Lewi Lozano

Universidad Nacional De Cajamarca, INGENIERIA, Post-Doc

Followers

Following

Public Views

Alejandro Cid

Universidad de Montevideo

Santiago Altieri

Universidad de Montevideo

Manuel Eisner

University of Cambridge

Marcelo Rossal

Universidad de la República

Mauricio Fuentes

Universidad de Buenos Aires

Gabriel Tenenbaum

Universidad de la República (Uruguay)

Nilia Viscardi

Universidad de la República (Uruguay)

Elina Carril

Universidad de la República

Gus Sanchez

Universidad Autonoma de Yucatan

Leslie Ruiz

Centro Nacional de Investigación y Desarrollo Tecnológico

Interests

Uploads

Papers by Lewi Lozano

Caracterizacion de la poblacion adolescente de instituciones educativas de la region oeste de Montevideo en relacion a la situacion de violencia en que viven

Download

Measurement of the e+e- -- gammagamma(gamma) cross section at LEP energies

Community Dentistry and Oral Epidemiology, 1994

The total and the dierential cross sections for the reaction e + e ! () have been measured with t... more The total and the dierential cross sections for the reaction e + e ! () have been measured with the DELPHI detector at LEP using an integrated luminosity of 36.9 pb 1 . The results agree with the QED predictions and consequently there is no evidence for non-standard channels with the same experimental signature. The lower limits obtained on the QED cuto parameters are + > 143 GeV and > 120 GeV, and the lower bound on the mass of an excited electron with an eective coupling constant = 1 is 132 GeV/c 2 . Upper limits on the branching ratios for the decays Z 0 ! , Z 0 ! 0 , Z 0 ! and Z 0 ! have been determined to be 5.5 10 5 , 5.5 10 5 , 8.0 10 5 , and 1.7 10 5 respectively. All the limits are at the 95% condence level.

Download

15th Congress of the International Headache Society 23-26 June 2011, Berlin, Germany

Cephalalgia, 2011

To assess bone regeneration in critical sized defects in the rabbit calvarium, filled with the bo... more To assess bone regeneration in critical sized defects in the rabbit calvarium, filled with the bone substitute calcium phosphate cement. Circular bone defects (8mm) were made in both parietal bones of 10 rabbits. One of the defects was filled with the calcium phosphate cement, and the other received autogenous bone harvested from the calvaria. The animals were killed at 3 or 6 weeks (n=5). Data analysis included qualitative assessment of the calvarial specimens and histomorphometric analysis was used to quantify the amount of new bone within the defects. The microscopic analysis of the samples showed bone healing with both calcium phosphate cement and autogenous bone graft. Data obtained from the histomorphometric analysis were statistically analyzed using 2-way analysis of variance and the Tukey&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;s test. Data analysis showed that the autogenous bone graft had significantly more new bone compared with calcium phosphate cement at 3 and 6 weeks. Calcium phosphate cement at 6 weeks presented similar results to autogenous bone at 3 weeks. Both treatments presented an increase in bone healing with time. Treatments allowed bone regeneration that increased with time, however surgical cavities treated with the autogenous graft had more bone formation than those with calcium phosphate cement.

Study of hard scattering processes in multihadron production from gammagamma collisions at LEP

Community Dentistry and Oral Epidemiology, 1994

The production of multihadronic states in collisions at LEP has been studied with the DELPHI dete... more The production of multihadronic states in collisions at LEP has been studied with the DELPHI detector. The analyzed data correspond to an integrated luminosity of about 32 pb 1 , collected in the LEP runs of 1990-1992. Minimum bias data and a sample of events with jets at high p T have been selected under the requirement that no scattered electron or positron is observed. The two data sets have been compared to Monte Carlo predictions. The non-perturbative contribution described by the Vector Meson Dominance Model and direct q q production from pointlike photons described by the Quark Parton Model were found to be insucient to reproduce the data. It has been necessary to include a third interaction component, which is due to perturbative hard scattering of the partonic constituents of the photon. Several parametrizations of the quark and gluon densities of the photon have been tested. The interplay with the cut in jet transverse momentum, which i s necessary for the separation of the perturbative and non-perturbative regions, is discussed. The data favour parametrizations with rather soft partonic content of the photon.

Download

Search for the standard model Higgs boson in Z0 decays

Nuclear Physics B, 1994

A search for the Standard Model Higgs boson was performed in the data sample of around 1 million ... more A search for the Standard Model Higgs boson was performed in the data sample of around 1 million hadronic Z 0 decays recorded in 1991 and 1992 with the DELPHI detector at LEP. The Higgs boson was searched for through its production in association with either neutrinos, electrons or muons. Four low mass events remain after the selections in the charged leptonic channels, that are likely to be due to background, especially four fermion processes. These results restrict the mass of the Standard Model Higgs boson to be larger than 55.7 GeV/c 2 at the 95 % condence level.

Download

Bis(thioether)silanes: Synthesis and characterization of tin(IV) complexes with new dithioether ligands

Main Group Chemistry, 2007

The bis (thioether) silanes Me2Si (CH2SR) 2 (abbreviated BtsR, where R= Me or Pri), the first two... more

A Distributed Framework for Scalable Large-Scale Crowd Simulation

Emerging applications in the area of Emergency Response and Disaster Management are increasingly ... more Emerging applications in the area of Emergency Response and Disaster Management are increasingly demanding interactive capabilities to allow for the quick understanding of a critical situation, in particular in urban environments. A key component of these interactive simulations is how to recreate the behavior of a crowd in real- time while supporting individual behaviors. Crowds can often be unpredictable and present mixed behaviors such as panic or aggression, that can very rapidly change based on unexpected new elements introduced into the environment. We present preliminary research specifically oriented towards the simulation of large crowds for emergency response and rescue planning situations. Our approach uses a highly scalable architecture integrated with an efficient rendering architecture and an immersive visualization environment for interaction. In this environment, users can specify complex scenarios, “plug-in” crowd behavior algorithms, and interactively steer the simulation to analyze and evaluate multiple “what if” situations.

Download

Interference of neutral kaons in the hadronic decays of the Z0

Physics Letters B, 1994

K 0 S K 0 S correlations have been studied in a sample of 717,511 hadronic events collected by th... more K 0 S K 0 S correlations have been studied in a sample of 717,511 hadronic events collected by the DELPHI detector at LEP during 1992. An enhancement is found in the production of pairs of K 0 S of similar momenta, as compared with a Monte Carlo simulated reference sample. The measured values for the strength of the correlation and the radius of the emitting source of kaons are = 1 : 13 0:54 (stat) 0:23 (syst) and r = 0 : 90 0:19 (stat) 0:10 (syst) fm.

Download

Policy-based integration of multiprovider digital home services

IEEE Network, 2009

The digital home is both the nexus of a new wave of user-centric service integration and the fron... more The digital home is both the nexus of a new wave of user-centric service integration and the front line of competition between device vendors, connectivity providers, and added-value service providers. Vertical integration of provider offerings via bundled services and devices is no longer sufficient to satisfy customer demands for best of breed elemental services and services composed from traditional service provider offerings, networked consumer devices, Web applications, and social networks. New digital home services spanning these domains must mediate between highly dynamic and overlapping sources of configuration and execution authority, while respecting the desires of the customer and simplifying their interactions with the system. In this article we present a policy-based federated service management architecture that addresses these concerns for digital home devices participating in end-to-end communications services. We also describe an OSGi-based gateway prototype of the architecture and investigate the scalability of our approach via simulation.

Download

PREGUNTAS CLAVES PARA LA ENTREVISTA DE TRABAJO

 El peor enemigo son los nervios  Conocer las preguntas que pueden descolocar  Añadir presión ... more

Download

Caracterizacion de la poblacion adolescente de instituciones educativas de la region oeste de Montevideo en relacion a la situacion de violencia en que viven

Download

Measurement of the e+e- -- gammagamma(gamma) cross section at LEP energies

Community Dentistry and Oral Epidemiology, 1994

Download

15th Congress of the International Headache Society 23-26 June 2011, Berlin, Germany

Cephalalgia, 2011