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Ashburn, VA, United States

Villagomez D.,University of Geneva | Villagomez D.,Analysis Inc. | Spikings R.,University of Geneva
Lithos | Year: 2013

New thermochronological data record a complex cooling history in the Central and Western Cordilleras of Colombia that is a function of Early Cretaceous to late Miocene tectonic events. Alkali-feldspar 40Ar/39Ar cooling ages of ~138-130Ma immediately post-date the cessation of Jurassic arc-magmatism and a major unconformity within the retro-foreland region of the northern Andes. We interpret these ages as cooling driven by exhumation in response to either compression driven by subduction of a seamount, or extension and oceanward migration of the slab during the earliest Cretaceous, giving rise to the Lower Cretaceous Quebradagrande arc sequence. Biotite and alkali-feldspar 40Ar/39Ar data from the palaeocontinental margin reveal the presence of a younger cooling event at 117-107Ma, which was contemporaneous with hornblende 40Ar/39Ar cooling ages obtained from medium-high P-T metamorphic relicts of a Late Jurassic-Early Cretaceous subduction channel. This cooling event is attributed to exhumation driven by the collision and accretion of a fringing arc against the continental margin, and obduction of the subduction channel onto the forearc. Inverse modelling of zircon and apatite fission track and (U-Th)/He data from throughout the Central and Western Cordilleras reveals three periods of rapid cooling since the Late Cretaceous. The earliest phase is recorded by Jurassic and Cretaceous granitoids that cooled rapidly during 75-65Ma. We attribute cooling to exhumation of the continental margin during ~75-70Ma (~1.6km/My), which was forced by the collision and accretion of the Caribbean Large Igneous Province in the Campanian. The Central Cordillera exhumed at moderate rates of ~0.3km/My during ~45-30Ma, which are also observed over widely dispersed regions along the Andean chain, and were probably caused by an increase in continent-ocean plate convergence rates. Exhumation rates drastically increased in the middle-late Miocene, with the greatest amount occurring in southern Colombia as a consequence of the collision and subduction of the buoyant Carnegie Ridge at 15Ma. © 2013 Elsevier B.V..

Analysis Inc. | Date: 2010-11-09

An active air heater is constructed to produce heat and to transfer heat to an air flow for heating a building. The active air heater comprises spaced apart fins; adjacent elements between the fins; and an electrical source directing an electrical current through the fins and the adjacent elements for heating the fins and the adjacent elements and the air flowing through the air flow passageways formed by the adjacent elements. The adjacent elements are porous, semi-conductor material having a roughness in its surfaces for enhancing the convective heat transfer between the material and the air flow. The active air heater may be rectangular or cylindrical. The porous, semi-conductor material includes carbon foams, ceramic foams, high temperature polymer foams, and low conductance alloy foams and the aforementioned materials in nano-material format.

A simple and compact apparatus, and a method, for determining the characteristics of a number of fluids used in the truck and automotive industries including coolant, bio-diesel, gas-ethanol and diesel engine fluid (DEF). The apparatus includes a sample container providing optical paths of different lengths for making measurements on a sample. The dual path length design allows the apparatus to capture both NIR and UV spectral ranges. The qualitative and quantitative properties of the fluid under test are compared to test results under normal conditions or to the properties of unused fluid. Two light sources are used within a spectrometer with each source being associated with a different optical path length.

National Health Research Institute and Analysis Inc. | Date: 2012-07-09

A specimen kit having a tiny chamber is disclosed for a specimen preparation for TEM. The space height of the chamber is far smaller than dimensions of blood cells and therefore is adapted to sort nanoparticles from the blood cells. The specimen prepared under this invention is suitable for TEM observation over a true distribution status of nanoparticles in blood. The extremely tiny space height in Z direction eliminates the possibility of aggregation of the nanoparticles and/or agglomeration in Z direction during drying; therefore, a specimen prepared under this invention is suitable for TEM observation over the dispersion and/or agglomeration of nanoparticles in a blood.

Analysis Inc. | Date: 2010-10-20

Moving object detecting, tracking, and displaying systems are provided. Systems illustratively include a graphical user interface and a processing unit. The processing unit is a functional part of the system that executes computer readable instructions to generate the graphical user interface. The graphical user interface may include an alert and tracking window that has a first dimension that corresponds to a temporal domain and a second dimension that corresponds to a spatial domain. In some embodiments, alert and tracking windows include target tracking markers. Target tracking markers optionally provide information about moving objects such as, but not limited to, information about past locations of moving objects and information about sizes of moving objects. Certain embodiments may also include other features such as zoom windows, playback controls, and graphical imagery added to a display to highlight moving objects.

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