Abstracting network elements from mask layout to network management: a case study

Using the vertical integration of the Synopsys environment, we analyze a 2 2 integrated optical switch obtaining a layer-0 abstraction used to analyze the impact of the design options on transmission performances of a PM-64QAM 600G channel in multi-hop routing in meshed optical networks. The optical switch is designed targeting the Analog Photonics Process Design Kit. The QoT degradation depending on the design option and on the choice for the transmission technique is assessed, taking into account the number of traversed switches. In addition, different routing techniques for the integrated optical waveguides of the 2x2 switches are investigated in terms of system performances. The reported analysis is an example of comprehensive investigation carried out by abstracting the network elements starting from the component design up to the networking management. This approach is today mandatory to enable the maximum capacity in state-of-the art optical networks. To face this challenging problem, Synopsys proposes a vertically integrated software environment for the design of optical communication systems with photonic integrated circuits: it is the integration of OptSim c -optical communication system, OptSim Circuit -schematic-driven photonic circuit, OptoDesigner c -mask layout, and RSoft component design tools. These tools have proven to be reliable aids to virtually designing and estimating the performance of optical transmission systems and photonic chips

Facile Protocol for Water-Tolerant “Frustrated Lewis Pair”-Catalyzed Hydrogenation

Despite rapid advances in the field of metal-free, “frustrated Lewis pair” (FLP)-catalyzed hydrogenation, the need for strictly anhydrous reaction conditions has hampered wide-scale uptake of this methodology. Herein, we report that, despite the generally perceived moisture sensitivity of FLPs, 1,4-dioxane solutions of B(C6F5)3 actually show appreciable moisture tolerance and can catalyze hydrogenation of a range of weakly basic substrates without the need for rigorously inert conditions. In particular, reactions can be performed directly in commercially available nonanhydrous solvents without subsequent drying or use of internal desiccants

The late Medieval Greek poetry : language, metre and discourse (University of Ghent, 2015)

In this contribution, I offer a summary of my 2015 Ph.D. dissertation from the University of Ghent on the language and metre of Late Medieval Greek poetry as they pertain to information structure

Single hole dynamics in dimerized spin liquids

The dynamics of a single hole in quantum antiferromagnets is influenced by magnetic fluctuations. In the present work we consider two situations. The first one corresponds to a single hole in the two leg t-J spin ladder. In this case the wave function renormalization is relatively small and the quasiparticle residue of the S=1/2 state remains close to unity. However at large t/J there are higher spin (S=3/2,5/2,..) bound states of the hole with the magnetic excitations, and therefore there is a crossover from quasiparticles with S=1/2 to quasiparticles with higher spin. The second situation corresponds to a single hole in two coupled antiferromagnetic planes very close to the point of antiferromagnetic instability. In this case the hole wave function renormalization is very strong and the quasiparticle residue vanishes at the point of instability.Comment: 12 pages, 3 figure

New trends in education: the use of ICT in different ways

In the 21st century and due to the exponential growth of the Internet and Information and Communication Technologies (ICT), people live in a technological age, in all areas and in all contexts, we have daily contact with technology, with access to Information. This dynamic requires a constant update of the services and technological tools that change the method that we study, work, communicate and socialize on an unprecedented scale. These constant changes force everyone, regardless of age, gender or profession, to possess a range of functional and critical thinking skills, such as information literacy, media literacy and technological literacy. The evolution of technologies, forces the promoters of education, to always be aware of the changes that society is introducing outside the classroom. Today, students don't have the same pattern as before, regardless of age, they are very active and are no longer the same introverted child who studied a few years ago in the classroom. According to this, students are eager for different forms of motivation inside and outside the classroom, they need the learning and teaching process to move along with changes in society and ICT. To ensure the success of today's students, it is important to provide them with the technological skills to make the correct use of ICTs, to perform tasks essential to their learning process, such as researching and selecting information, creating content, information sharing, use of collaboration tools or environment simulation tools. The main objective of this chapter is to show how ICT tools that can be used in educational environments to help students, helping them develop key skills in their training process, is also relevant to show how these tools can help teachers achieve these goals in daily activities with their students

Spin-S bilayer Heisenberg models: Mean-field arguments and numerical calculations

Spin-S bilayer Heisenberg models (nearest-neighbor square lattice antiferromagnets in each layer, with antiferromagnetic interlayer couplings) are treated using dimer mean-field theory for general S and high-order expansions about the dimer limit for S=1, 3/2,...,4. We suggest that the transition between the dimer phase at weak intraplane coupling and the Neel phase at strong intraplane coupling is continuous for all S, contrary to a recent suggestion based on Schwinger boson mean-field theory. We also present results for S=1 layers based on expansions about the Ising limit: In every respect the S=1 bilayers appear to behave like S=1/2 bilayers, further supporting our picture for the nature of the order-disorder phase transition.Comment: 6 pages, Revtex 3.0, 8 figures (not embedded in text