National Institute for Research
National Institute for Research
News Article | December 26, 2016
iEx.ec is inventing the internet of the future by developing its first Blockchain-based, fully distributed cloud computing platform. iEx.ec has released the very first version of its whitepaper showcasing the future of Internet. The document offers a detailed description of iEx.ec’s vision, the market, development roadmap and the upcoming crowd sale of its tokens scheduled for January 17, 2017. iEx.ec which stands for “I Execute” is a French/Chinese company headquartered in Lyon, France with an office provided by Tsinghua University X-elerator. The platform was first introduced at the Ethereum Devcon2 conference held in Shanghai, China in September 2016. The team also successfully showcased a demo of the platform at the Super Computing Exhibition 2016 held in Salt Lake City, USA. With the platform, iEx.ec aims to provide blockchain based distributed applications a scalable, secure and easy access to the computing resources required for their execution. It uses the blockchain to organize a market network where everyone can monetize their servers, applications, and data-sets. This technology extends the Ethereum smart contracts allowing the creation of virtual Cloud infrastructure that provides High-Performance Computing (HPC) services on-demand. iEx.ec leverages a set of research technologies that have been developed at the INRIA and CNRS research institutes in the field of Distributed and Parallel computing. iEx.ec relies on XtremWeb-HEP, a mature, solid, and open-source software which implements all the needed features viz. fault-tolerance, multi-applications, multi-users, hybrid public/private infrastructure, deployment of virtual images, data management, security and accountability, and more. The new Proof-of-Contribution protocol being developed by iEx.ec allows off-chain consensus. With the Proof-of-Contribution protocol, external resource providers can have their resource usage certified directly on the Blockchain. iEx.ec aims to deploy a scalable, high-performance, secure and manageable infrastructure sidechain that will promote a new form of distributed governance, implying key HPC, Big Data, and Cloud industry leaders. The team believes in a future of decentralized infrastructure and market network, where Big Data, HPC, IoT, and AI applications, highly valued datasets, and computing resources (storage, CPU, GPU etc.) will be monetized on the Blockchain with the highest level of transparency, resiliency, and security. iEx.ec will be the key platform powering this future. iEx.ec is a follow-up to the CloudPower project, which was supported by the French National Research Agency (French), the University of Lyon, the French National Institute for Research in Computer Science (INRIA), the University of Paris XI, and the French National Center for Scientific Research (CNRS). Learn more about iEx.ec at – http://iex.ec iEx.ec on YouTube – https://youtu.be/kUM0qR2cmZY iEX.ec is the source of this content. Virtual currency is not legal tender, is not backed by the government, and accounts and value balances are not subject to consumer protections. This press release is for informational purposes only. The information does not constitute investment advice or an offer to invest.
Xu Y.,University of Arkansas at Little Rock |
Karmakar A.,University of Arkansas at Little Rock |
Heberlein W.E.,University of Arkansas for Medical Sciences |
Mustafa T.,University of Arkansas at Little Rock |
And 2 more authors.
Advanced Healthcare Materials | Year: 2012
Few-layer, carbon-coated, iron (C/Fe) magnetic nanoparticles (MNPs) were synthesized with controlled sizes ranging from 7 to 9 nm. The additional loading of two anti-cancer drugs, doxorubicin and erlotinib, was achieved through - stacking onto the carbon shells. Controlled release of the drugs was successfully triggered by radio frequency (RF)heating or pH variation. Based on the experimental results, C/Fe MNPs act as heat-inducing agents and are able to thermally destroy cancer cells when RF is applied. It was found that the combination of anti-cancer drugs (in particular a low dose of doxorubicin) and RF treatment demonstrates a synergistic effect in inducing cell death in pancreatic cancercells. Our findings demonstrate that MNPs can be used as highly efficient multimodal nanocarrier agents for an integrated approach to cancer treatment involving triggered delivery of antineoplastic drugs and RF-induced thermal therapy. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Coros M.,National Institute for Research |
Biris A.R.,National Institute for Research |
Pogacean F.,National Institute for Research |
Tudoran L.B.,Babes - Bolyai University |
And 4 more authors.
Electrochimica Acta | Year: 2013
A crystalline composite nanostructure based on graphene and gold nanoparticles (denoted as Gr-Au) was synthesized in a single-step process by Radio Frequency catalytic Chemical Vapour Deposition (RF-cCVD) over an Au x/MgO catalytic system (where x = 3 wt.% and represents the amount of metal loaded in the catalyst). After preparation, the composite was chemically oxidized with a mixture of sulfuric/nitric acid (3:1 vol.), being subsequently denoted as Gr-AuOH. No massive exfoliation of graphene layers occurred during oxidation, so the degree of crystallinity was preserved, as proved by X-ray powder diffraction (XRD) measurements. For both samples, the crystalline domain had a mean value of approximately 2.25 nm, corresponding to about 6 graphitic layers. The electro-catalytic properties of Gr-Au and Gr-AuOH composites were tested by modifying two gold electrodes with the same amount of each material (denoted Au/Gr-Au and Au/Gr-AuOH, respectively) and subsequently employed for the electrochemical analysis of guanine. A significant decrease in the electrochemical oxidation potential of guanine (∼100 mV) was obtained in both cases. Tafel analysis proved that the modified electrodes have a large value for the exchange current density (approximately 10-7 A) which is one order of magnitude larger than that corresponding to a bare gold electrode. Consequently, these composite materials greatly enhance the transfer of electrons from solution to electrode. However, the major drawback of the Gr-AuOH nanostructure is the large capacitive current induced by the oxygen functional groups and observed in all cyclic voltammetric measurements, which considerably diminishes the sensitivity of the modified electrode. © 2013 Elsevier Ltd. All rights reserved.
Rada S.,Technical University of Cluj Napoca |
Chelcea R.,Technical University of Cluj Napoca |
Rada M.,National Institute for Research |
Bot A.,National Institute for Research |
And 3 more authors.
Electrochimica Acta | Year: 2013
A series of tungsten-lead-germanate glasses with the xWO3A(100 - x)[7GeO2A3PbO] composition wherex = 0, 1, 5, 10, 15, 20, 30, 40 mol% WO3 were synthesized using melt quenching technique. Tungsten ionsseem to exist in these glasses in the W+5 state acting as glass modifiers; this is evidenced from UV-vis,EPR spectra and cyclic voltametry measurements, too.Our results show that the lead and germanium atoms do not accommodate with the non-bridgingoxygens and the excess of the oxygen ions. The accommodation of the network is possible by the increaseof the amount of [WOn] structural units and the formation of PbWO4 crystalline phase, in agreement withIR and XRD data, respectively.The cyclic voltammogram of the glass electrode with x = 10 mol%WO3 exhibits two pairs of distinctmaxima attributed to the reduction of Ag+1 to Ag0, W+6 to W0 and the oxidation of Pb+2 to Pb+4, W+5 to W+6. The semiconducting properties of these glasses are due to electron transfer between tungsten andlead ions with different valence states. © 2013 Elsevier Ltd. All rights reserved.
Kovacs K.,National Institute for Research |
Tosa V.,National Institute for Research
Journal of Modern Optics | Year: 2010
We present a method to trace quantum trajectories of electrons in a high-order harmonic generation process. The method relies on the saddle-point technique and, unlike previously developed analytical techniques, it enables an arbitrary variation in time of the driving fields. The trajectory phases yield information about phase-matching conditions at the optical cycle level, especially useful in investigating attosecond pulse generation. Specially prepared laser pulses, as well as propagation effects can be included in these phase-matching calculations. The method can handle both one- and two-dimensional electron trajectories produced by corresponding driving fields. We show the potentials of the method by calculating trajectories and phase-matching conditions for a polarization gate configuration proposed recently [Altucci, C.; Esposito, R.; Tosa, V.; Velotta, R. Opt. Lett. 2008, 33, 2943-2945.] to obtain isolated attosecond pulse from multi-cycle laser pulses. © 2010 Taylor & Francis.
Buimaga-Iarinca L.,National Institute for Research |
Morari C.,National Institute for Research
Journal of Physical Chemistry C | Year: 2013
The physical properties of cysteine clusters formed on the Au(110)-(1 × 1) surface are investigated by means of density-functional theory. We take into account the clusters formed from three types of rotational conformers of cysteine; for each structure we investigate the protonated and unprotonated forms. Our investigations are based on three different geometrical models for the surface-adsorbate system, allowing us to describe the formation of new nucleation centers on the surface as well as the properties of long chains of cysteine molecules adsorbed on the Au(110)-(1 × 1) surface. We point out significant differences between the relaxed structures formed by each conformer as well as the specific physicochemical properties leading to formation of new nucleation centers compared with those of already formed large cysteine structures. In particular, we emphasize the role of the NH2 group of cysteine in these processes, by correlating our data with its relative position with respect to the gold surface. © 2013 American Chemical Society.
Franklin H.,University of Le Havre |
Derible S.,University of Le Havre |
Popa C.,National Institute for Research
Journal of the Acoustical Society of America | Year: 2010
A method for estimating the strength of the slow wave in the modes propagating in porous layers is presented. It is based upon expansions on transition terms which are linear combinations of the reflection and transmission coefficients. Suitable forms of these coefficients are needed and it is shown how they can be obtained. Both open pore and sealed pore boundary conditions are investigated. It is shown that the zeroth-order and the first-order terms of the expansions suffice to describe accurately the modes and to estimate the strength of the slow wave. Approximations of the absorption coefficient by the porous layer can be deduced. Angles of incidence above and below the critical angle of the shear wave are considered. Comparisons between theory and experiments for the two types of boundary conditions are presented at normal incidence for the transition terms. © 2010 Acoustical Society of America.
Sima V.,National Institute for Research
15th International Conference on System Theory, Control and Computing, ICSTCC 2011 | Year: 2011
The latest developments of the SLICOT Library and associated tools are discussed, and issues related to its future evolution are summarized. Structure-exploiting solvers for skew-Hamiltonian/Hamiltonian matrix pencils have been added. Possible applications include the computation of L ∞-or H ∞-norms of linear time-invariant multivariable systems, and solution of algebraic matrix Riccati equations. © 2011 Faculty of Auto Control.
Radu V.-M.,National Institute for Research |
Diacu E.,Polytechnic University of Bucharest |
Varduca A.,National Institute for Research
Revista de Chimie | Year: 2013
This paper presents the evolution of suspended solids and nutrients (total nitrogen, ammonium, nitrite, nitrate, total phosphorus, orthophosphate) levels for the Danube River from 2005 to 2009, the results being in conjunction with the annals of the ICPDR. The aim of this study was to follow the spatial and temporal variations of nutrients, achieving inter-parametric correlations and the representative functions necessary for the evaluation of the ecological status of the water. Also, the data related to the hydrological conditions have been integrated with the hydro-chemical monitoring and the interrelated flow with the recorded concentrations, these correlations being needed as technical and scientific background for the water management plans.
Miclaus M.,National Institute for Research |
Miclaus M.,Babes - Bolyai University |
Grosu I.-G.,National Institute for Research |
Filip X.,National Institute for Research |
And 2 more authors.
CrystEngComm | Year: 2014
Structure determination of lisinopril dihydrate is conducted using NMR crystallography methods. The analysis is centred on the optimization of a strategy capable of providing key structural features that are inaccessible by XRPD alone even under high-resolution conditions. This journal is © The Royal Society of Chemistry.