Spatial models of energy flow and nutrient dynamicsRoMerrick Dacullo
This document discusses several spatial models used to simulate energy flow and nutrient dynamics in ecosystems. It describes the CENTURY model, which simulates grassland ecosystems, and how it has been combined with GIS data to model spatial patterns in carbon and nitrogen storage. It also discusses the FOREST-BGC model for simulating forest carbon, nitrogen, and water cycles over broad landscapes, and the FIRE-BGC model which incorporates the effects of fire disturbances into FOREST-BGC. The document emphasizes that spatial variations in environmental factors can produce substantial variation in ecosystem processes, and that models need to operate at appropriate spatial scales to develop predictive relationships.
Spatial models of energy flow and nutrient dynamicsRoMerrick Dacullo
This document discusses several spatial models used to simulate energy flow and nutrient dynamics in ecosystems. It describes the CENTURY model, which simulates grassland ecosystems, and how it has been combined with GIS data to model spatial patterns in carbon and nitrogen storage. It also discusses the FOREST-BGC model for simulating forest carbon, nitrogen, and water cycles over broad landscapes, and the FIRE-BGC model which incorporates the effects of fire disturbances into FOREST-BGC. The document emphasizes that spatial variations in environmental factors can produce substantial variation in ecosystem processes, and that models need to operate at appropriate spatial scales to develop predictive relationships.
Christiaan Huygens was a 17th century Dutch scientist who made important contributions to physics, including developing Huygens' Principle which describes wave propagation. Huygens' Principle represents each point on a wave front as a point source of secondary spherical wavelets, with the new wave front being the tangent lines to these secondary wavelets. Plane waves have parallel wave fronts, while spherical waves have expanding spherical wave fronts due to the point source nature of the secondary wavelets.
This document discusses Pig on Spark, which allows Pig programs to run on Apache Spark. It provides an overview of Pig, Spark, and how Pig programs are executed on Spark. Pig programs are compiled to logical and physical plans, then translated to Spark plans where Spark operators perform the data processing. This enables powerful, low-latency data analysis using Pig's simple dataflow language on Spark's in-memory computation engine.
The document discusses guidelines for reporting bugs during quality assurance (QA) testing, including collecting documentation, deciding on testing phases, submitting bugs to the tracker with accurate summaries and descriptions, setting priorities, and standard bug resolutions and statuses. Key steps include testing on QA servers, using build numbers, searching for duplicates before reporting, and providing screenshots and reproduction steps.
This document discusses the application of remote sensing and geographical information systems in civil engineering. It provides details on topics like resolving power, modulation transfer function, dispersing elements, spectroscopic filters, and types of spectrometers. Resolving power is defined as the minimum distance between two image points that can be detected. It depends on factors like wavelength of light and aperture diameter. The modulation transfer function describes how well an imaging system transfers contrast from the subject to the image. Dispersing elements like prisms and diffraction gratings are used to separate light into spectra. Spectroscopic filters allow only certain wavelength ranges to pass through. And spectrometers are instruments used to measure and record spectra, with types including dispersing and interference
Paul O'Brien has over 13 years of experience as a groundworker and ganger in the construction industry. He is a reliable, hardworking team player capable of multi-tasking and working independently or leading a team. His skills include operating construction equipment, reading schedules, ensuring safety compliance, and competently performing tasks like concrete work, drainage, and material handling. He is seeking a new position where he can apply his extensive experience in groundwork and construction site supervision.
This document discusses several double strollers and their features. It notes that double strollers can be difficult to choose because there are many factors to consider like the ages of children. Some double strollers are side-by-side, while others can convert between side-by-side and inline configurations. The document highlights features of several popular double stroller models, such as adjustable seats and canopies, air-filled tires for a smooth ride, storage baskets, and compatibility with infant car seats.