 queue with convex backorder and stock holding cost rates, under the LRA criterion; and (iv) results of a computational study on the MPI bound and policy, showing the latter´s near-optimality across the cases investigated.
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