An analytical model for Loc/ID mappings caches

Concerns regarding the scalability of the interdomain routing have encouraged researchers to start elaborating a more robust Internet architecture. While consensus on the exact form of the solution is yet to be found, the need for a semantic decoupling of a node's location and identity is generally accepted as a promising way forward. However, this typically requires the use of caches that store temporal bindings between the two namespaces, to avoid hampering router packet forwarding speeds. In this article, we propose a methodology for an analytical analysis of cache performance that relies on the working-set theory. We first identify the conditions that network traffic must comply with for the theory to be applicable and then develop a model that predicts average cache miss rates relying on easily measurable traffic parameters. We validate the result by emulation, using real packet traces collected at the egress points of a campus and an academic network. To prove its versatility, we extend the model to consider cache polluting user traffic and observe that simple, low intensity attacks drastically reduce performance, whereby manufacturers should either overprovision router memory or implement more complex cache eviction policies.Peer ReviewedPostprint (author's final draft

Metastatic tumors to the stomach: clinical and endoscopic features.

AIM: To evaluate the clinical and endoscopic patterns in a large series of patients with metastatic tumors in the stomach. METHODS: A total of 64 patients with gastric metastases from solid malignant tumors were retrospectively examined between 1990 and 2005. The clinicopathological findings were reviewed along with tumor characteristics such as endoscopic pattern, location, size and origin of the primary sites. RESULTS: Common indications for endoscopy were anemia, bleeding and epigastric pain. Metastases presented as solitary (62.5%) or multiple (37.5%) tumors were mainly located in the middle or upper third of stomach. The main primary metastatic tumors were from breast and lung cancer and malignant melanoma. CONCLUSION: As the prognosis of cancer patients has been improving gradually, gastrointestinal (GI) metastases will be encountered more often. Endoscopic examinations should be conducted carefully in patients with malignancies, and endoscopic biopsies and information on the patient's clinical history are useful for correct diagnosis of gastric metastases

Study on psychoeducation enhancing results of adherence in patients with schizophrenia (SPERA-S): Study protocol for a randomized controlled trial

none51sìopenD.R.Petretto; A.Preti; C.Zuddas; F.Veltro; M.B.L.Rocchi; D.Sisti; V.Martinelli; M.G.Carta; C.Masala; Alfa, R.; Arcidiacono, E.; Aguglia, E.; Bonanni, E.; Borea, M.; Consolazione, M.; De Giglio, P.; Di Rosa, A.; Faravelli, C.; Fioravanti, G.; Nastro, P.F.; Floris, A.; Floris, F.; Iannone, C.; Iuso, S.; La Verde, M.; Laffranchini, L.; Lecca, M.E.; Lo Sauro, C; Rosa Magni, L.; Margari, F.; Marras, M.; Marzano, L.; Masotti, E.; Matta, C.; Minutolo, G.; Moro, M.F.; Mura, G.; Nardini, M.; Nicchiniello, I.; Padalino, F.; Papini, M.N.; Pastore, A.; Petito, A.; Pioli, R.; Porfiri, G.M.; Pullara, A.; Sancassiani, F.; Seu, M.I.; Stallone, V.; Vinci, S.; Zappone, L.D. R., Petretto; A., Preti; C., Zuddas; F., Veltro; Rocchi, MARCO BRUNO LUIGI; Sisti, Davide; V., Martinelli; M. G., Carta; C., Masala; Alfa, R.; Arcidiacono, E.; Aguglia, E.; Bonanni, E.; Borea, M.; Consolazione, M.; De Giglio, P.; Di Rosa, A.; Faravelli, C.; Fioravanti, G.; Nastro, P. F.; Floris, A.; Floris, F.; Iannone, C.; Iuso, S.; La Verde, M.; Laffranchini, L.; Lecca, M. E.; Lo Sauro, C; Rosa Magni, L.; Margari, F.; Marras, M.; Marzano, L.; Masotti, E.; Matta, C.; Minutolo, G.; Moro, M. F.; Mura, G.; Nardini, M.; Nicchiniello, I.; Padalino, F.; Papini, M. N.; Pastore, A.; Petito, A.; Pioli, R.; Porfiri, G. M.; Pullara, A.; Sancassiani, F.; Seu, M. I.; Stallone, V.; Vinci, S.; Zappone, L

Axion search with a quantum-limited ferromagnetic haloscope

A ferromagnetic axion haloscope searches for Dark Matter in the form of axions by exploiting their interaction with electronic spins. It is composed of an axion-to-electromagnetic field transducer coupled to a sensitive rf detector. The former is a photon-magnon hybrid system, and the latter is based on a quantum-limited Josephson parametric amplifier. The hybrid system consists of ten 2.1 mm diameter YIG spheres coupled to a single microwave cavity mode by means of a static magnetic field. Our setup is the most sensitive rf spin-magnetometer ever realized. The minimum detectable field is $5.5\times10^{-19}\,$T with 9 h integration time, corresponding to a limit on the axion-electron coupling constant $g_{aee}\le1.7\times10^{-11}$ at 95% CL. The scientific run of our haloscope resulted in the best limit on DM-axions to electron coupling constant in a frequency span of about 120 MHz, corresponding to the axion mass range $42.4$-$43.1\,\mu$eV. This is also the first apparatus to perform an axion mass scanning by changing the static magnetic field.Comment: 4 pages, 4 figure