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Software-Defined Networking and Virtualization: The Service Provider Perspective
Attila Takacs,Elisa Bellagamba,Joe Wilke,DK Lee 에스케이텔레콤 (주) 2013 Telecommunications Review Vol.23 No.5
An architecture based on software-defined networking (SDN) and virtualization techniques gives operators greater freedom to balance operational and business parameters, such as network resilience, service performance and QoE against the costs. In this work we review our Carrier Cloud as a future mobile network infrastructure that exploits both SDN and virtualization technologies in order to increase the operator agility, reduce the cost, and even disrupt the vendor landscape. We begin with Ericsson’s approach to SDN goes beyond the data center addressing issues in the service provider environment, and move on to network functions virtualization (NFV) as a promising alternative to the legacy network infrastructure. We also reveal there are remaining hurdles of those key technologies to overcome in order to be fully adopted in the Telco world.
Marcello Picchio,Annalisa Romina Di Filippo,Martina Spaziani,Simone Orelli,Riccardo Bellagamba,Giuliano Guttoriello,Alessandro De Cesare,Erasmo Spaziani 대한갑상선-내분비외과학회 2021 The Koreran journal of Endocrine Surgery Vol.21 No.3
Purpose: The study aims to determine whether postoperative infusion of betamethasone reduces the risk of symptomatic hypocalcaemia (SHC) and other complications after total thyroidectomy. Methods: We compared a group of patients receiving betamethasone (beta group) postoperatively to a group without any perioperative glucocorticoid infusion (no beta group). Plasma levels of parathyroid hormone, total calcium, and C-reactive protein (CRP) were measured pre- and postoperatively. Complications were recorded within a 30-day follow-up. Postoperative SHC was the primary outcome. Results: In the beta group and the no beta group, 54 patients and 47 patients were included, respectively. In the beta group, the incidence of SHC (4 pts vs. 14 pts in the no beta group; P=0.003) was reduced. In the beta group, serum calcium levels were higher on postoperative day 1 (8.6 mg/dL vs. 8.2 mg/dL in the no beta group; P=0.001) and day 2 (8.7 mg/dL vs. 8.1 mg/dL in the no beta group; P<0.000). In the beta group, serum C-reactive protein levels were lower postoperatively. In a univariate analysis, American Society of Anaesthesiology score > I (odds ratio [OR], 0.19; P=0.002), no betamethasone treatment (OR, 0.19; P=0.006), and parathyroid glands remaining in situ (PGRIS) score <3 (OR, 6.00; P=0.005) were related to postoperative SHC; in a multivariate analysis, betamethasone treatment (OR, 0.09; P=0.007) and PGRIS score <3 (OR, 8.41; P=0.045) were related to postoperative SHC. No difference was observed in postoperative complications. Conclusion: Postoperative use of betamethasone reduces the incidence of SHC after thyroid surgery without affecting other complications.
Measurement of the longitudinal proton structure function at HERA
ZEUS Collaboration,Chekanov, S.,Derrick, M.,Magill, S.,Musgrave, B.,Nicholass, D.,Repond, J.,Yoshida, R.,Mattingly, M.C.K.,Antonioli, P.,Bari, G.,Bellagamba, L.,Boscherini, D.,Bruni, A.,Bruni, G.,Cind North-Holland Pub. Co 2009 Physics letters: B Vol.682 No.1
The reduced cross sections for ep deep inelastic scattering have been measured with the ZEUS detector at HERA at three different centre-of-mass energies, 318, 251 and 225 GeV. From the cross sections, measured double differentially in Bjorken x and the virtuality, Q<SUP>2</SUP>, the proton structure functions F<SUB>L</SUB> and F<SUB>2</SUB> have been extracted in the region 5x10<SUP>-4</SUP><x<0.007 and 20<Q<SUP>2</SUP><130 GeV<SUP>2</SUP>.
ZEUS Collaboration,Chekanov, S.,Derrick, M.,Magill, S.,Musgrave, B.,Nicholass, D.,Repond, J.,Yoshida, R.,Mattingly, M.C.K.,Antonioli, P.,Bari, G.,Bellagamba, L.,Boscherini, D.,Bruni, A.,Bruni, G.,Cind North-Holland Pub. Co 2009 Physics letters: B Vol.672 No.2
A search for events with an isolated high-energy lepton and large missing transverse momentum has been performed with the ZEUS detector at HERA using a total integrated luminosity of 504 pb<SUP>-1</SUP>. The results agree well with Standard Model predictions. The cross section for production of single W bosons in electron-proton collisions with unpolarised electrons is measured to be 0.89<SUB>-0.22</SUB><SUP>+0.25</SUP>(stat.)+/-0.10(syst.)pb.
Measurement of J/ψ photoproduction at large momentum transfer at HERA
Chekanov, S.,Derrick, M.,Magill, S.,Musgrave, B.,Nicholass, D.,Repond, J.,Yoshida, R.,Mattingly, M. C. K.,Antonioli, P.,Bari, G.,Bellagamba, L.,Boscherini, D.,Bruni, A.,Bruni, G.,Cindolo, F.,Corradi, Springer-Verlag 2010 Journal of high energy physics Vol.2010 No.5
Measurement of D ± and D 0 production in deep inelastic scattering using a lifetime tag at HERA
Chekanov, S.,Derrick, M.,Magill, S.,Musgrave, B.,Nicholass, D.,Repond, J.,Yoshida, R.,Mattingly, M. C. K.,Antonioli, P.,Bari, G.,Bellagamba, L.,Boscherini, D.,Bruni, A.,Bruni, G.,Cindolo, F.,Corradi, Springer-Verlag 2009 European Physical Journal C Vol.63 No.2
Production of excited charm and charm-strange mesons at HERA
Chekanov, S.,Derrick, M.,Magill, S.,Musgrave, B.,Nicholass, D.,Repond, J.,Yoshida, R.,Mattingly, M. C. K.,Antonioli, P.,Bari, G.,Bellagamba, L.,Boscherini, D.,Bruni, A.,Bruni, G.,Cindolo, F.,Corradi, Springer-Verlag 2009 European Physical Journal C Vol.60 No.1