Now showing items 1-20 of 69

    • Meisel, José D.; Sarmiento, Olga; Olaya, Camilo; Valdivia Hepp, Juan; Zarama, Roberto (Emerald, 2016)
      Purpose - Overweight, obesity, and physical inactivity have in recent years become an important public health problem worldwide. Investigations that study obesity using a systemic approach in low- and middle-income countries ...
    • Muñoz, Francisco; Cárdenas Valencia, Carlos; José, Rogan; Valdivia Hepp, Juan; Fuentealba Rosas, Patricio; Kiwi Tichauer, Miguel (ACS Publications, 2013-02-28)
      The dynamics of the collision process of a titanium dimer against a C-20 nanocluster in the bowl configuration is simulated by means ab initio molecular dynamics, focusing our interest on the first steps to synthesize ...
    • Muñoz, Francisco; Cardenas, Carlos; Rogan Castillo, José; Valdivia Hepp, Juan; Fuentealba Rosas, Patricio; Kiwi Tichauer, Miguel (2013)
      The dynamics of the collision process of a titanium dimer against a C 20 nanocluster in the bowl configuration is simulated by means ab initio molecular dynamics, focusing our interest on the first steps to synthesize ...
    • Hoyos, Jaime H.; Reisenegger, Andreas; Valdivia Hepp, Juan (WILEY-BLACKWELL, 2010-06-22)
      We study the effect of the non-linear process of ambipolar diffusion (joint transport of magnetic flux and charged particles relative to neutral particles) on the long-term behaviour of a non-uniform magnetic field in a ...
    • Montes, Felipe; Jaramillo, Ana María; Meisel, José D.; Díaz Guilera, Albert; Valdivia Hepp, Juan; Sarmiento, Olga L.; Zarama, Roberto (Nature, 2020)
      The explosion of network science has permitted an understanding of how the structure of social networks affects the dynamics of social contagion. In community-based interventions with spill-over effects, identifying ...
    • Gonzalez, Rafael I.; Valencia, F.; Rogan Castillo, José; Valdivia Hepp, Juan; Sofo, Jorge; Kiwi Tichauer, Miguel; Muñoz, Francisco (Royal Soc Chemistry, 2018)
      The bending process of 2D materials, subject to an external force, is investigated, and applied to graphene, molybdenum disulphide (MoS2), and imogolite. For graphene we obtained 3.43 eV angstrom(2) per atom for the bending ...
    • Muñoz, Francisco; Rogan Castillo, José; Valdivia Hepp, Juan; Varas, A.; Kiwi Tichauer, Miguel (Elsevier, 2013)
    • Varas, A.; Cornejo, M. D.; Mainemer, D.; Toledo Cabrera, Benjamín; Rogan Castillo, José; Muñoz Gálvez, Víctor; Valdivia Hepp, Juan (2007)
      A bidimensional cellular automaton model is used to simulate the process of evacuation of pedestrians in a room with fixed obstacles. A floor field is defined so that moving to a cell with lower floor field means approaching ...
    • Villalobos, J.; Toledo Cabrera, Benjamín; Pastén, D.; Muñoz Gálvez, Víctor; Rogan Castillo, José; Zarama, R.; Lammoglia, N.; Valdivia Hepp, Juan (2010)
      Urban traffic is interesting not only due to its obvious social and economical impact, but also due to its complexity. It is not unusual for drivers to get stuck in a traffic jam that apparently emerged from nowhere. ...
    • Asenjo, Felipe A.; Muñoz, Víctor; Valdivia Hepp, Juan; Hada, Tohru (2009)
      The dispersion relation for circularly polarized electromagnetic waves propagating in the direction of an external magnetic field in a relativistic electron-positron plasma with arbitrary constant drift velocities is ...
    • Castillo, F.; Toledo Cabrera, Benjamín; Muñoz Gálvez, Víctor; Rogan Castillo, José; Zarama, R.; Kiwi Tichauer, Miguel; Valdivia Hepp, Juan (Elsevier, 2014)
      We simulate traffic in a city by means of the evolution of a row of interacting cars, using a cellular automaton model, in a sequence of traffic lights synchronized by a ‘‘green wave’’. When our initial condition is a ...
    • Stepanova, M.; Valdivia Hepp, Juan (Elsevier, 2016)
      Since the very beginning of the space era, Latin–American scientists have been contributing to the understanding of the magnetosphere of the Earth. This review summarizes some significant contributions in this field with ...
    • Carrasco, Sebastián; Rogan Castillo, José; Valdivia Hepp, Juan (Nature Publishing Group, 2017)
      The problem of controlling the quantum state of a system is investigated using a time varying potential. As a concrete example we study the problem of a particle in a box with a periodically oscillating infinite square-well ...
    • Wanliss, James; Muñoz Gálvez, Víctor; Pastén Guzmán, Denisse; Toledo Cabrera, Benjamín; Valdivia Hepp, Juan (Springer, 2017)
      We explore bursty multiscale energy dissipation from earthquakes flanked by latitudes 29 degrees S and 35.5 degrees S, and longitudes 69.501 degrees W and 73.944 degrees W (in the Chilean central zone). Our work compares ...
    • Ramírez González, Max; Rogan Castillo, José; Valdivia Hepp, Juan; Varas, Alejandro; Kiwi Tichauer, Miguel (Walter de Gruyter, 2016)
      We characterize, by means of the definition of a generalized distance, the differences and similarities between binary nanoclusters. To define analytically, and to compute numerically this distance, we have generalized an ...
    • Rogan Castillo, José; Ramírez, Max; Muñoz, Víctor; Valdivia Hepp, Juan; García, Griselda; Ramírez, Ricardo; Kiwi Tichauer, Miguel (2009)
      The determination of the spatial distributions that atoms adopt to form condensed matter is a problem of crucial importance, since most physical properties depend on the atomic arrangement. This is especially relevant for ...
    • Montes, Felipe; Sarmiento, Olga L.; Zarama, Roberto; Pratt, Michael; Wang, Guijing; Jacoby, Enrique; Schmid, Thomas L.; Ramos, Mauricio; Ruiz, Oscar; Vargas, Olga; Michel, Gabriel; Zieff, Susan G.; Valdivia Hepp, Juan; Cavill, Nick; Kahlmeier, Sonja (Springer, 2012-02)
      One promising public health intervention for promoting physical activity is the Ciclovia program. The Ciclovia is a regular multisectorial community-based program in which streets are temporarily closed for motorized ...
    • Parra Rojas, César Andrés (Universidad de Chile, 2012)
      Un baño bacteriano consiste en un fluido en el que nadan bacterias. Este nado produce agitaciones en el sistema, induciendo un campo de velocidades en él. En esta tesis, se presenta un estudio hidrodinámico de las ...
    • Muñoz Gálvez, Víctor; Domínguez, Macarena; Valdivia Hepp, Juan; Good, Simon; Nigro, Giuseppina; Carbone, Vincenzo (European Geosciences Union, 2018)
      We studied the temporal evolution of fractality for geomagnetic activity, by calculating fractal dimensions from the Dst data and from a magnetohydrodynamic shell model for turbulent magnetized plasma, which may be a useful ...
    • Navarro, Roberto E.; Muñoz Gálvez, Víctor; Valdivia Hepp, Juan; Moya Fuentes, Pablo (IOP Publishing, 2020)
      Wave-particle interactions are believed to be one of the most important kinetic processes regulating the heating and acceleration of solar wind plasma. One possible explanation for the observed preferential heating of alpha ...