GC: n CT: Biotechnological approaches to reduce or modify lignin in biomass crops are predicated on the assumption that it is the principal determinant of the recalcitrance of biomass to enzymatic digestion for biofuels production. We defined quantitative trait loci (QTL) in the Intermated B73 x Mo17 (IBM) recombinant inbred
GC: n CT: Given the multifactorial etiology for MSD and its association with individual and workplace risk factors, their reduction and prevention will require a multidisciplinary effort. The science of ergonomics, biomechanics, epidemiology, and medicine are being used to better understand the interdependence of MSD. Ergonomics (Greek ergon = work
GC: n CT: Ethanol is an alternative fuel produced from starch contained in grains such as corn, grain sorghum, barley and sugarcane through a fermentation and distillation process that converts starch to sugar and then to alcohol (ethanol). Most ethanol in the U.S. is made from corn because it is
GC: n CT: Eutrophication is characterized by excessive plant and algal growth due to the increased availability of one or more limiting growth factors needed for photosynthesis (Schindler 2006), such as sunlight, carbon dioxide, and nutrient fertilizers. Eutrophication occurs naturally over centuries as lakes age and are filled in with
GC: adj CT: The minimum amount of runoff that must be preserved in order to maintain basin salt balance is conceptually calculated. The alternative, the conversion of all runoff into evapotranspiration, is unsustainable, because it will cause salts to accumulate without limit. Nature intended exorheic drainage basins to be in
GC: n CT: Paralyzed from the waist down after a BMX accident, Steven Sanchez rolled into SuitX’s Berkeley, California, office in a wheelchair. A half-hour later he was standing and walking thanks to the Phoenix—a robotic exoskeleton now available for around $40,000. The suit returns movement to wearers’ hips and
GC: n CT: An expansion tank is a metal tank connected to a building’s water heating appliance designed to accommodate fluctuations in the volume of a building’s hot water supply system. These fluctuations occur because water expands in volume as it gets hot and loses volume as it cools. Expanding
GC: n CT: Expert Systems are computer programs that are derived from a branch of computer science research called Artificial Intelligence (AI). AI’s scientific goal is to understand intelligence by building computer programs that exhibit intelligent behavior. It is concerned with the concepts and methods of symbolic inference, or reasoning,
GC: n CT: EXPERT SYSTEMS BUILDING TOOLS: DEFINITIONS An expert system tool, or shell, is a software development environment containing the basic components of expert systems. Associated with a shell is a prescribed method for building applications by configuring and instantiating these components. Some of the generic components of a
GC: n CT: In 1831, Michael Faraday, an English physicist gave one of the most basic laws of electromagnetism called Faraday’s law of electromagnetic induction. This law explains the working principle of most of the electrical motors, generators, electrical transformers and inductors. This law shows the relationship between electric circuit
GC: n CT: “Cybernetics” comes from the Greek: “the art of steering”. In short, cybernetics is a discipline for understanding how actions may lead to achieving goals. Knowing whether you have reached your goal (or at least are getting closer to it) requires “feedback“, a concept that comes from cybernetics.
GC: n CT: Energy flow. As we have seen, generating and utilising energy means converting energy from one form into another. Often, intermediate steps are Implied. The energy flows through a number of forms, as well as conversion steps, between the source and the end-use. The costs increase accordingly. We
GC: n CT: The trend in final energy consumption by fuel type and by sector provides a broad indication of progress in reducing final energy consumption and associated environmental impacts by the different end-use sectors (transport, industry, services and households). The type and magnitude of energy-related pressures on the environment
CG: n CT: A firewall is a system designed to prevent unauthorized access to or from a private network. You can implement a firewall in either hardware or software form, or a combination of both. Firewalls prevent unauthorized internet users from accessing private networks connected to the internet, especially intranets. All
GC: n CT: Pyrolysis is thermal degradation either in the complete absence of oxidizing agent, or with such a limited supply that gasification does not occur to an appreciable extent or may be described as partial gasification. Relatively low temperature are employed of 500 to 800 °C, compared to 800
GC: n CT: Flash steam power plants use hot water reservoirs. In flash plants, as hot water is released from the pressure of the deep reservoir in a flash tank, some if it flashes to steam. S: http://geothermal.marin.org/geopresentation/sld054.htm (last access: 26 February 2015) N: 1. Flash Steam Power Plants are
CG: n CT: Floating buoys have been developed which can generate energy from the bobbing or pitching motion caused by the waves. In some buoy type systems the buoy uses a simple mechanical system to turn a crankshaft. For example, in the Indian I-wave system the wave action raises the
CG: n CT: Calibrating a Parshall flume. Decrease water velocity: If the water velocity is too fast, the relationship between depth and velocity will be way off A small increase in depth will give you a disproportionately large change in discharge rate. You need to find some way to dissipate
CG: n CT: Since liquids are incompressible fluids, their flow rate depends only on the difference between the inlet and outlet pressures (Δp, pressure drop). The flow is the same whether the system pressure is low or high, so long as the difference between the inlet and outlet pressures is