Introduction: The structure of the Chicxulub crater has been actively investigated by potential field modeling, seismic reflection and refraction surveys, and drilling during the decade since its recognition as the crater responsible for mass extinction which terminated the Cretaceous Period. Given the data sets that are now available to delineate crater structure a surprisingly diverse number ...

Purpose The article analyzes how oil price fluctuations are reflected in the management of Petróleos Mexicanos (Pemex) based on its balance sheet (BS) and particularly affect Pemex's corporate income. Design/methodology/approach author uses a vector auto-regressive (VAR) model with seven variables for period 1977–2019. first variable is others belong to BS: total income, sales revenue, operatin...

We present a study of some organizational properties of the oil transport network of the Mexican oil company (PEMEX) in a region of the State of Tabasco. Particularly, the generalized centrality and the distribution of connectivities are calculated in order to evaluate some aspects of the structure of the network. We find that the connectivities (k) are characterized by a degree distribution wh...

This paper challenges the tendency of the information systems (IS) literature to subsume IS innovation in processes of organizational change, either with the role of the ‘enabler’ of organizational objectives, or as an instrument appropriated by situated organizational actors. Using institutionalist theory, the relationship between information systems development and organizational transformati...

Corresponding author: Dr. Juan Carlos Navarro Vargas. Calle Plan de Ayutla N° 57-A, Colonia Ticomán, C.P. 07320. México D.F., México. Telephone: (044 55) 3896 7527. E-mail: dr.solearjfen28@hotmail. com 1 Urology Resident, Hospital Regional Lic. Adolfo López Mateos, Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado. Mexico City, Mexico. 2 Urology Surgeon, Urology Service...