28 research outputs found
Insights on the Internet routing scalability issues
In recent years, the size and dynamics of the global
routing table have increased rapidly along with an increase
in the number of edge networks. The relation between edge
network quantity and routing table size/dynamics reveals a
major limitation in the current architecture. In this paper we
introduce the two problematics target as the main cause for the
Internet scalability issue. Subsequently, we describe the different
proposals that address the scalability problem. We group them
in three categories: Separation, Elimination and GeographicPostprint (published version
Big Data-backed video distribution in the telecom cloud
Telecom operators are starting the deployment of Content Delivery Networks (CDN) to better control and manage video contents injected into the network. Cache nodes placed close to end users can manage contents and adapt them to users' devices, while reducing video traffic in the core. By adopting the standardized MPEG-DASH technique, video contents can be delivered over HTTP. Thus, HTTP servers can be used to serve contents, while packagers running as software can prepare live contents. This paves the way for virtualizing the CDN function. In this paper, a CDN manager is proposed to adapt the virtualized CDN function to current and future demand. A Big Data architecture, fulfilling the ETSI NFV guide lines, allows controlling virtualized components while collecting and pre-processing data. Optimization problems minimize CDN costs while ensuring the highest quality. Re-optimization is triggered based on threshold violations; data stream mining sketches transform collected into modeled data and statistical linear regression and machine learning techniques are proposed to produce estimation of future scenarios. Exhaustive simulation over a realistic scenario reveals remarkable costs reduction by dynamically reconfiguring the CDN.Peer ReviewedPostprint (author's final draft
Managing Interdomain Traffic in Latin America: A New Perspective based on LISP
The characteristics of Latin American network
infrastructures have global consequences,
particularly in the area of interdomain traffic
engineering. As an example, Latin America
shows the largest de-aggregation factor of IP
prefixes among all regional Internet registries,
being proportionally the largest contributor to
the growth and dynamics of the global BGP
routing table. In this article we analyze the
peculiarities of LA interdomain routing architecture,
and provide up-to-date data about the
combined effects of the multihoming and TE
practices in the region. We observe that the
Internet Research Task Force initiative on the
separation of the address space into locators
and identifiers can not only alleviate the growth
and dynamics of the global routing table, but
can also offer appealing TE opportunities for
LA. We outline one of the solutions under discussion
at the IRTF, the Locator/Identifier
Separation Protocol, and examine its potential
in terms of interdomain traffic management in
the context of LA. The key advantage of LISP
is its nondisruptive nature, but the existing proposals
for its control plane have some problems
that may hinder its possible deployment. In
light of this, we introduce a promising control
plane for LISP that can solve these issues, and
at the same time has the potential to bridge the
gap between intradomain and interdomain traffic
management.Peer ReviewedPostprint (published version
Advantages of a PCE-based control plane for LISP
The Locator/Identifier Separation Protocol (LISP) is one of the candidate solutions to address the scalability issues in
inter-domain routing. The current proposals for its control plane (e.g., ALT, CONS, NERD) have various shortcomings, including the potential dropping of packets at LISP routers during the resolution of the EID-to-RLOC mapping. In this paper, we introduce a new Control Plane (CP) for LISP supported by an architecture that borrows concepts from both the Path Computation Element (PCE) and Intelligent Route Control (IRC). Our CP is able to tackle three different problems simultaneously: (i) packets sourced from end-hosts are
neither dropped nor queued during the mapping resolution; (ii) the EID-to-RLOC mapping can be obtained and configured
approximately within the DNS resolution time needed to fetch the destination EID address; and (iii) our approach can blend IRC with the PCE capabilities, to perform upstream/
downstream Traffic Engineering (TE) through the dynamic management of the mappings. In particular, our CP supports the utilization of different LISP ingress and egress local routers for the same flow sourced from a domain.Peer ReviewedPostprint (author’s final draft
Enabling SCI-FI: service-oriented context-aware and intelligent future Internet
Internet is becoming a huge heterogeneous and dynamic network that is growing beyond its architectural limits. The scaling up of the number of communicating nodes and services is leading the Internet to an architectural crisis which in turn
makes it difficult to provide services efficiently considering the
requirements and context conditions of users. The Information-Centric Networking (ICN) approach proposes a network where
the main paradigm is not an end-to-end communication between hosts, as in the current Internet. Instead, an increasing demand for efficient distribution of content has motivated the development of architectures that focus on information objects.
ICN supports the proliferation of services and contents allowing seamless access to them. This work proposes a context-aware
service negotiation protocol which will enable to find and compose services whilst meeting requesters’ requirements and,
consequently, maximizing the QoE of users. We also provide the main details of a first implementation of the proposed service-oriented solution (SCI-FI) and discuss the gathered results.Postprint (published version
Cama de pollo en Entre Ríos. Aportes para un mejor uso y manejo
La cama de pollo (CP) es un residuo de la producción avícola de pollos parrilleros. Entre Ríos y en particular el área de influencia de la Estación Experimental del INTA Concepción del Uruguay constituyen el principal núcleo productivo de esta rama de la avicultura a nivel país. Entre Ríos concentró el 48,7% de la faena del año 2015. El objetivo del libro es acercar a profesionales, productores, empresas e instituciones interesadas, la información obtenida relativa a la CP por esta unidad del INTA, a través de una compilación.EEA Concepción del UruguayFil: Almada, Natalia Soledad. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay; ArgentinaFil: Araujo, Santiago Ruben. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay; ArgentinaFil: Arias, Norma Monica. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay; ArgentinaFil: Bernigaud, Irma Isabel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay; ArgentinaFil: Bueno, Dante Javier. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay; ArgentinaFil: De Battista, Juan José. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay; ArgentinaFil: Duarte, Sabrina Lorena. Universidad Nacional del Litoral. Facultad de Ingeniería Química; ArgentinaFil: Duarte, Sabrina Lorena. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Centro Científico Tecnológico Santa Fe; ArgentinaFil: Federico, Francisco Javier. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay; ArgentinaFil: Ferrer, José Luis. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay. Agencia de Extensión Rural Villaguay; ArgentinaFil: Gallinger, Claudia Isabel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay; ArgentinaFil: Gange, Juan Martín. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay; ArgentinaFil: Garcia, Ana Laura. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay; ArgentinaFil: Genta, Guillermo. Actividad privada; ArgentinaFil: Procura, Francisco. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay; ArgentinaFil: Procura, Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); ArgentinaFil: Pulido, Diego Germán. Actividad privada; ArgentinaFil: Re, Alejo Esteban. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay; ArgentinaFil: Rodriguez, Francisco. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay; ArgentinaFil: Rodriguez, Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); ArgentinaFil: Soria, Mario. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay; Argentin
Diplomatura Diseño y Gestión de Emprendimientos de Turismo Rural : estrategias de agregado de valor a la producción agropecuaria
Trabajos Finales de Integración y Transferencia, Cohorte Cerro Colorado (Diplomatura Diseño y Gestión de Emprendimientos de Turismo Rural) -- UNC- Facultad de Ciencias Agropecuarias, 2019En esta compilación se presentan una selección de cinco (5) trabajos realizados por los alumnos de la
Cohorte de la Diplomatura desarrollada en la localidad de Cerro Colorado que involucra a
proyectos en los Departamentos Río Seco, Sobremonte y Tulumba (Noroeste de la provincia de
Córdoba, Argentina).
El primer proyecto “Tulumba y sus sendas” trata de los diferentes circuitos turísticos en la Villa de
Tulumba (Departamento Tulumba); el segundo, denominado “Vivencias camperas” propone
vivenciar un día de campo en el establecimiento El Bordo situado en el Departamento Río Seco. El
tercer proyecto plantea una “Raíz red turística” que comprende las localidades de Caminiaga,
Cerro Colorado, Pozo Nuevo, San Francisco del Chañar y Villa María de Río Seco (Departamentos
Río Seco y Sobremonte). “La huella de Don Ata”, en cuarto lugar, plantea un proyecto educativo
relacionado al senderismo en la Comuna del Cerro Colorado. Finalmente, en “Soy el Mapa”, los
autores proyectan el diseño de un cartel de interpretación ordenado en un solo punto que permita
mostrar al turista los lugares relevantes del Cerro Colorado
Clonal chromosomal mosaicism and loss of chromosome Y in elderly men increase vulnerability for SARS-CoV-2
The pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2, COVID-19) had an estimated overall case fatality ratio of 1.38% (pre-vaccination), being 53% higher in males and increasing exponentially with age. Among 9578 individuals diagnosed with COVID-19 in the SCOURGE study, we found 133 cases (1.42%) with detectable clonal mosaicism for chromosome alterations (mCA) and 226 males (5.08%) with acquired loss of chromosome Y (LOY). Individuals with clonal mosaic events (mCA and/or LOY) showed a 54% increase in the risk of COVID-19 lethality. LOY is associated with transcriptomic biomarkers of immune dysfunction, pro-coagulation activity and cardiovascular risk. Interferon-induced genes involved in the initial immune response to SARS-CoV-2 are also down-regulated in LOY. Thus, mCA and LOY underlie at least part of the sex-biased severity and mortality of COVID-19 in aging patients. Given its potential therapeutic and prognostic relevance, evaluation of clonal mosaicism should be implemented as biomarker of COVID-19 severity in elderly people. Among 9578 individuals diagnosed with COVID-19 in the SCOURGE study, individuals with clonal mosaic events (clonal mosaicism for chromosome alterations and/or loss of chromosome Y) showed an increased risk of COVID-19 lethality
Insights on the Internet routing scalability issues
In recent years, the size and dynamics of the global
routing table have increased rapidly along with an increase
in the number of edge networks. The relation between edge
network quantity and routing table size/dynamics reveals a
major limitation in the current architecture. In this paper we
introduce the two problematics target as the main cause for the
Internet scalability issue. Subsequently, we describe the different
proposals that address the scalability problem. We group them
in three categories: Separation, Elimination and Geographi
Big Data-backed video distribution in the telecom cloud
Telecom operators are starting the deployment of Content Delivery Networks (CDN) to better control and manage video contents injected into the network. Cache nodes placed close to end users can manage contents and adapt them to users' devices, while reducing video traffic in the core. By adopting the standardized MPEG-DASH technique, video contents can be delivered over HTTP. Thus, HTTP servers can be used to serve contents, while packagers running as software can prepare live contents. This paves the way for virtualizing the CDN function. In this paper, a CDN manager is proposed to adapt the virtualized CDN function to current and future demand. A Big Data architecture, fulfilling the ETSI NFV guide lines, allows controlling virtualized components while collecting and pre-processing data. Optimization problems minimize CDN costs while ensuring the highest quality. Re-optimization is triggered based on threshold violations; data stream mining sketches transform collected into modeled data and statistical linear regression and machine learning techniques are proposed to produce estimation of future scenarios. Exhaustive simulation over a realistic scenario reveals remarkable costs reduction by dynamically reconfiguring the CDN.Peer Reviewe