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Mostrando ítems 99-114 de 114

    • The 2:3:6 quasi-periodic oscillation structure in GRS 1915+105 and cubic subharmonics in the context of relativistic discoseismology 

      Ortega Rodríguez, Manuel; Solís Sánchez, Hugo; López Barquero, Vanessa; Matamoros Alvarado, Bryan; Venegas Li, Ariadna (Monthly Notices of the Royal Astronomical Society 440:3011-3015, 2014-06-01)
      We propose a simple toy model to explain the 2:3:6 quasi-periodic oscillation (QPO) structure in GRS 1915+105 and, more generally, the 2:3 QPO structure in XTE J1550−564, GRO J1655−40 and H1743−322. The model exploits the ...

    • The early rainy season in Central America: the role of thetropical North Atlantic SSTs 

      Maldonado Mora, Tito José; Alfaro Martínez, Eric J.; Rutgersson, Anna; Amador Astúa, Jorge Alberto (2016)
      We explored the relationship between the precipitation anomalies during May to June as the first peak of the rainy season in the Pacific slope of Central America, and sea surface temperature (SST) fluctuations in the ...

    • The gigaelectronvolt counterpart of ver j2019+407 in the northern shell of the supernova remnant g78.2+2.1 (γ cygni) 

      Fraija Cabrera, Nissim Illich; Araya Arguedas, Miguel (2016-07)
      Analysis of gamma-ray emission from the supernova remnant G78.2+2.1 (γ Cygni) with 7.2 years of cumulative data from the Fermi Large Area Telescope shows a distinct hard, bright, and extended component to the north of the ...

    • The High-Altitude water cherenkov (HAWC) observatory in México: The primary detector 

      Abeysekara, Anushka Udara; Albert, Andrea; Alfaro Molina, José Rubén; Álvarez, César LLorens; Álvarez Romero, Juan de Dios; Araya Arguedas, Miguel; Arteaga Velázquez, Juan Carlos; Arun Babu, Kollamparambil Paul; Ávila Rojas, Daniel Omar; Ayala Solares, Hugo Alberto; Babu, Rishi; Barber, Ahron S.; Becerril, Ana Delia; Belmont Moreno, Ernesto; BenZvi, Segev Y.; Blanco Alonso, Oscar; Braun, James R.; Brisbois, Chad; Caballero Mora, Karen Salomé; Cabrera Martínez, Jesús I.; Capistrán Rojas, Tomás; Carramiñana, Alberto; Casanova, Sabrina; Castillo, Mario A.; Chaparro Amaro, Oscar Roberto; Cotti Gollini, Umberto; Cotzomi, Jorge; Coutiño de León, Sara; De La Fuente Acosta, Eduardo; De León Acuña, Cederik León; DeYoung, Tyce; Díaz Hernández, Raquel; Dingus, Brenda L.; DuVernois, Michael A.; Durocher, Mora; Díaz Vélez, Juan Carlos; Ellsworth, Robert W.; Engel, Kristi L.; Espinoza Hernández, María Catalina; Fan, Kwok Lung; Fang, Ke; Fick, Brian E.; Fleischhack, Henrike; Flores, Jorge Luis; Fraija Cabrera, Nissim Illich; García González, José Andrés; García Torales, Guillermo; Garfias, Fernando; Giacinti, Gwenael; Goksu, Hazal; González, María Magdalena; González Muñoz, Adiv; Goodman, Jordán Alvin; Harding, J. Patrick; Hernández, Emma González; Hernández, Sergio; Hinton, James A.; Hona, Binita; Huang, Dezhi; Hueyotl Zahuantitla, Filiberto; Hui, Chiumun Michelle; Humensky, Thomas Brian; Hüntemeyer, Petra; Iriarte, Arturo; Imran, Asif; Jardin Blicq, Armelle; Joshi, Vikas; Kaufmann, Sarah; Kieda, David B.; Kunde, Gerd J.; Lara Sánchez, Alejandro; Lauer, Robert J.; Lee, William H.; Lennarz, Dirk; León Vargas, Hermes; Linnemann, James T.; Longinotti, Anna Lía; Luis Raya, Gilgamesh; Lundeen, Joseph; Malone, Kelly; Marandon, Vincent; Marinelli, Antonio; Martínez Bravo, Oscar Mario; Martínez Castellanos, Israel; Martínez Castro, Jesús Alberto; Martínez Huerta, Humberto; Matthews, John A.; Miranda Romagnoli, Pedro; Montaruli, Teresa; Morales Soto, Jorge Antonio; Moreno Barbosa, Eduardo; Mostafá, Miguel Alejandro; Nayerhoda, Amid; Nellen, Lukas; Newbold, Michael; Nisa, Mehr Un; Noriega Papaqui, Roberto; Oceguera Becerra, Tomas O.; Olivera Nieto, Laura; Omodei, Nicola; Peisker, Alison; Pérez Araujo, Yunior Frainen; Pérez Pérez, Eucario Gonzalo; Ponce, Lancho Epifanio; Pretz, John; Rho, Chang Dong; Rosa González, Daniel; Ruiz Velasco, Edna Loredana; Salazar Ibarguen, Humberto; Salazar Gallegos, Daniel; Salesa Greus, Francisco; Sandoval, Andrés; Schneider, Michael; Schoorlemmer, Harm; Serna Franco, José E.; Sinnis, Gus; Smith, Andrew James; Son, Youngwan; Sparks Woodle, Kathryne; Springer, Robert Wayne; Taboada, Ignacio J.; Tepe, Andreas; Tibolla, Omar; Tollefson, Kirsten Anne; Torres Aguilar, Ibrahim Daniel; Torres Escobedo, Ramiro; Turner, Rhiannon; Ureña Mena, Fernando Josué; Ukwatta, Tilan N.; Varela, Enrique; Vargas Magaña, Mariana; Villaseñor Cendejas, Luis Manuel; Wang, Xiaojie; Watson, Ian James; Werner, Felix; Westerhoff, Stefan; Willox, Elijah Job; Wisher, Ian G.; Wood, Joshua; Yodh, Gaurang B.; Zaborov, Dmitry N.; Zepeda, Arnulfo; Zhou, Hao (2023-07)
      The High-Altitude Water Cherenkov (HAWC) observatory is a second-generation continuously operated, wide field-of-view, TeV gamma-ray observatory. The HAWC observatory and its analysis techniques build on experience of the ...

    • The Hubble Constant and the Deceleration Parameter in Anisotropic Cosmological Spaces of Petrov type D 

      Alvarado Marín, Rodrigo Eduardo (2016-11)
      In this paper the Hubble parameter and the deceleration parameter are analyzed for a group of anisotropic homogeneous solutions of the Petrov type-D. It is obtained that for the said set of solutions can be constructed a ...

    • The Josephson junction as a quantum engine 

      Alicki, Robert; Horodecki, Michal; Jenkins Villalobos, Alejandro; Lobejko, Marcin; Suárez, Gerardo (2023-11-10)
      We treat the Cooper pairs in the superconducting electrodes of a Josephson junction (JJ) as an open system, coupled via Andreev scattering to external baths of electrons. The disequilibrium between the baths generates the ...

    • The mechanical career of Councillor Orffyreus, confidence man 

      Jenkins Villalobos, Alejandro (2013-05)
      In the early 18th century, J. E. E. Bessler, known as Orffyreus, constructed several wheels that he claimed could keep turning forever, powered only by gravity. He never revealed the details of his invention, but he ...

    • The problem of engines in statistical physics 

      Alicki, Robert; Gelbwaser Klimovsky, David; Jenkins Villalobos, Alejandro (2021-08-22)
      Engines are open systems that can generate work cyclically at the expense of an external disequilibrium. They are ubiquitous in nature and technology, but the course of mathematical physics over the last 300 years has ...

    • Tropical easterly waves over Costa Rica and their relationship to the diurnal cycle of rainfall 

      Wiggins, Rani M.; Lintner, Benjamin R.; Serra, Yolande L.; Durán Quesada, Ana María; Garbanzo Salas, Marcial; Hernández Deckers, Daniel; Torri, Giuseppe (2023-01)
      Using an index of tropical easterly wave (TEW) activity derived from spacetime-filtered outgoing longwave radiation, we construct composites of long-term hourly surface meteorological observations and morningtime sounding ...

    • Tropical precipitation anomalies and d‐excess evolution during El Niño 2014‐16 

      Sánchez Murillo, Ricardo; Durán Quesada, Ana María; Birkel Dostal, Christian; Esquivel Hernández, Germain; Boll, Jan (2016)
      The last 2014-16 El Niño event was among the three strongest episodes on record. El Niño considerably changes annual and seasonal precipitation across the tropics. Here, we present a unique stable isotope data set of daily ...

    • Tsunamis and Tsunami Hazards in Central America 

      Fernández Arce, Mario Enrique; Molina, Enrique; Havskov, Jens; Kuvvet, Atakan (2000-02)
      A tsunami catalogue for Central America is compiled containing 49 tsunamis for the period 1539–1996, thirty seven of them are in the Pacific and twelve in the Caribbean. At the Caribbean side, 5 events are related with ...

    • Tsunamis and tsunami prepardness in Costa Rica, Central America 

      Fernández Arce, Mario Enrique; Alvarado Delgado, Guillermo (2005-12)
      Pacific and Atlantic sides of Costa Rica there are coastal segments characterised by a flat relief, which increases the vulnerability of the coastal communities. In addition to tsunamis originating in the Middle American ...

    • Vacuum treatment to stabilize oxidation at low temperature region in porous silicon 

      Allen, Kevin; Pereira Cubillo, Juan Sebastián; Ramírez Porras, Arturo (2020)
      Oxidation in porous silicon is studied for as-etched samples and samples subjected to high vacuum at room temperature. Attenuated Total Reflectance (ATR) measurements in infrared spectroscopy for temperatures ranging from ...

    • Validación de Calidades de Rayos X Diagnósticos en el Laboratorio de Metrología de Radiaciones Ionizantes 

      Mora Rodríguez, Patricia; Noguera Vega, Gerardo; Porras Chaverri, Mariela (2018)
      El objetivo del trabajo fue validar la calidad de radiación para energía de radiodiagnósticos del Laboratorio de Metrología de la Universidad de Costa Rica (UCR) como parte del proyecto técnico de cooperación COS9008 ...

    • Verificación del Comisionamiento del Acelerador Lineal UNIQUE de Varian 

      Calvo Alfaro, Jorge Arturo (2021)
      Esta tesis trata sobre la Verificación del Comisionamiento del Acelerador Lineal UNIQUE, el cual se encuentra en el Hospital México. La metodología usada para este fin comprende el Protocolo Internacional para la Determinación ...

    • Why is the electrocaloric effect so small in ferroelectrics? 

      Guzmán Verri, Gian Giacomo; Littlewood, Peter B. (2016-05-19)
      Ferroelectrics are attractive candidate materials for environmentally friendly solid state refrigeration free of greenhouse gases. Their thermal response upon variations of external electric fields is largest in the vicinity ...